How to use mountMutableSource method in Playwright Internal

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ReactFiberHooks.new.js

Source:ReactFiberHooks.new.js

...1808      subscribe                                            ,1809    )           {1810      currentHookNameInDev = 'useMutableSource';1811      mountHookTypesDev();1812      return mountMutableSource(source, getSnapshot, subscribe);1813    },1814    useOpaqueIdentifier()                      {1815      currentHookNameInDev = 'useOpaqueIdentifier';1816      mountHookTypesDev();1817      return mountOpaqueIdentifier();1818    },1819    unstable_isNewReconciler: enableNewReconciler,1820  };1821  HooksDispatcherOnMountWithHookTypesInDEV = {1822    readContext   (1823      context                 ,1824      observedBits                         ,1825    )    {1826      return readContext(context, observedBits);1827    },1828    useCallback   (callback   , deps                            )    {1829      currentHookNameInDev = 'useCallback';1830      updateHookTypesDev();1831      return mountCallback(callback, deps);1832    },1833    useContext   (1834      context                 ,1835      observedBits                         ,1836    )    {1837      currentHookNameInDev = 'useContext';1838      updateHookTypesDev();1839      return readContext(context, observedBits);1840    },1841    useEffect(1842      create                           ,1843      deps                            ,1844    )       {1845      currentHookNameInDev = 'useEffect';1846      updateHookTypesDev();1847      return mountEffect(create, deps);1848    },1849    useImperativeHandle   (1850      ref                                                                   ,1851      create         ,1852      deps                            ,1853    )       {1854      currentHookNameInDev = 'useImperativeHandle';1855      updateHookTypesDev();1856      return mountImperativeHandle(ref, create, deps);1857    },1858    useLayoutEffect(1859      create                           ,1860      deps                            ,1861    )       {1862      currentHookNameInDev = 'useLayoutEffect';1863      updateHookTypesDev();1864      return mountLayoutEffect(create, deps);1865    },1866    useMemo   (create         , deps                            )    {1867      currentHookNameInDev = 'useMemo';1868      updateHookTypesDev();1869      const prevDispatcher = ReactCurrentDispatcher.current;1870      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnMountInDEV;1871      try {1872        return mountMemo(create, deps);1873      } finally {1874        ReactCurrentDispatcher.current = prevDispatcher;1875      }1876    },1877    useReducer         (1878      reducer             ,1879      initialArg   ,1880      init         ,1881    )                   {1882      currentHookNameInDev = 'useReducer';1883      updateHookTypesDev();1884      const prevDispatcher = ReactCurrentDispatcher.current;1885      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnMountInDEV;1886      try {1887        return mountReducer(reducer, initialArg, init);1888      } finally {1889        ReactCurrentDispatcher.current = prevDispatcher;1890      }1891    },1892    useRef   (initialValue   )                 {1893      currentHookNameInDev = 'useRef';1894      updateHookTypesDev();1895      return mountRef(initialValue);1896    },1897    useState   (1898      initialState               ,1899    )                                     {1900      currentHookNameInDev = 'useState';1901      updateHookTypesDev();1902      const prevDispatcher = ReactCurrentDispatcher.current;1903      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnMountInDEV;1904      try {1905        return mountState(initialState);1906      } finally {1907        ReactCurrentDispatcher.current = prevDispatcher;1908      }1909    },1910    useDebugValue   (value   , formatterFn                      )       {1911      currentHookNameInDev = 'useDebugValue';1912      updateHookTypesDev();1913      return mountDebugValue(value, formatterFn);1914    },1915    useDeferredValue   (value   )    {1916      currentHookNameInDev = 'useDeferredValue';1917      updateHookTypesDev();1918      return mountDeferredValue(value);1919    },1920    useTransition()                                  {1921      currentHookNameInDev = 'useTransition';1922      updateHookTypesDev();1923      return mountTransition();1924    },1925    useMutableSource                  (1926      source                       ,1927      getSnapshot                                              ,1928      subscribe                                            ,1929    )           {1930      currentHookNameInDev = 'useMutableSource';1931      updateHookTypesDev();1932      return mountMutableSource(source, getSnapshot, subscribe);1933    },1934    useOpaqueIdentifier()                      {1935      currentHookNameInDev = 'useOpaqueIdentifier';1936      updateHookTypesDev();1937      return mountOpaqueIdentifier();1938    },1939    unstable_isNewReconciler: enableNewReconciler,1940  };1941  HooksDispatcherOnUpdateInDEV = {1942    readContext   (1943      context                 ,1944      observedBits                         ,1945    )    {1946      return readContext(context, observedBits);1947    },1948    useCallback   (callback   , deps                            )    {1949      currentHookNameInDev = 'useCallback';1950      updateHookTypesDev();1951      return updateCallback(callback, deps);1952    },1953    useContext   (1954      context                 ,1955      observedBits                         ,1956    )    {1957      currentHookNameInDev = 'useContext';1958      updateHookTypesDev();1959      return readContext(context, observedBits);1960    },1961    useEffect(1962      create                           ,1963      deps                            ,1964    )       {1965      currentHookNameInDev = 'useEffect';1966      updateHookTypesDev();1967      return updateEffect(create, deps);1968    },1969    useImperativeHandle   (1970      ref                                                                   ,1971      create         ,1972      deps                            ,1973    )       {1974      currentHookNameInDev = 'useImperativeHandle';1975      updateHookTypesDev();1976      return updateImperativeHandle(ref, create, deps);1977    },1978    useLayoutEffect(1979      create                           ,1980      deps                            ,1981    )       {1982      currentHookNameInDev = 'useLayoutEffect';1983      updateHookTypesDev();1984      return updateLayoutEffect(create, deps);1985    },1986    useMemo   (create         , deps                            )    {1987      currentHookNameInDev = 'useMemo';1988      updateHookTypesDev();1989      const prevDispatcher = ReactCurrentDispatcher.current;1990      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnUpdateInDEV;1991      try {1992        return updateMemo(create, deps);1993      } finally {1994        ReactCurrentDispatcher.current = prevDispatcher;1995      }1996    },1997    useReducer         (1998      reducer             ,1999      initialArg   ,2000      init         ,2001    )                   {2002      currentHookNameInDev = 'useReducer';2003      updateHookTypesDev();2004      const prevDispatcher = ReactCurrentDispatcher.current;2005      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnUpdateInDEV;2006      try {2007        return updateReducer(reducer, initialArg, init);2008      } finally {2009        ReactCurrentDispatcher.current = prevDispatcher;2010      }2011    },2012    useRef   (initialValue   )                 {2013      currentHookNameInDev = 'useRef';2014      updateHookTypesDev();2015      return updateRef(initialValue);2016    },2017    useState   (2018      initialState               ,2019    )                                     {2020      currentHookNameInDev = 'useState';2021      updateHookTypesDev();2022      const prevDispatcher = ReactCurrentDispatcher.current;2023      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnUpdateInDEV;2024      try {2025        return updateState(initialState);2026      } finally {2027        ReactCurrentDispatcher.current = prevDispatcher;2028      }2029    },2030    useDebugValue   (value   , formatterFn                      )       {2031      currentHookNameInDev = 'useDebugValue';2032      updateHookTypesDev();2033      return updateDebugValue(value, formatterFn);2034    },2035    useDeferredValue   (value   )    {2036      currentHookNameInDev = 'useDeferredValue';2037      updateHookTypesDev();2038      return updateDeferredValue(value);2039    },2040    useTransition()                                  {2041      currentHookNameInDev = 'useTransition';2042      updateHookTypesDev();2043      return updateTransition();2044    },2045    useMutableSource                  (2046      source                       ,2047      getSnapshot                                              ,2048      subscribe                                            ,2049    )           {2050      currentHookNameInDev = 'useMutableSource';2051      updateHookTypesDev();2052      return updateMutableSource(source, getSnapshot, subscribe);2053    },2054    useOpaqueIdentifier()                      {2055      currentHookNameInDev = 'useOpaqueIdentifier';2056      updateHookTypesDev();2057      return updateOpaqueIdentifier();2058    },2059    unstable_isNewReconciler: enableNewReconciler,2060  };2061  HooksDispatcherOnRerenderInDEV = {2062    readContext   (2063      context                 ,2064      observedBits                         ,2065    )    {2066      return readContext(context, observedBits);2067    },2068    useCallback   (callback   , deps                            )    {2069      currentHookNameInDev = 'useCallback';2070      updateHookTypesDev();2071      return updateCallback(callback, deps);2072    },2073    useContext   (2074      context                 ,2075      observedBits                         ,2076    )    {2077      currentHookNameInDev = 'useContext';2078      updateHookTypesDev();2079      return readContext(context, observedBits);2080    },2081    useEffect(2082      create                           ,2083      deps                            ,2084    )       {2085      currentHookNameInDev = 'useEffect';2086      updateHookTypesDev();2087      return updateEffect(create, deps);2088    },2089    useImperativeHandle   (2090      ref                                                                   ,2091      create         ,2092      deps                            ,2093    )       {2094      currentHookNameInDev = 'useImperativeHandle';2095      updateHookTypesDev();2096      return updateImperativeHandle(ref, create, deps);2097    },2098    useLayoutEffect(2099      create                           ,2100      deps                            ,2101    )       {2102      currentHookNameInDev = 'useLayoutEffect';2103      updateHookTypesDev();2104      return updateLayoutEffect(create, deps);2105    },2106    useMemo   (create         , deps                            )    {2107      currentHookNameInDev = 'useMemo';2108      updateHookTypesDev();2109      const prevDispatcher = ReactCurrentDispatcher.current;2110      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnRerenderInDEV;2111      try {2112        return updateMemo(create, deps);2113      } finally {2114        ReactCurrentDispatcher.current = prevDispatcher;2115      }2116    },2117    useReducer         (2118      reducer             ,2119      initialArg   ,2120      init         ,2121    )                   {2122      currentHookNameInDev = 'useReducer';2123      updateHookTypesDev();2124      const prevDispatcher = ReactCurrentDispatcher.current;2125      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnRerenderInDEV;2126      try {2127        return rerenderReducer(reducer, initialArg, init);2128      } finally {2129        ReactCurrentDispatcher.current = prevDispatcher;2130      }2131    },2132    useRef   (initialValue   )                 {2133      currentHookNameInDev = 'useRef';2134      updateHookTypesDev();2135      return updateRef(initialValue);2136    },2137    useState   (2138      initialState               ,2139    )                                     {2140      currentHookNameInDev = 'useState';2141      updateHookTypesDev();2142      const prevDispatcher = ReactCurrentDispatcher.current;2143      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnRerenderInDEV;2144      try {2145        return rerenderState(initialState);2146      } finally {2147        ReactCurrentDispatcher.current = prevDispatcher;2148      }2149    },2150    useDebugValue   (value   , formatterFn                      )       {2151      currentHookNameInDev = 'useDebugValue';2152      updateHookTypesDev();2153      return updateDebugValue(value, formatterFn);2154    },2155    useDeferredValue   (value   )    {2156      currentHookNameInDev = 'useDeferredValue';2157      updateHookTypesDev();2158      return rerenderDeferredValue(value);2159    },2160    useTransition()                                  {2161      currentHookNameInDev = 'useTransition';2162      updateHookTypesDev();2163      return rerenderTransition();2164    },2165    useMutableSource                  (2166      source                       ,2167      getSnapshot                                              ,2168      subscribe                                            ,2169    )           {2170      currentHookNameInDev = 'useMutableSource';2171      updateHookTypesDev();2172      return updateMutableSource(source, getSnapshot, subscribe);2173    },2174    useOpaqueIdentifier()                      {2175      currentHookNameInDev = 'useOpaqueIdentifier';2176      updateHookTypesDev();2177      return rerenderOpaqueIdentifier();2178    },2179    unstable_isNewReconciler: enableNewReconciler,2180  };2181  InvalidNestedHooksDispatcherOnMountInDEV = {2182    readContext   (2183      context                 ,2184      observedBits                         ,2185    )    {2186      warnInvalidContextAccess();2187      return readContext(context, observedBits);2188    },2189    useCallback   (callback   , deps                            )    {2190      currentHookNameInDev = 'useCallback';2191      warnInvalidHookAccess();2192      mountHookTypesDev();2193      return mountCallback(callback, deps);2194    },2195    useContext   (2196      context                 ,2197      observedBits                         ,2198    )    {2199      currentHookNameInDev = 'useContext';2200      warnInvalidHookAccess();2201      mountHookTypesDev();2202      return readContext(context, observedBits);2203    },2204    useEffect(2205      create                           ,2206      deps                            ,2207    )       {2208      currentHookNameInDev = 'useEffect';2209      warnInvalidHookAccess();2210      mountHookTypesDev();2211      return mountEffect(create, deps);2212    },2213    useImperativeHandle   (2214      ref                                                                   ,2215      create         ,2216      deps                            ,2217    )       {2218      currentHookNameInDev = 'useImperativeHandle';2219      warnInvalidHookAccess();2220      mountHookTypesDev();2221      return mountImperativeHandle(ref, create, deps);2222    },2223    useLayoutEffect(2224      create                           ,2225      deps                            ,2226    )       {2227      currentHookNameInDev = 'useLayoutEffect';2228      warnInvalidHookAccess();2229      mountHookTypesDev();2230      return mountLayoutEffect(create, deps);2231    },2232    useMemo   (create         , deps                            )    {2233      currentHookNameInDev = 'useMemo';2234      warnInvalidHookAccess();2235      mountHookTypesDev();2236      const prevDispatcher = ReactCurrentDispatcher.current;2237      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnMountInDEV;2238      try {2239        return mountMemo(create, deps);2240      } finally {2241        ReactCurrentDispatcher.current = prevDispatcher;2242      }2243    },2244    useReducer         (2245      reducer             ,2246      initialArg   ,2247      init         ,2248    )                   {2249      currentHookNameInDev = 'useReducer';2250      warnInvalidHookAccess();2251      mountHookTypesDev();2252      const prevDispatcher = ReactCurrentDispatcher.current;2253      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnMountInDEV;2254      try {2255        return mountReducer(reducer, initialArg, init);2256      } finally {2257        ReactCurrentDispatcher.current = prevDispatcher;2258      }2259    },2260    useRef   (initialValue   )                 {2261      currentHookNameInDev = 'useRef';2262      warnInvalidHookAccess();2263      mountHookTypesDev();2264      return mountRef(initialValue);2265    },2266    useState   (2267      initialState               ,2268    )                                     {2269      currentHookNameInDev = 'useState';2270      warnInvalidHookAccess();2271      mountHookTypesDev();2272      const prevDispatcher = ReactCurrentDispatcher.current;2273      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnMountInDEV;2274      try {2275        return mountState(initialState);2276      } finally {2277        ReactCurrentDispatcher.current = prevDispatcher;2278      }2279    },2280    useDebugValue   (value   , formatterFn                      )       {2281      currentHookNameInDev = 'useDebugValue';2282      warnInvalidHookAccess();2283      mountHookTypesDev();2284      return mountDebugValue(value, formatterFn);2285    },2286    useDeferredValue   (value   )    {2287      currentHookNameInDev = 'useDeferredValue';2288      warnInvalidHookAccess();2289      mountHookTypesDev();2290      return mountDeferredValue(value);2291    },2292    useTransition()                                  {2293      currentHookNameInDev = 'useTransition';2294      warnInvalidHookAccess();2295      mountHookTypesDev();2296      return mountTransition();2297    },2298    useMutableSource                  (2299      source                       ,2300      getSnapshot                                              ,2301      subscribe                                            ,2302    )           {2303      currentHookNameInDev = 'useMutableSource';2304      warnInvalidHookAccess();2305      mountHookTypesDev();2306      return mountMutableSource(source, getSnapshot, subscribe);2307    },2308    useOpaqueIdentifier()                      {2309      currentHookNameInDev = 'useOpaqueIdentifier';2310      warnInvalidHookAccess();2311      mountHookTypesDev();2312      return mountOpaqueIdentifier();2313    },2314    unstable_isNewReconciler: enableNewReconciler,2315  };2316  InvalidNestedHooksDispatcherOnUpdateInDEV = {2317    readContext   (2318      context                 ,2319      observedBits                         ,2320    )    {...

ReactFiberHooks.old.js

Source:ReactFiberHooks.old.js

...1768      subscribe                                            ,1769    )           {1770      currentHookNameInDev = 'useMutableSource';1771      mountHookTypesDev();1772      return mountMutableSource(source, getSnapshot, subscribe);1773    },1774    useOpaqueIdentifier()                      {1775      currentHookNameInDev = 'useOpaqueIdentifier';1776      mountHookTypesDev();1777      return mountOpaqueIdentifier();1778    },1779    unstable_isNewReconciler: enableNewReconciler,1780  };1781  HooksDispatcherOnMountWithHookTypesInDEV = {1782    readContext   (1783      context                 ,1784      observedBits                         ,1785    )    {1786      return readContext(context, observedBits);1787    },1788    useCallback   (callback   , deps                            )    {1789      currentHookNameInDev = 'useCallback';1790      updateHookTypesDev();1791      return mountCallback(callback, deps);1792    },1793    useContext   (1794      context                 ,1795      observedBits                         ,1796    )    {1797      currentHookNameInDev = 'useContext';1798      updateHookTypesDev();1799      return readContext(context, observedBits);1800    },1801    useEffect(1802      create                           ,1803      deps                            ,1804    )       {1805      currentHookNameInDev = 'useEffect';1806      updateHookTypesDev();1807      return mountEffect(create, deps);1808    },1809    useImperativeHandle   (1810      ref                                                                   ,1811      create         ,1812      deps                            ,1813    )       {1814      currentHookNameInDev = 'useImperativeHandle';1815      updateHookTypesDev();1816      return mountImperativeHandle(ref, create, deps);1817    },1818    useLayoutEffect(1819      create                           ,1820      deps                            ,1821    )       {1822      currentHookNameInDev = 'useLayoutEffect';1823      updateHookTypesDev();1824      return mountLayoutEffect(create, deps);1825    },1826    useMemo   (create         , deps                            )    {1827      currentHookNameInDev = 'useMemo';1828      updateHookTypesDev();1829      const prevDispatcher = ReactCurrentDispatcher.current;1830      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnMountInDEV;1831      try {1832        return mountMemo(create, deps);1833      } finally {1834        ReactCurrentDispatcher.current = prevDispatcher;1835      }1836    },1837    useReducer         (1838      reducer             ,1839      initialArg   ,1840      init         ,1841    )                   {1842      currentHookNameInDev = 'useReducer';1843      updateHookTypesDev();1844      const prevDispatcher = ReactCurrentDispatcher.current;1845      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnMountInDEV;1846      try {1847        return mountReducer(reducer, initialArg, init);1848      } finally {1849        ReactCurrentDispatcher.current = prevDispatcher;1850      }1851    },1852    useRef   (initialValue   )                 {1853      currentHookNameInDev = 'useRef';1854      updateHookTypesDev();1855      return mountRef(initialValue);1856    },1857    useState   (1858      initialState               ,1859    )                                     {1860      currentHookNameInDev = 'useState';1861      updateHookTypesDev();1862      const prevDispatcher = ReactCurrentDispatcher.current;1863      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnMountInDEV;1864      try {1865        return mountState(initialState);1866      } finally {1867        ReactCurrentDispatcher.current = prevDispatcher;1868      }1869    },1870    useDebugValue   (value   , formatterFn                      )       {1871      currentHookNameInDev = 'useDebugValue';1872      updateHookTypesDev();1873      return mountDebugValue(value, formatterFn);1874    },1875    useDeferredValue   (value   )    {1876      currentHookNameInDev = 'useDeferredValue';1877      updateHookTypesDev();1878      return mountDeferredValue(value);1879    },1880    useTransition()                                  {1881      currentHookNameInDev = 'useTransition';1882      updateHookTypesDev();1883      return mountTransition();1884    },1885    useMutableSource                  (1886      source                       ,1887      getSnapshot                                              ,1888      subscribe                                            ,1889    )           {1890      currentHookNameInDev = 'useMutableSource';1891      updateHookTypesDev();1892      return mountMutableSource(source, getSnapshot, subscribe);1893    },1894    useOpaqueIdentifier()                      {1895      currentHookNameInDev = 'useOpaqueIdentifier';1896      updateHookTypesDev();1897      return mountOpaqueIdentifier();1898    },1899    unstable_isNewReconciler: enableNewReconciler,1900  };1901  HooksDispatcherOnUpdateInDEV = {1902    readContext   (1903      context                 ,1904      observedBits                         ,1905    )    {1906      return readContext(context, observedBits);1907    },1908    useCallback   (callback   , deps                            )    {1909      currentHookNameInDev = 'useCallback';1910      updateHookTypesDev();1911      return updateCallback(callback, deps);1912    },1913    useContext   (1914      context                 ,1915      observedBits                         ,1916    )    {1917      currentHookNameInDev = 'useContext';1918      updateHookTypesDev();1919      return readContext(context, observedBits);1920    },1921    useEffect(1922      create                           ,1923      deps                            ,1924    )       {1925      currentHookNameInDev = 'useEffect';1926      updateHookTypesDev();1927      return updateEffect(create, deps);1928    },1929    useImperativeHandle   (1930      ref                                                                   ,1931      create         ,1932      deps                            ,1933    )       {1934      currentHookNameInDev = 'useImperativeHandle';1935      updateHookTypesDev();1936      return updateImperativeHandle(ref, create, deps);1937    },1938    useLayoutEffect(1939      create                           ,1940      deps                            ,1941    )       {1942      currentHookNameInDev = 'useLayoutEffect';1943      updateHookTypesDev();1944      return updateLayoutEffect(create, deps);1945    },1946    useMemo   (create         , deps                            )    {1947      currentHookNameInDev = 'useMemo';1948      updateHookTypesDev();1949      const prevDispatcher = ReactCurrentDispatcher.current;1950      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnUpdateInDEV;1951      try {1952        return updateMemo(create, deps);1953      } finally {1954        ReactCurrentDispatcher.current = prevDispatcher;1955      }1956    },1957    useReducer         (1958      reducer             ,1959      initialArg   ,1960      init         ,1961    )                   {1962      currentHookNameInDev = 'useReducer';1963      updateHookTypesDev();1964      const prevDispatcher = ReactCurrentDispatcher.current;1965      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnUpdateInDEV;1966      try {1967        return updateReducer(reducer, initialArg, init);1968      } finally {1969        ReactCurrentDispatcher.current = prevDispatcher;1970      }1971    },1972    useRef   (initialValue   )                 {1973      currentHookNameInDev = 'useRef';1974      updateHookTypesDev();1975      return updateRef(initialValue);1976    },1977    useState   (1978      initialState               ,1979    )                                     {1980      currentHookNameInDev = 'useState';1981      updateHookTypesDev();1982      const prevDispatcher = ReactCurrentDispatcher.current;1983      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnUpdateInDEV;1984      try {1985        return updateState(initialState);1986      } finally {1987        ReactCurrentDispatcher.current = prevDispatcher;1988      }1989    },1990    useDebugValue   (value   , formatterFn                      )       {1991      currentHookNameInDev = 'useDebugValue';1992      updateHookTypesDev();1993      return updateDebugValue(value, formatterFn);1994    },1995    useDeferredValue   (value   )    {1996      currentHookNameInDev = 'useDeferredValue';1997      updateHookTypesDev();1998      return updateDeferredValue(value);1999    },2000    useTransition()                                  {2001      currentHookNameInDev = 'useTransition';2002      updateHookTypesDev();2003      return updateTransition();2004    },2005    useMutableSource                  (2006      source                       ,2007      getSnapshot                                              ,2008      subscribe                                            ,2009    )           {2010      currentHookNameInDev = 'useMutableSource';2011      updateHookTypesDev();2012      return updateMutableSource(source, getSnapshot, subscribe);2013    },2014    useOpaqueIdentifier()                      {2015      currentHookNameInDev = 'useOpaqueIdentifier';2016      updateHookTypesDev();2017      return updateOpaqueIdentifier();2018    },2019    unstable_isNewReconciler: enableNewReconciler,2020  };2021  HooksDispatcherOnRerenderInDEV = {2022    readContext   (2023      context                 ,2024      observedBits                         ,2025    )    {2026      return readContext(context, observedBits);2027    },2028    useCallback   (callback   , deps                            )    {2029      currentHookNameInDev = 'useCallback';2030      updateHookTypesDev();2031      return updateCallback(callback, deps);2032    },2033    useContext   (2034      context                 ,2035      observedBits                         ,2036    )    {2037      currentHookNameInDev = 'useContext';2038      updateHookTypesDev();2039      return readContext(context, observedBits);2040    },2041    useEffect(2042      create                           ,2043      deps                            ,2044    )       {2045      currentHookNameInDev = 'useEffect';2046      updateHookTypesDev();2047      return updateEffect(create, deps);2048    },2049    useImperativeHandle   (2050      ref                                                                   ,2051      create         ,2052      deps                            ,2053    )       {2054      currentHookNameInDev = 'useImperativeHandle';2055      updateHookTypesDev();2056      return updateImperativeHandle(ref, create, deps);2057    },2058    useLayoutEffect(2059      create                           ,2060      deps                            ,2061    )       {2062      currentHookNameInDev = 'useLayoutEffect';2063      updateHookTypesDev();2064      return updateLayoutEffect(create, deps);2065    },2066    useMemo   (create         , deps                            )    {2067      currentHookNameInDev = 'useMemo';2068      updateHookTypesDev();2069      const prevDispatcher = ReactCurrentDispatcher.current;2070      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnRerenderInDEV;2071      try {2072        return updateMemo(create, deps);2073      } finally {2074        ReactCurrentDispatcher.current = prevDispatcher;2075      }2076    },2077    useReducer         (2078      reducer             ,2079      initialArg   ,2080      init         ,2081    )                   {2082      currentHookNameInDev = 'useReducer';2083      updateHookTypesDev();2084      const prevDispatcher = ReactCurrentDispatcher.current;2085      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnRerenderInDEV;2086      try {2087        return rerenderReducer(reducer, initialArg, init);2088      } finally {2089        ReactCurrentDispatcher.current = prevDispatcher;2090      }2091    },2092    useRef   (initialValue   )                 {2093      currentHookNameInDev = 'useRef';2094      updateHookTypesDev();2095      return updateRef(initialValue);2096    },2097    useState   (2098      initialState               ,2099    )                                     {2100      currentHookNameInDev = 'useState';2101      updateHookTypesDev();2102      const prevDispatcher = ReactCurrentDispatcher.current;2103      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnRerenderInDEV;2104      try {2105        return rerenderState(initialState);2106      } finally {2107        ReactCurrentDispatcher.current = prevDispatcher;2108      }2109    },2110    useDebugValue   (value   , formatterFn                      )       {2111      currentHookNameInDev = 'useDebugValue';2112      updateHookTypesDev();2113      return updateDebugValue(value, formatterFn);2114    },2115    useDeferredValue   (value   )    {2116      currentHookNameInDev = 'useDeferredValue';2117      updateHookTypesDev();2118      return rerenderDeferredValue(value);2119    },2120    useTransition()                                  {2121      currentHookNameInDev = 'useTransition';2122      updateHookTypesDev();2123      return rerenderTransition();2124    },2125    useMutableSource                  (2126      source                       ,2127      getSnapshot                                              ,2128      subscribe                                            ,2129    )           {2130      currentHookNameInDev = 'useMutableSource';2131      updateHookTypesDev();2132      return updateMutableSource(source, getSnapshot, subscribe);2133    },2134    useOpaqueIdentifier()                      {2135      currentHookNameInDev = 'useOpaqueIdentifier';2136      updateHookTypesDev();2137      return rerenderOpaqueIdentifier();2138    },2139    unstable_isNewReconciler: enableNewReconciler,2140  };2141  InvalidNestedHooksDispatcherOnMountInDEV = {2142    readContext   (2143      context                 ,2144      observedBits                         ,2145    )    {2146      warnInvalidContextAccess();2147      return readContext(context, observedBits);2148    },2149    useCallback   (callback   , deps                            )    {2150      currentHookNameInDev = 'useCallback';2151      warnInvalidHookAccess();2152      mountHookTypesDev();2153      return mountCallback(callback, deps);2154    },2155    useContext   (2156      context                 ,2157      observedBits                         ,2158    )    {2159      currentHookNameInDev = 'useContext';2160      warnInvalidHookAccess();2161      mountHookTypesDev();2162      return readContext(context, observedBits);2163    },2164    useEffect(2165      create                           ,2166      deps                            ,2167    )       {2168      currentHookNameInDev = 'useEffect';2169      warnInvalidHookAccess();2170      mountHookTypesDev();2171      return mountEffect(create, deps);2172    },2173    useImperativeHandle   (2174      ref                                                                   ,2175      create         ,2176      deps                            ,2177    )       {2178      currentHookNameInDev = 'useImperativeHandle';2179      warnInvalidHookAccess();2180      mountHookTypesDev();2181      return mountImperativeHandle(ref, create, deps);2182    },2183    useLayoutEffect(2184      create                           ,2185      deps                            ,2186    )       {2187      currentHookNameInDev = 'useLayoutEffect';2188      warnInvalidHookAccess();2189      mountHookTypesDev();2190      return mountLayoutEffect(create, deps);2191    },2192    useMemo   (create         , deps                            )    {2193      currentHookNameInDev = 'useMemo';2194      warnInvalidHookAccess();2195      mountHookTypesDev();2196      const prevDispatcher = ReactCurrentDispatcher.current;2197      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnMountInDEV;2198      try {2199        return mountMemo(create, deps);2200      } finally {2201        ReactCurrentDispatcher.current = prevDispatcher;2202      }2203    },2204    useReducer         (2205      reducer             ,2206      initialArg   ,2207      init         ,2208    )                   {2209      currentHookNameInDev = 'useReducer';2210      warnInvalidHookAccess();2211      mountHookTypesDev();2212      const prevDispatcher = ReactCurrentDispatcher.current;2213      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnMountInDEV;2214      try {2215        return mountReducer(reducer, initialArg, init);2216      } finally {2217        ReactCurrentDispatcher.current = prevDispatcher;2218      }2219    },2220    useRef   (initialValue   )                 {2221      currentHookNameInDev = 'useRef';2222      warnInvalidHookAccess();2223      mountHookTypesDev();2224      return mountRef(initialValue);2225    },2226    useState   (2227      initialState               ,2228    )                                     {2229      currentHookNameInDev = 'useState';2230      warnInvalidHookAccess();2231      mountHookTypesDev();2232      const prevDispatcher = ReactCurrentDispatcher.current;2233      ReactCurrentDispatcher.current = InvalidNestedHooksDispatcherOnMountInDEV;2234      try {2235        return mountState(initialState);2236      } finally {2237        ReactCurrentDispatcher.current = prevDispatcher;2238      }2239    },2240    useDebugValue   (value   , formatterFn                      )       {2241      currentHookNameInDev = 'useDebugValue';2242      warnInvalidHookAccess();2243      mountHookTypesDev();2244      return mountDebugValue(value, formatterFn);2245    },2246    useDeferredValue   (value   )    {2247      currentHookNameInDev = 'useDeferredValue';2248      warnInvalidHookAccess();2249      mountHookTypesDev();2250      return mountDeferredValue(value);2251    },2252    useTransition()                                  {2253      currentHookNameInDev = 'useTransition';2254      warnInvalidHookAccess();2255      mountHookTypesDev();2256      return mountTransition();2257    },2258    useMutableSource                  (2259      source                       ,2260      getSnapshot                                              ,2261      subscribe                                            ,2262    )           {2263      currentHookNameInDev = 'useMutableSource';2264      warnInvalidHookAccess();2265      mountHookTypesDev();2266      return mountMutableSource(source, getSnapshot, subscribe);2267    },2268    useOpaqueIdentifier()                      {2269      currentHookNameInDev = 'useOpaqueIdentifier';2270      warnInvalidHookAccess();2271      mountHookTypesDev();2272      return mountOpaqueIdentifier();2273    },2274    unstable_isNewReconciler: enableNewReconciler,2275  };2276  InvalidNestedHooksDispatcherOnUpdateInDEV = {2277    readContext   (2278      context                 ,2279      observedBits                         ,2280    )    {...

ReactFiberHooks.js

Source:ReactFiberHooks.js

1import ReactCurrentDispatcher from "../react/ReactCurrentDispatcher";2import { requestEventTime, requestUpdateLane } from "./ReactFiberWorkLoop";3import {4  Update as UpdateEffect,5  Passive as PassiveEffect,6} from "./ReactFiberFlags";7import {8  HasEffect as HookHasEffect,9  Layout as HookLayout,10  Passive as HookPassive,11} from "./ReactHookEffectTags";12// The work-in-progress fiber. I've named it differently to distinguish it from13// the work-in-progress hook.14let currentlyRenderingFiber = null;15// Hooks are stored as a linked list on the fiber's memoizedState field. The16// current hook list is the list that belongs to the current fiber. The17// work-in-progress hook list is a new list that will be added to the18// work-in-progress fiber.19// Hooks ç¨é¾è¡¨ç»æï¼ åè´®å¨fiber's memoizedStateåæ®µ20// Hook | null21let currentHook = null;22// Hook | null23let workInProgressHook = null;24// Whether an update was scheduled at any point during the render phase. This25// does not get reset if we do another render pass; only when we're completely26// finished evaluating this component. This is an optimization so we know27// whether we need to clear render phase updates after a throw.28let didScheduleRenderPhaseUpdate = false;29// Where an update was scheduled only during the current render pass. This30// gets reset after each attempt.31// TODO: Maybe there's some way to consolidate this with32// `didScheduleRenderPhaseUpdate`. Or with `numberOfReRenders`.33let didScheduleRenderPhaseUpdateDuringThisPass = false;34export function renderWithHooks(35  // null36  current,37  workInProgress,38  // è¿éæ¯å½æ°ç»ä»¶ï¼ å¶å®å°±æ¯wip.type39  Component,40  // wip.props41  props,42  // context43  secondArg,44  nextRenderLanes45) {46  renderLanes = nextRenderLanes;47  currentlyRenderingFiber = workInProgress;48  // ä¸ºä½è¿è¾¹å°±å·²ç»æ¸ç©º memoizedState å updateQueue äº?49  workInProgress.memoizedState = null;50  workInProgress.updateQueue = null;51  workInProgress.lanes = NoLanes;52  // The following should have already been reset53  // currentHook = null;54  // workInProgressHook = null;55  // didScheduleRenderPhaseUpdate = false;56  // TODO Warn if no hooks are used at all during mount, then some are used during update.57  // Currently we will identify the update render as a mount because memoizedState === null.58  // This is tricky because it's valid for certain types of components (e.g. React.lazy)59  // Using memoizedState to differentiate between mount/update only works if at least one stateful hook is used.60  // Non-stateful hooks (e.g. context) don't get added to memoizedState,61  // so memoizedState would be null during updates and mounts.62  // Dispatcher è·useStateæå³63  ReactCurrentDispatcher.current =64    current === null || current.memoizedState === null65      ? HooksDispatcherOnMount66      : HooksDispatcherOnUpdate;67  // ç´æ¥æ§è¡ç»ä»¶å½æ°, å¾å°ä¸ä¸ª jsx object68  let children = Component(props, secondArg);69  // Check if there was a render phase update70  if (didScheduleRenderPhaseUpdateDuringThisPass) {71    // Keep rendering in a loop for as long as render phase updates continue to72    // be scheduled. Use a counter to prevent infinite loops.73    let numberOfReRenders = 0;74    do {75      didScheduleRenderPhaseUpdateDuringThisPass = false;76      invariant(77        numberOfReRenders < RE_RENDER_LIMIT,78        "Too many re-renders. React limits the number of renders to prevent " +79          "an infinite loop."80      );81      numberOfReRenders += 1;82      // Start over from the beginning of the list83      currentHook = null;84      workInProgressHook = null;85      workInProgress.updateQueue = null;86      ReactCurrentDispatcher.current = HooksDispatcherOnRerender;87      children = Component(props, secondArg);88    } while (didScheduleRenderPhaseUpdateDuringThisPass);89  }90  // We can assume the previous dispatcher is always this one, since we set it91  // at the beginning of the render phase and there's no re-entrancy.92  ReactCurrentDispatcher.current = ContextOnlyDispatcher;93  // This check uses currentHook so that it works the same in DEV and prod bundles.94  // hookTypesDev could catch more cases (e.g. context) but only in DEV bundles.95  const didRenderTooFewHooks =96    currentHook !== null && currentHook.next !== null;97  renderLanes = NoLanes;98  currentlyRenderingFiber = null;99  currentHook = null;100  workInProgressHook = null;101  didScheduleRenderPhaseUpdate = false;102  invariant(103    !didRenderTooFewHooks,104    "Rendered fewer hooks than expected. This may be caused by an accidental " +105      "early return statement."106  );107  return children;108}109function mountWorkInProgressHook() {110  const hook = {111    memoizedState: null,112    baseState: null,113    baseQueue: null,114    queue: null,115    next: null,116  };117  if (workInProgressHook === null) {118    // This is the first hook in the list119    currentlyRenderingFiber.memoizedState = workInProgressHook = hook;120  } else {121    // ä¸ä¸ªå½æ°ç»ä»¶éé¢ï¼ ä¸¤ä¸ªä»¥ä¸çhookå°±èµ°è¿éï¼ é¾èµ·æ¥äº~122    // Append to the end of the list123    workInProgressHook = workInProgressHook.next = hook;124  }125  return workInProgressHook;126}127function createFunctionComponentUpdateQueue() {128  return {129    lastEffect: null,130  };131}132/**133 * ætagä¸º HookHasEffect|HookPassiveçeffectåå¥fiber.updateQueue134 */135function pushEffect(tag, create, destroy, deps) {136  const effect = {137    tag,138    create,139    destroy,140    deps,141    // Circular142    next: null,143  };144  // å¨æå¦ä¹ çä¾åé, è¿ä¸ªfiberæ¯Appå½æ°ç»ä»¶, å¯¹åºçfiberèç¹æ¯æ²¡æupdateQueueç(åå»ºçæ¶åå°±æ²¡æåå§å)145  let componentUpdateQueue = currentlyRenderingFiber.updateQueue;146  if (componentUpdateQueue === null) {147    componentUpdateQueue = createFunctionComponentUpdateQueue();148    currentlyRenderingFiber.updateQueue = componentUpdateQueue;149    componentUpdateQueue.lastEffect = effect.next = effect;150  } else {151    // è¿éè·updateQueue.shared.pendingé£ä¸ªåå¾ªç¯æäºä¸ä¸æ ·,152    const lastEffect = componentUpdateQueue.lastEffect;153    if (lastEffect === null) {154      componentUpdateQueue.lastEffect = effect.next = effect;155    } else {156      const firstEffect = lastEffect.next;157      lastEffect.next = effect;158      effect.next = firstEffect;159      componentUpdateQueue.lastEffect = effect;160    }161  }162  return effect;163}164function mountEffectImpl(fiberFlags, hookFlags, create, deps) {165  const hook = mountWorkInProgressHook();166  const nextDeps = deps === undefined ? null : deps;167  // å¦å¼ï¼ å°±å¨è¿ï¼ è¿ä¸ªfiberä¸æäº PassiveEffect168  // å¨æå¦çä¾åéï¼ å¯¹äºcomponent App, å¶flagså¨åå»ºçæ¶å169  // ç± placeSingleChild å½æ°æä¸ Placement = 2170  // è¿éåè· UpdateEffect | PassiveEffect ååå¹¶171  currentlyRenderingFiber.flags |= fiberFlags;172  // åªæ¯åå¥updateQueue, **å¹¶ä¸æ§è¡**173  // æ³¨æ, è¿édestroyææ¶ä¸ºundefined, å ä¸ºdestroyå½æ°æ¯createå½æ°çè¿åå¼174  hook.memoizedState = pushEffect(175    HookHasEffect | hookFlags,176    create,177    undefined,178    nextDeps179  );180}181function mountEffect(create, deps) {182  return mountEffectImpl(183    UpdateEffect | PassiveEffect,184    HookPassive,185    create,186    deps187  );188}189function mountState(initialState) {190  // wip.memoizedState å¡ä¸ä¸ªç©ºçhookå¯¹è±¡ï¼ä½ä¸ºhookåé¾è¡¨çèµ·ç¹(?)191  const hook = mountWorkInProgressHook();192  if (typeof initialState === "function") {193    // useStateçåå§ç¶ææ¯å½æ°ï¼ è¿éæ§è¡å½æ°ï¼ è¿åå¼èµå¼ç»initialState194    initialState = initialState();195  }196  hook.memoizedState = hook.baseState = initialState;197  const queue = (hook.queue = {198    pending: null,199    dispatch: null,200    lastRenderedReducer: basicStateReducer,201    lastRenderedState: initialState,202  });203  // const [a, setA] = useState('a')204  // setA å°±æ¯è¿éç dispatchAction205  const dispatch = (queue.dispatch = dispatchAction.bind(206    null,207    currentlyRenderingFiber,208    queue209  ));210  return [hook.memoizedState, dispatch];211}212// è¿å½æ°åå¤´åç213function dispatchAction(fiber, queue, action) {214  const eventTime = requestEventTime();215  const lane = requestUpdateLane(fiber);216  const update = {217    lane,218    action,219    eagerReducer: null,220    eagerState: null,221    next: null,222  };223  // Append the update to the end of the list.224  const pending = queue.pending;225  if (pending === null) {226    // This is the first update. Create a circular list.227    update.next = update;228  } else {229    update.next = pending.next;230    pending.next = update;231  }232  queue.pending = update;233  const alternate = fiber.alternate;234  if (235    fiber === currentlyRenderingFiber ||236    (alternate !== null && alternate === currentlyRenderingFiber)237  ) {238    // This is a render phase update. Stash it in a lazily-created map of239    // queue -> linked list of updates. After this render pass, we'll restart240    // and apply the stashed updates on top of the work-in-progress hook.241    didScheduleRenderPhaseUpdateDuringThisPass =242      didScheduleRenderPhaseUpdate = true;243  } else {244    if (245      fiber.lanes === NoLanes &&246      (alternate === null || alternate.lanes === NoLanes)247    ) {248      // The queue is currently empty, which means we can eagerly compute the249      // next state before entering the render phase. If the new state is the250      // same as the current state, we may be able to bail out entirely.251      const lastRenderedReducer = queue.lastRenderedReducer;252      if (lastRenderedReducer !== null) {253        let prevDispatcher;254        try {255          const currentState = queue.lastRenderedState;256          const eagerState = lastRenderedReducer(currentState, action);257          // Stash the eagerly computed state, and the reducer used to compute258          // it, on the update object. If the reducer hasn't changed by the259          // time we enter the render phase, then the eager state can be used260          // without calling the reducer again.261          update.eagerReducer = lastRenderedReducer;262          update.eagerState = eagerState;263          if (is(eagerState, currentState)) {264            // Fast path. We can bail out without scheduling React to re-render.265            // It's still possible that we'll need to rebase this update later,266            // if the component re-renders for a different reason and by that267            // time the reducer has changed.268            return;269          }270        } catch (error) {271          // Suppress the error. It will throw again in the render phase.272        }273      }274    }275    // å¼å§renderé¶æ®µå¯276    scheduleUpdateOnFiber(fiber, lane, eventTime);277  }278}279export const ContextOnlyDispatcher = {280  readContext,281  useCallback: throwInvalidHookError,282  useContext: throwInvalidHookError,283  useEffect: throwInvalidHookError,284  useImperativeHandle: throwInvalidHookError,285  useLayoutEffect: throwInvalidHookError,286  useMemo: throwInvalidHookError,287  useReducer: throwInvalidHookError,288  useRef: throwInvalidHookError,289  useState: throwInvalidHookError,290  useDebugValue: throwInvalidHookError,291  useDeferredValue: throwInvalidHookError,292  useTransition: throwInvalidHookError,293  useMutableSource: throwInvalidHookError,294  useOpaqueIdentifier: throwInvalidHookError,295  unstable_isNewReconciler: enableNewReconciler,296};297const HooksDispatcherOnMount = {298  readContext,299  useCallback: mountCallback,300  useContext: readContext,301  useEffect: mountEffect,302  useImperativeHandle: mountImperativeHandle,303  useLayoutEffect: mountLayoutEffect,304  useMemo: mountMemo,305  useReducer: mountReducer,306  useRef: mountRef,307  useState: mountState,308  useDebugValue: mountDebugValue,309  useDeferredValue: mountDeferredValue,310  useTransition: mountTransition,311  useMutableSource: mountMutableSource,312  useOpaqueIdentifier: mountOpaqueIdentifier,313  unstable_isNewReconciler: enableNewReconciler,314};315const HooksDispatcherOnUpdate = {316  readContext,317  useCallback: updateCallback,318  useContext: readContext,319  useEffect: updateEffect,320  useImperativeHandle: updateImperativeHandle,321  useLayoutEffect: updateLayoutEffect,322  useMemo: updateMemo,323  useReducer: updateReducer,324  useRef: updateRef,325  useState: updateState,326  useDebugValue: updateDebugValue,327  useDeferredValue: updateDeferredValue,328  useTransition: updateTransition,329  useMutableSource: updateMutableSource,330  useOpaqueIdentifier: updateOpaqueIdentifier,331  unstable_isNewReconciler: enableNewReconciler,332};333const HooksDispatcherOnRerender = {334  readContext,335  useCallback: updateCallback,336  useContext: readContext,337  useEffect: updateEffect,338  useImperativeHandle: updateImperativeHandle,339  useLayoutEffect: updateLayoutEffect,340  useMemo: updateMemo,341  useReducer: rerenderReducer,342  useRef: updateRef,343  useState: rerenderState,344  useDebugValue: updateDebugValue,345  useDeferredValue: rerenderDeferredValue,346  useTransition: rerenderTransition,347  useMutableSource: updateMutableSource,348  useOpaqueIdentifier: rerenderOpaqueIdentifier,349  unstable_isNewReconciler: enableNewReconciler,...

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  const source = await page._browserContext._browser._chromium._connection._transport._socket;7  const { mountMutableSource } = require('playwright');8  await mountMutableSource(source, 'test', 'Test');9  await page.screenshot({ path: 'example.png' });10  await browser.close();11})();12const { chromium } = require('playwright');13(async () => {14  const browser = await chromium.launch();15  const context = await browser.newContext();16  const page = await context.newPage();17  const source = await page._browserContext._browser._chromium._connection._transport._socket;18  const { mountMutableSource } = require('playwright');19  await mountMutableSource(source, 'test', 'Test');20  await page.screenshot({ path: 'example.png' });21  await browser.close();22})();

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  const source = await page._delegate._browserContext.newCDPSession(page);7  const { root, setProps } = await page.mountMutableSource(source);8  console.log(root);9  console.log(setProps);10  await browser.close();11})();12const { chromium } = require('playwright');13(async () => {14  const browser = await chromium.launch();15  const context = await browser.newContext();16  const page = await context.newPage();17  const { root, setProps } = await page.mount(() => {18    return {19      root: {20        props: { id: 'foo' },21        children: [{ name: 'span', props: {}, children: ['bar'] }],22      },23      setProps: (el, props) => {24        el.props = props;25      },26    };27  });28  console.log(root);29  console.log(setProps);30  await browser.close();31})();32const { chromium } = require('playwright');33(async () => {34  const browser = await chromium.launch();35  const context = await browser.newContext();36  const page = await context.newPage();37  const { root, setProps } = await page.mount(() => {38    return {39      root: {40        props: { id: 'foo' },41        children: [{ name: 'span', props: {}, children: ['bar'] }],42      },43      setProps: (el, props) => {44        el.props = props;45      },46    };47  });48  console.log(root);49  console.log(setProps);50  await browser.close();51})();52const { chromium } = require('playwright');53(async () => {54  const browser = await chromium.launch();55  const context = await browser.newContext();56  const page = await context.newPage();57  const { root, setProps } = await page.mount(() => {58    return {59      root: {60        props: { id: 'foo' },61        children: [{ name: 'span', props: {}, children: ['bar

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch({ headless: false});4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.screenshot({ path: `screenshot.png` });7  await browser.close();8})();9const { chromium } = require('playwright');10(async () => {11  const browser = await chromium.launch({ headless: false});12  const context = await browser.newContext();13  const page = await context.newPage();14  await page.screenshot({ path: `screenshot.png` });15  await browser.close();16})();17const { chromium } = require('playwright');18(async () => {19  const browser = await chromium.launch({ headless: false});20  const context = await browser.newContext();21  const page = await context.newPage();22  await page.screenshot({ path: `screenshot.png` });23  await browser.close();24})();25const { chromium } = require('playwright');26(async () => {27  const browser = await chromium.launch({ headless: false});28  const context = await browser.newContext();29  const page = await context.newPage();30  await page.screenshot({ path: `screenshot.png` });31  await browser.close();32})();33const { chromium } = require('playwright');34(async () => {35  const browser = await chromium.launch({ headless: false});36  const context = await browser.newContext();37  const page = await context.newPage();38  await page.screenshot({ path: `screenshot.png` });39  await browser.close();40})();

Using AI Code Generation

1const { mountMutableSource } = require('playwright');2const { createServer } = require('http');3const { createReadStream } = require('fs');4const server = createServer((req, res) => {5  const stream = createReadStream('./test.html');6  stream.pipe(res);7});8server.listen(3000, () => {9  mountMutableSource(server);10});11const { unmountMutableSource } = require('playwright');12unmountMutableSource();13- [`new BrowserContext([options])`](#new-browsercontextoptions)14- [`browserContext.addCookies(cookies)`](#browsercontextaddcookiescookies)15- [`browserContext.addInitScript(script[, arg])`](#browsercontextaddinitscriptscript-arg)16- [`browserContext.addInitScript(script[, arg])`](#browsercontextaddinitscriptscript-arg-1)17- [`browserContext.addInitScript(script[, arg])`](#browsercontextaddinitscriptscript-arg-2)18- [`browserContext.addInitScript(script[, arg])`](#browsercontextaddinitscriptscript-arg-3)19- [`browserContext.addInitScript(script[, arg])`](#browsercontextaddinitscriptscript-arg-4)20- [`browserContext.addInitScript(script[, arg])`](#browsercontextaddinitscriptscript-arg-5)21- [`browserContext.addInitScript(script[, arg])`](#browsercontextaddinitscriptscript-arg-6)22- [`browserContext.addInitScript(script[, arg])`](#browsercontextaddinitscriptscript-arg-7)23- [`browserContext.addInitScript(script[, arg])`](#browsercontextaddinitscriptscript-arg-8)24- [`browserContext.addInitScript(script[, arg])`](#browsercontextaddinitscriptscript-arg-9)25- [`browserContext.addInitScript(script[, arg])`](#browsercontextaddinitscriptscript-arg-10)26- [`browserContext.addInitScript(script[, arg])`](#browsercontextaddinitscriptscript-arg-11)27- [`browserContext.addInitScript(script[, arg])`](#browsercontextaddinitscriptscript-arg-12)

Using AI Code Generation

1const playwright = require('playwright');2const { mountMutableSource } = require('playwright/lib/server/supplements/mutableSource/mountMutableSource');3(async () => {4  const browser = await playwright.chromium.launch({ headless: false });5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.screenshot({ path: 'example.png' });8  await browser.close();9})();

Using AI Code Generation

1const { mountMutableSource } = require("playwright");2const { createServer } = require("http");3const server = createServer((req, res) => {4  res.end("Hello World");5});6server.listen(3000);7const { mountMutableSource } = require("playwright");8const { createServer } = require("http");9const server = createServer((req, res) => {10  res.end("Hello World");11});12server.listen(3000);

Using AI Code Generation

1import { mountMutableSource } from "playwright-core/lib/server/supplements/mountable/mountableSupplement";2const mount = mountMutableSource(source, "/path/to/mount");3import { unmount } from "playwright-core/lib/server/supplements/mountable/mountableSupplement";4unmount(mount);5import { mountableSupplement } from "playwright-core/lib/server/playwrightServer";6const mount = mountableSupplement.mount(source, "/path/to/mount");7const mount = mountableSupplement.mountFileOrDirectory("path/to/file", "/path/to/mount");8const mount = mountableSupplement.mountFileOrDirectory("path/to/file", "/path/to/mount");9const mount = mountableSupplement.mountFileOrDirectory("path/to/file", "/path/to/mount");10const mount = mountableSupplement.mountFileOrDirectory("path/to/file", "/path/to/mount");

Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.