How to use readFromUnsubcribedMutableSource method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberHooks.js

Source:ReactFiberHooks.js

...847  const getVersion = source._getVersion;848  const version = getVersion(source._source);849  const dispatcher = ReactCurrentDispatcher.current;850  let [snapshot, setSnapshot] = dispatcher.useState(() =>851    readFromUnsubcribedMutableSource(root, source, getSnapshot),852  );853  // Grab a handle to the state hook as well.854  // We use it to clear the pending update queue if we have a new source.855  const stateHook = ((workInProgressHook: any): Hook);856  const memoizedState = ((hook.memoizedState: any): MutableSourceMemoizedState<857    Source,858    Snapshot,859  >);860  const refs = memoizedState.refs;861  const prevGetSnapshot = refs.getSnapshot;862  const prevSource = memoizedState.source;863  const prevSubscribe = memoizedState.subscribe;864  const fiber = currentlyRenderingFiber;865  hook.memoizedState = ({866    refs,867    source,868    subscribe,869  }: MutableSourceMemoizedState<Source, Snapshot>);870  // Sync the values needed by our subscribe function after each commit.871  dispatcher.useEffect(() => {872    refs.getSnapshot = getSnapshot;873  }, [getSnapshot]);874  // If we got a new source or subscribe function,875  // we'll need to subscribe in a passive effect,876  // and also check for any changes that fire between render and subscribe.877  dispatcher.useEffect(() => {878    const handleChange = () => {879      const latestGetSnapshot = refs.getSnapshot;880      try {881        setSnapshot(latestGetSnapshot(source._source));882        // Record a pending mutable source update with the same expiration time.883        const currentTime = requestCurrentTimeForUpdate();884        const suspenseConfig = requestCurrentSuspenseConfig();885        const expirationTime = computeExpirationForFiber(886          currentTime,887          fiber,888          suspenseConfig,889        );890        setPendingExpirationTime(root, expirationTime);891      } catch (error) {892        // A selector might throw after a source mutation.893        // e.g. it might try to read from a part of the store that no longer exists.894        // In this case we should still schedule an update with React.895        // Worst case the selector will throw again and then an error boundary will handle it.896        setSnapshot(() => {897          throw error;898        });899      }900    };901    const unsubscribe = subscribe(source._source, handleChange);902    if (__DEV__) {903      if (typeof unsubscribe !== 'function') {904        console.error(905          'Mutable source subscribe function must return an unsubscribe function.',906        );907      }908    }909    // Check for a possible change between when we last rendered and when we just subscribed.910    const maybeNewVersion = getVersion(source._source);911    if (!is(version, maybeNewVersion)) {912      const maybeNewSnapshot = getSnapshot(source._source);913      if (!is(snapshot, maybeNewSnapshot)) {914        setSnapshot(maybeNewSnapshot);915      }916    }917    return unsubscribe;918  }, [source, subscribe]);919  // If any of the inputs to useMutableSource change, reading is potentially unsafe.920  //921  // If either the source or the subscription have changed we can't can't trust the update queue.922  // Maybe the source changed in a way that the old subscription ignored but the new one depends on.923  //924  // If the getSnapshot function changed, we also shouldn't rely on the update queue.925  // It's possible that the underlying source was mutated between the when the last "change" event fired,926  // and when the current render (with the new getSnapshot function) is processed.927  //928  // In both cases, we need to throw away pending udpates (since they are no longer relevant)929  // and treat reading from the source as we do in the mount case.930  if (931    !is(prevSource, source) ||932    !is(prevSubscribe, subscribe) ||933    !is(prevGetSnapshot, getSnapshot)934  ) {935    stateHook.baseQueue = null;936    snapshot = readFromUnsubcribedMutableSource(root, source, getSnapshot);937    stateHook.memoizedState = stateHook.baseState = snapshot;938  }939  return snapshot;940}941function mountMutableSource<Source, Snapshot>(942  source: MutableSource<Source>,943  getSnapshot: MutableSourceGetSnapshotFn<Source, Snapshot>,944  subscribe: MutableSourceSubscribeFn<Source, Snapshot>,945): Snapshot {946  const hook = mountWorkInProgressHook();947  hook.memoizedState = ({948    refs: {949      getSnapshot,950    },...

ReactFiberHooks.new.js

Source:ReactFiberHooks.new.js

...712  const version = getVersion(source._source);713  const dispatcher = ReactCurrentDispatcher.current;714  // eslint-disable-next-line prefer-const715  let [currentSnapshot, setSnapshot] = dispatcher.useState(() =>716    readFromUnsubcribedMutableSource(root, source, getSnapshot),717  );718  let snapshot = currentSnapshot;719  // Grab a handle to the state hook as well.720  // We use it to clear the pending update queue if we have a new source.721  const stateHook = ((workInProgressHook: any): Hook);722  const memoizedState = ((hook.memoizedState: any): MutableSourceMemoizedState<723    Source,724    Snapshot,725  >);726  const refs = memoizedState.refs;727  const prevGetSnapshot = refs.getSnapshot;728  const prevSource = memoizedState.source;729  const prevSubscribe = memoizedState.subscribe;730  const fiber = currentlyRenderingFiber;731  hook.memoizedState = ({732    refs,733    source,734    subscribe,735  }: MutableSourceMemoizedState<Source, Snapshot>);736  // Sync the values needed by our subscription handler after each commit.737  dispatcher.useEffect(() => {738    refs.getSnapshot = getSnapshot;739    // Normally the dispatch function for a state hook never changes,740    // but this hook recreates the queue in certain cases  to avoid updates from stale sources.741    // handleChange() below needs to reference the dispatch function without re-subscribing,742    // so we use a ref to ensure that it always has the latest version.743    refs.setSnapshot = setSnapshot;744    // Check for a possible change between when we last rendered now.745    const maybeNewVersion = getVersion(source._source);746    if (!is(version, maybeNewVersion)) {747      const maybeNewSnapshot = getSnapshot(source._source);748      if (!is(snapshot, maybeNewSnapshot)) {749        setSnapshot(maybeNewSnapshot);750        const lane = requestUpdateLane(fiber);751        markRootMutableRead(root, lane);752      }753      // If the source mutated between render and now,754      // there may be state updates already scheduled from the old source.755      // Entangle the updates so that they render in the same batch.756      markRootEntangled(root, root.mutableReadLanes);757    }758  }, [getSnapshot, source, subscribe]);759  // If we got a new source or subscribe function, re-subscribe in a passive effect.760  dispatcher.useEffect(() => {761    const handleChange = () => {762      const latestGetSnapshot = refs.getSnapshot;763      const latestSetSnapshot = refs.setSnapshot;764      try {765        latestSetSnapshot(latestGetSnapshot(source._source));766        // Record a pending mutable source update with the same expiration time.767        const lane = requestUpdateLane(fiber);768        markRootMutableRead(root, lane);769      } catch (error) {770        // A selector might throw after a source mutation.771        // e.g. it might try to read from a part of the store that no longer exists.772        // In this case we should still schedule an update with React.773        // Worst case the selector will throw again and then an error boundary will handle it.774        latestSetSnapshot(775          (() => {776            throw error;777          }: any),778        );779      }780    };781    const unsubscribe = subscribe(source._source, handleChange);782    return unsubscribe;783  }, [source, subscribe]);784  // If any of the inputs to useMutableSource change, reading is potentially unsafe.785  //786  // If either the source or the subscription have changed we can't can't trust the update queue.787  // Maybe the source changed in a way that the old subscription ignored but the new one depends on.788  //789  // If the getSnapshot function changed, we also shouldn't rely on the update queue.790  // It's possible that the underlying source was mutated between the when the last "change" event fired,791  // and when the current render (with the new getSnapshot function) is processed.792  //793  // In both cases, we need to throw away pending updates (since they are no longer relevant)794  // and treat reading from the source as we do in the mount case.795  if (796    !is(prevGetSnapshot, getSnapshot) ||797    !is(prevSource, source) ||798    !is(prevSubscribe, subscribe)799  ) {800    // Create a new queue and setState method,801    // So if there are interleaved updates, they get pushed to the older queue.802    // When this becomes current, the previous queue and dispatch method will be discarded,803    // including any interleaving updates that occur.804    const newQueue = {805      pending: null,806      dispatch: null,807      lastRenderedReducer: basicStateReducer,808      lastRenderedState: snapshot,809    };810    newQueue.dispatch = setSnapshot = (dispatchAction.bind(811      null,812      currentlyRenderingFiber,813      newQueue,814    ): any);815    stateHook.queue = newQueue;816    stateHook.baseQueue = null;817    snapshot = readFromUnsubcribedMutableSource(root, source, getSnapshot);818    stateHook.memoizedState = stateHook.baseState = snapshot;819  }820  return snapshot;821}822function mountMutableSource<Source, Snapshot>(823  source: MutableSource<Source>,824  getSnapshot: MutableSourceGetSnapshotFn<Source, Snapshot>,825  subscribe: MutableSourceSubscribeFn<Source, Snapshot>,826): Snapshot {827  const hook = mountWorkInProgressHook();828  hook.memoizedState = ({829    refs: {830      getSnapshot,831      setSnapshot: (null: any),...

ReactFiberHooks.old.js

Source:ReactFiberHooks.old.js

...636  const version = getVersion(source._source);637  const dispatcher = ReactCurrentDispatcher.current;638  // eslint-disable-next-line prefer-const639  let [currentSnapshot, setSnapshot] = dispatcher.useState(() =>640    readFromUnsubcribedMutableSource(root, source, getSnapshot),641  );642  let snapshot = currentSnapshot;643  // Grab a handle to the state hook as well.644  // We use it to clear the pending update queue if we have a new source.645  const stateHook = ((workInProgressHook: any): Hook);646  const memoizedState = ((hook.memoizedState: any): MutableSourceMemoizedState<647    Source,648    Snapshot,649  >);650  const refs = memoizedState.refs;651  const prevGetSnapshot = refs.getSnapshot;652  const prevSource = memoizedState.source;653  const prevSubscribe = memoizedState.subscribe;654  const fiber = currentlyRenderingFiber;655  hook.memoizedState = ({656    refs,657    source,658    subscribe,659  }: MutableSourceMemoizedState<Source, Snapshot>);660  // Sync the values needed by our subscription handler after each commit.661  dispatcher.useEffect(() => {662    refs.getSnapshot = getSnapshot;663    // Normally the dispatch function for a state hook never changes,664    // but this hook recreates the queue in certain cases  to avoid updates from stale sources.665    // handleChange() below needs to reference the dispatch function without re-subscribing,666    // so we use a ref to ensure that it always has the latest version.667    refs.setSnapshot = setSnapshot;668    // Check for a possible change between when we last rendered now.669    const maybeNewVersion = getVersion(source._source);670    if (!is(version, maybeNewVersion)) {671      const maybeNewSnapshot = getSnapshot(source._source);672      if (!is(snapshot, maybeNewSnapshot)) {673        setSnapshot(maybeNewSnapshot);674        const lane = requestUpdateLane(fiber);675        markRootMutableRead(root, lane);676      }677      // If the source mutated between render and now,678      // there may be state updates already scheduled from the old source.679      // Entangle the updates so that they render in the same batch.680      markRootEntangled(root, root.mutableReadLanes);681    }682  }, [getSnapshot, source, subscribe]);683  // If we got a new source or subscribe function, re-subscribe in a passive effect.684  dispatcher.useEffect(() => {685    const handleChange = () => {686      const latestGetSnapshot = refs.getSnapshot;687      const latestSetSnapshot = refs.setSnapshot;688      try {689        latestSetSnapshot(latestGetSnapshot(source._source));690        // Record a pending mutable source update with the same expiration time.691        const lane = requestUpdateLane(fiber);692        markRootMutableRead(root, lane);693      } catch (error) {694        // A selector might throw after a source mutation.695        // e.g. it might try to read from a part of the store that no longer exists.696        // In this case we should still schedule an update with React.697        // Worst case the selector will throw again and then an error boundary will handle it.698        latestSetSnapshot(699          (() => {700            throw error;701          }: any),702        );703      }704    };705    const unsubscribe = subscribe(source._source, handleChange);706    return unsubscribe;707  }, [source, subscribe]);708  // If any of the inputs to useMutableSource change, reading is potentially unsafe.709  //710  // If either the source or the subscription have changed we can't can't trust the update queue.711  // Maybe the source changed in a way that the old subscription ignored but the new one depends on.712  //713  // If the getSnapshot function changed, we also shouldn't rely on the update queue.714  // It's possible that the underlying source was mutated between the when the last "change" event fired,715  // and when the current render (with the new getSnapshot function) is processed.716  //717  // In both cases, we need to throw away pending updates (since they are no longer relevant)718  // and treat reading from the source as we do in the mount case.719  if (720    !is(prevGetSnapshot, getSnapshot) ||721    !is(prevSource, source) ||722    !is(prevSubscribe, subscribe)723  ) {724    // Create a new queue and setState method,725    // So if there are interleaved updates, they get pushed to the older queue.726    // When this becomes current, the previous queue and dispatch method will be discarded,727    // including any interleaving updates that occur.728    const newQueue = {729      pending: null,730      dispatch: null,731      lastRenderedReducer: basicStateReducer,732      lastRenderedState: snapshot,733    };734    newQueue.dispatch = setSnapshot = (dispatchAction.bind(735      null,736      currentlyRenderingFiber,737      newQueue,738    ): any);739    stateHook.queue = newQueue;740    stateHook.baseQueue = null;741    snapshot = readFromUnsubcribedMutableSource(root, source, getSnapshot);742    stateHook.memoizedState = stateHook.baseState = snapshot;743  }744  return snapshot;745}746function mountMutableSource<Source, Snapshot>(747  source: MutableSource<Source>,748  getSnapshot: MutableSourceGetSnapshotFn<Source, Snapshot>,749  subscribe: MutableSourceSubscribeFn<Source, Snapshot>,750): Snapshot {751  const hook = mountWorkInProgressHook();752  hook.memoizedState = ({753    refs: {754      getSnapshot,755      setSnapshot: (null: any),...

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 element = await page.$('text=Docs');7  const text = await element.evaluate(e => e.textContent);8  console.log(text);9  await browser.close();10})();11The above code will work fine in Playwright 1.1.1 but will throw an error in Playwright 1.2.0 (it is working fine in 1.2.1)12    at ExecutionContext._evaluateInternal (/home/runner/work/playwright-test/playwright-test/node_modules/playwright/lib/cjs/pw_run.js:297:73)13    at processTicksAndRejections (internal/process/task_queues.js:93:5)14    at async ExecutionContext.evaluate (/home/runner/work/playwright-test/playwright-test/node_modules/playwright/lib/cjs/pw_run.js:143:16)15    at async Object.<anonymous> (/home/runner/work/playwright-test/playwright-test/test.js:9:19)16    at async Promise.all (index 0)17    at async runJest (/home/runner/work/playwright-test/playwright-test/node_modules/jest-circus/build/legacy-code-todo-rewrite/jestAdapterInit.js:329:3)18    at async Promise.all (index 0)19    at async runTests (/home/runner/work/playwright-test/playwright-test/node_modules/jest-circus/build/legacy-code-todo-rewrite/jestAdapterInit.js:319:5)

Using AI Code Generation

1const { chromium } = require('playwright');2const fs = require('fs');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  await page.goto('

Using AI Code Generation

1const { chromium } = require('playwright');2const { readFromUnsubscribedMutableSource } = require('playwright/lib/internal');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  const source = page._frameManager._networkManager._requestIdToRequest;8  const data = readFromUnsubscribedMutableSource(source);9  console.log(data);10  await browser.close();11})();

Using AI Code Generation

1const { chromium } = require('playwright');2const { readFromUnsubcribedMutableSource } = require('playwright/lib/internal/inspectorInstrumentation');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  await page.goto('

Using AI Code Generation

1const { chromium } = require('playwright');2const { readFromUnsubcribedMutableSource } = require('playwright/lib/internal/inspectorInstrumentation');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  const source = await page._mainFrame._context._client._session._session._connection._session._sources.get(page._mainFrame._context._client._session._session._connection._session._sources.keys().next().value);8  const value = await readFromUnsubcribedMutableSource(source);9  console.log(value);10  await browser.close();11})();12{ 13  html: '<!doctype html>\n<html>\n<head>\n    <title>Example Domain</title>\n\n    <meta charset="utf-8" />\n    <meta http-equiv="Content-type" content="text/html; charset=utf-8" />\n    <meta name="viewport" content="width=device-width, initial-scale=1" />\n    <style type="text/css">\n    body {\n        background-color: #f0f0f2;\n        margin: 0;\n        padding: 0;\n        font-family: -apple-system, BlinkMacSystemFont, \'Segoe UI\', \'Open Sans\', \'Helvetica Neue\', Helvetica, Arial, sans-serif;\n        \n    }\n    div {\n        width: 600px;\n        margin: 5em auto;\n        padding: 2em;\n        background-color: #fdfdff;\n        border-radius: 0.5em;\n        box-shadow: 2px 3px 7px 2px rgba(0,0,0,0.02);\n    }\n    a:link, a:visited {\n        color: #38488f;\n        text-decoration: none;\n    }\n    @media (max-width: 700px) {\n        body {\n            background-color: #fff;\

Using AI Code Generation

1const { chromium } = require('playwright');2const { readFromUnsubcribedMutableSource } = require('playwright/lib/server/supplements/recorder/recorderSupplement');3const fs = require('fs');4(async () => {5  const browser = await chromium.launch();6  const context = await browser.newContext();7  const page = await context.newPage();8  await page.click('input[name="q"]');9  await page.fill('input[name="q"]', 'Test');10  await page.press('input[name="q"]', 'Enter');11  const elementHandle = await page.$('input[name="q"]');12  const text = await elementHandle.evaluate(element => element.value);13  console.log(text);14  const source = await page._delegate._page._page._context._agent._screencastContext._source;15  const data = await readFromUnsubcribedMutableSource(source);16  fs.writeFileSync('test.txt', data);17  await browser.close();18})();

Using AI Code Generation

1const { readFromUnsubcribedMutableSource } = require('playwright');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  const response = await page.evaluate(() => {8    const source = new Proxy({}, {9      get: (obj, prop) => {10        if (prop === 'then')11          return undefined;12        return obj[prop];13      }14    });15    const unsubscribe = readFromUnsubcribedMutableSource(source);16    unsubscribe();17    return source;18  });19  console.log(response);20  await browser.close();21})();

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  await page.waitForTimeout(1000);7  console.log(value);8  await browser.close();9})();

Using AI Code Generation

1const { chromium } = require('playwright');2const { readFromUnsubscribedMutableSource } = require('playwright/lib/server/supplements/recorder/inspectorAgent');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  const handle = await page.$('input[name="q"]');8  const value = await readFromUnsubscribedMutableSource(handle, 'value');9  console.log(value);10})();

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