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How to use detachFiberMutation method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberCommitWork.new.js

Source:ReactFiberCommitWork.new.js

...1029    node.sibling.return = node.return;1030    node = node.sibling;1031  }1032}1033function detachFiberMutation(fiber: Fiber) {1034  // Cut off the return pointer to disconnect it from the tree.1035  // This enables us to detect and warn against state updates on an unmounted component.1036  // It also prevents events from bubbling from within disconnected components.1037  //1038  // Ideally, we should also clear the child pointer of the parent alternate to let this1039  // get GC:ed but we don't know which for sure which parent is the current1040  // one so we'll settle for GC:ing the subtree of this child.1041  // This child itself will be GC:ed when the parent updates the next time.1042  //1043  // Note that we can't clear child or sibling pointers yet.1044  // They're needed for passive effects and for findDOMNode.1045  // We defer those fields, and all other cleanup, to the passive phase (see detachFiberAfterEffects).1046  const alternate = fiber.alternate;1047  if (alternate !== null) {1048    alternate.return = null;1049    fiber.alternate = null;1050  }1051  fiber.return = null;1052}1053export function detachFiberAfterEffects(fiber: Fiber): void {1054  // Null out fields to improve GC for references that may be lingering (e.g. DevTools).1055  // Note that we already cleared the return pointer in detachFiberMutation().1056  fiber.child = null;1057  fiber.deletions = null;1058  fiber.dependencies = null;1059  fiber.memoizedProps = null;1060  fiber.memoizedState = null;1061  fiber.pendingProps = null;1062  fiber.sibling = null;1063  fiber.stateNode = null;1064  fiber.updateQueue = null;1065  fiber.nextEffect = null;1066  fiber.firstEffect = null;1067  fiber.lastEffect = null;1068  if (__DEV__) {1069    fiber._debugOwner = null;1070  }1071}1072function emptyPortalContainer(current: Fiber) {1073  if (!supportsPersistence) {1074    return;1075  }1076  const portal: {1077    containerInfo: Container,1078    pendingChildren: ChildSet,1079    ...1080  } = current.stateNode;1081  const {containerInfo} = portal;1082  const emptyChildSet = createContainerChildSet(containerInfo);1083  replaceContainerChildren(containerInfo, emptyChildSet);1084}1085function commitContainer(finishedWork: Fiber) {1086  if (!supportsPersistence) {1087    return;1088  }1089  switch (finishedWork.tag) {1090    case ClassComponent:1091    case HostComponent:1092    case HostText:1093    case FundamentalComponent: {1094      return;1095    }1096    case HostRoot:1097    case HostPortal: {1098      const portalOrRoot: {1099        containerInfo: Container,1100        pendingChildren: ChildSet,1101        ...1102      } = finishedWork.stateNode;1103      const {containerInfo, pendingChildren} = portalOrRoot;1104      replaceContainerChildren(containerInfo, pendingChildren);1105      return;1106    }1107  }1108  invariant(1109    false,1110    'This unit of work tag should not have side-effects. This error is ' +1111      'likely caused by a bug in React. Please file an issue.',1112  );1113}1114function getHostParentFiber(fiber: Fiber): Fiber {1115  let parent = fiber.return;1116  while (parent !== null) {1117    if (isHostParent(parent)) {1118      return parent;1119    }1120    parent = parent.return;1121  }1122  invariant(1123    false,1124    'Expected to find a host parent. This error is likely caused by a bug ' +1125      'in React. Please file an issue.',1126  );1127}1128function isHostParent(fiber: Fiber): boolean {1129  return (1130    fiber.tag === HostComponent ||1131    fiber.tag === HostRoot ||1132    fiber.tag === HostPortal1133  );1134}1135function getHostSibling(fiber: Fiber): ?Instance {1136  // We're going to search forward into the tree until we find a sibling host1137  // node. Unfortunately, if multiple insertions are done in a row we have to1138  // search past them. This leads to exponential search for the next sibling.1139  // TODO: Find a more efficient way to do this.1140  let node: Fiber = fiber;1141  siblings: while (true) {1142    // If we didn't find anything, let's try the next sibling.1143    while (node.sibling === null) {1144      if (node.return === null || isHostParent(node.return)) {1145        // If we pop out of the root or hit the parent the fiber we are the1146        // last sibling.1147        return null;1148      }1149      node = node.return;1150    }1151    node.sibling.return = node.return;1152    node = node.sibling;1153    while (1154      node.tag !== HostComponent &&1155      node.tag !== HostText &&1156      node.tag !== DehydratedFragment1157    ) {1158      // If it is not host node and, we might have a host node inside it.1159      // Try to search down until we find one.1160      if (node.flags & Placement) {1161        // If we don't have a child, try the siblings instead.1162        continue siblings;1163      }1164      // If we don't have a child, try the siblings instead.1165      // We also skip portals because they are not part of this host tree.1166      if (node.child === null || node.tag === HostPortal) {1167        continue siblings;1168      } else {1169        node.child.return = node;1170        node = node.child;1171      }1172    }1173    // Check if this host node is stable or about to be placed.1174    if (!(node.flags & Placement)) {1175      // Found it!1176      return node.stateNode;1177    }1178  }1179}1180function commitPlacement(finishedWork: Fiber): void {1181  if (!supportsMutation) {1182    return;1183  }1184  // Recursively insert all host nodes into the parent.1185  const parentFiber = getHostParentFiber(finishedWork);1186  // Note: these two variables *must* always be updated together.1187  let parent;1188  let isContainer;1189  const parentStateNode = parentFiber.stateNode;1190  switch (parentFiber.tag) {1191    case HostComponent:1192      parent = parentStateNode;1193      isContainer = false;1194      break;1195    case HostRoot:1196      parent = parentStateNode.containerInfo;1197      isContainer = true;1198      break;1199    case HostPortal:1200      parent = parentStateNode.containerInfo;1201      isContainer = true;1202      break;1203    case FundamentalComponent:1204      if (enableFundamentalAPI) {1205        parent = parentStateNode.instance;1206        isContainer = false;1207      }1208    // eslint-disable-next-line-no-fallthrough1209    default:1210      invariant(1211        false,1212        'Invalid host parent fiber. This error is likely caused by a bug ' +1213          'in React. Please file an issue.',1214      );1215  }1216  if (parentFiber.flags & ContentReset) {1217    // Reset the text content of the parent before doing any insertions1218    resetTextContent(parent);1219    // Clear ContentReset from the effect tag1220    parentFiber.flags &= ~ContentReset;1221  }1222  const before = getHostSibling(finishedWork);1223  // We only have the top Fiber that was inserted but we need to recurse down its1224  // children to find all the terminal nodes.1225  if (isContainer) {1226    insertOrAppendPlacementNodeIntoContainer(finishedWork, before, parent);1227  } else {1228    insertOrAppendPlacementNode(finishedWork, before, parent);1229  }1230}1231function insertOrAppendPlacementNodeIntoContainer(1232  node: Fiber,1233  before: ?Instance,1234  parent: Container,1235): void {1236  const {tag} = node;1237  const isHost = tag === HostComponent || tag === HostText;1238  if (isHost || (enableFundamentalAPI && tag === FundamentalComponent)) {1239    const stateNode = isHost ? node.stateNode : node.stateNode.instance;1240    if (before) {1241      insertInContainerBefore(parent, stateNode, before);1242    } else {1243      appendChildToContainer(parent, stateNode);1244    }1245  } else if (tag === HostPortal) {1246    // If the insertion itself is a portal, then we don't want to traverse1247    // down its children. Instead, we'll get insertions from each child in1248    // the portal directly.1249  } else {1250    const child = node.child;1251    if (child !== null) {1252      insertOrAppendPlacementNodeIntoContainer(child, before, parent);1253      let sibling = child.sibling;1254      while (sibling !== null) {1255        insertOrAppendPlacementNodeIntoContainer(sibling, before, parent);1256        sibling = sibling.sibling;1257      }1258    }1259  }1260}1261function insertOrAppendPlacementNode(1262  node: Fiber,1263  before: ?Instance,1264  parent: Instance,1265): void {1266  const {tag} = node;1267  const isHost = tag === HostComponent || tag === HostText;1268  if (isHost || (enableFundamentalAPI && tag === FundamentalComponent)) {1269    const stateNode = isHost ? node.stateNode : node.stateNode.instance;1270    if (before) {1271      insertBefore(parent, stateNode, before);1272    } else {1273      appendChild(parent, stateNode);1274    }1275  } else if (tag === HostPortal) {1276    // If the insertion itself is a portal, then we don't want to traverse1277    // down its children. Instead, we'll get insertions from each child in1278    // the portal directly.1279  } else {1280    const child = node.child;1281    if (child !== null) {1282      insertOrAppendPlacementNode(child, before, parent);1283      let sibling = child.sibling;1284      while (sibling !== null) {1285        insertOrAppendPlacementNode(sibling, before, parent);1286        sibling = sibling.sibling;1287      }1288    }1289  }1290}1291function unmountHostComponents(1292  finishedRoot: FiberRoot,1293  current: Fiber,1294  renderPriorityLevel: ReactPriorityLevel,1295): void {1296  // We only have the top Fiber that was deleted but we need to recurse down its1297  // children to find all the terminal nodes.1298  let node: Fiber = current;1299  // Each iteration, currentParent is populated with node's host parent if not1300  // currentParentIsValid.1301  let currentParentIsValid = false;1302  // Note: these two variables *must* always be updated together.1303  let currentParent;1304  let currentParentIsContainer;1305  while (true) {1306    if (!currentParentIsValid) {1307      let parent = node.return;1308      findParent: while (true) {1309        invariant(1310          parent !== null,1311          'Expected to find a host parent. This error is likely caused by ' +1312            'a bug in React. Please file an issue.',1313        );1314        const parentStateNode = parent.stateNode;1315        switch (parent.tag) {1316          case HostComponent:1317            currentParent = parentStateNode;1318            currentParentIsContainer = false;1319            break findParent;1320          case HostRoot:1321            currentParent = parentStateNode.containerInfo;1322            currentParentIsContainer = true;1323            break findParent;1324          case HostPortal:1325            currentParent = parentStateNode.containerInfo;1326            currentParentIsContainer = true;1327            break findParent;1328          case FundamentalComponent:1329            if (enableFundamentalAPI) {1330              currentParent = parentStateNode.instance;1331              currentParentIsContainer = false;1332            }1333        }1334        parent = parent.return;1335      }1336      currentParentIsValid = true;1337    }1338    if (node.tag === HostComponent || node.tag === HostText) {1339      commitNestedUnmounts(finishedRoot, node, renderPriorityLevel);1340      // After all the children have unmounted, it is now safe to remove the1341      // node from the tree.1342      if (currentParentIsContainer) {1343        removeChildFromContainer(1344          ((currentParent: any): Container),1345          (node.stateNode: Instance | TextInstance),1346        );1347      } else {1348        removeChild(1349          ((currentParent: any): Instance),1350          (node.stateNode: Instance | TextInstance),1351        );1352      }1353      // Don't visit children because we already visited them.1354    } else if (enableFundamentalAPI && node.tag === FundamentalComponent) {1355      const fundamentalNode = node.stateNode.instance;1356      commitNestedUnmounts(finishedRoot, node, renderPriorityLevel);1357      // After all the children have unmounted, it is now safe to remove the1358      // node from the tree.1359      if (currentParentIsContainer) {1360        removeChildFromContainer(1361          ((currentParent: any): Container),1362          (fundamentalNode: Instance),1363        );1364      } else {1365        removeChild(1366          ((currentParent: any): Instance),1367          (fundamentalNode: Instance),1368        );1369      }1370    } else if (1371      enableSuspenseServerRenderer &&1372      node.tag === DehydratedFragment1373    ) {1374      if (enableSuspenseCallback) {1375        const hydrationCallbacks = finishedRoot.hydrationCallbacks;1376        if (hydrationCallbacks !== null) {1377          const onDeleted = hydrationCallbacks.onDeleted;1378          if (onDeleted) {1379            onDeleted((node.stateNode: SuspenseInstance));1380          }1381        }1382      }1383      // Delete the dehydrated suspense boundary and all of its content.1384      if (currentParentIsContainer) {1385        clearSuspenseBoundaryFromContainer(1386          ((currentParent: any): Container),1387          (node.stateNode: SuspenseInstance),1388        );1389      } else {1390        clearSuspenseBoundary(1391          ((currentParent: any): Instance),1392          (node.stateNode: SuspenseInstance),1393        );1394      }1395    } else if (node.tag === HostPortal) {1396      if (node.child !== null) {1397        // When we go into a portal, it becomes the parent to remove from.1398        // We will reassign it back when we pop the portal on the way up.1399        currentParent = node.stateNode.containerInfo;1400        currentParentIsContainer = true;1401        // Visit children because portals might contain host components.1402        node.child.return = node;1403        node = node.child;1404        continue;1405      }1406    } else {1407      commitUnmount(finishedRoot, node, renderPriorityLevel);1408      // Visit children because we may find more host components below.1409      if (node.child !== null) {1410        node.child.return = node;1411        node = node.child;1412        continue;1413      }1414    }1415    if (node === current) {1416      return;1417    }1418    while (node.sibling === null) {1419      if (node.return === null || node.return === current) {1420        return;1421      }1422      node = node.return;1423      if (node.tag === HostPortal) {1424        // When we go out of the portal, we need to restore the parent.1425        // Since we don't keep a stack of them, we will search for it.1426        currentParentIsValid = false;1427      }1428    }1429    node.sibling.return = node.return;1430    node = node.sibling;1431  }1432}1433function commitDeletion(1434  finishedRoot: FiberRoot,1435  current: Fiber,1436  renderPriorityLevel: ReactPriorityLevel,1437): void {1438  if (supportsMutation) {1439    // Recursively delete all host nodes from the parent.1440    // Detach refs and call componentWillUnmount() on the whole subtree.1441    unmountHostComponents(finishedRoot, current, renderPriorityLevel);1442  } else {1443    // Detach refs and call componentWillUnmount() on the whole subtree.1444    commitNestedUnmounts(finishedRoot, current, renderPriorityLevel);1445  }1446  const alternate = current.alternate;1447  detachFiberMutation(current);1448  if (alternate !== null) {1449    detachFiberMutation(alternate);1450  }1451}1452function commitWork(current: Fiber | null, finishedWork: Fiber): void {1453  if (!supportsMutation) {1454    switch (finishedWork.tag) {1455      case FunctionComponent:1456      case ForwardRef:1457      case MemoComponent:1458      case SimpleMemoComponent: {1459        // Layout effects are destroyed during the mutation phase so that all1460        // destroy functions for all fibers are called before any create functions.1461        // This prevents sibling component effects from interfering with each other,1462        // e.g. a destroy function in one component should never override a ref set1463        // by a create function in another component during the same commit....

ReactFiberCommitWork.old.js

Source:ReactFiberCommitWork.old.js

...507      node.sibling.return = node.return;508      node = node.sibling;509    }510  }511  function detachFiberMutation(fiber) {512    // Cut off the return pointers to disconnect it from the tree. Ideally, we513    // should clear the child pointer of the parent alternate to let this514    // get GC:ed but we don't know which for sure which parent is the current515    // one so we'll settle for GC:ing the subtree of this child. This child516    // itself will be GC:ed when the parent updates the next time.517    // Note: we cannot null out sibling here, otherwise it can cause issues518    // with findDOMNode and how it requires the sibling field to carry out519    // traversal in a later effect. See PR #16820. We now clear the sibling520    // field after effects, see: detachFiberAfterEffects.521    //522    // Don't disconnect stateNode now; it will be detached in detachFiberAfterEffects.523    // It may be required if the current component is an error boundary,524    // and one of its descendants throws while unmounting a passive effect.525    fiber.alternate = null;526    fiber.child = null;527    fiber.dependencies = null;528    fiber.firstEffect = null;529    fiber.lastEffect = null;530    fiber.memoizedProps = null;531    fiber.memoizedState = null;532    fiber.pendingProps = null;533    fiber.return = null;534    fiber.updateQueue = null;535    {536      fiber._debugOwner = null;537    }538  }539  function getHostParentFiber(fiber) {540    var parent = fiber.return;541    while (parent !== null) {542      if (isHostParent(parent)) {543        return parent;544      }545      parent = parent.return;546    }547    {548      {549        throw Error( "Expected to find a host parent. This error is likely caused by a bug in React. Please file an issue." );550      }551    }552  }553  function isHostParent(fiber) {554    return fiber.tag === HostComponent || fiber.tag === HostRoot || fiber.tag === HostPortal;555  }556  function getHostSibling(fiber) {557    // We're going to search forward into the tree until we find a sibling host558    // node. Unfortunately, if multiple insertions are done in a row we have to559    // search past them. This leads to exponential search for the next sibling.560    // TODO: Find a more efficient way to do this.561    var node = fiber;562    siblings: while (true) {563      // If we didn't find anything, let's try the next sibling.564      while (node.sibling === null) {565        if (node.return === null || isHostParent(node.return)) {566          // If we pop out of the root or hit the parent the fiber we are the567          // last sibling.568          return null;569        }570        node = node.return;571      }572      node.sibling.return = node.return;573      node = node.sibling;574      while (node.tag !== HostComponent && node.tag !== HostText && node.tag !== DehydratedFragment) {575        // If it is not host node and, we might have a host node inside it.576        // Try to search down until we find one.577        if (node.flags & Placement) {578          // If we don't have a child, try the siblings instead.579          continue siblings;580        } // If we don't have a child, try the siblings instead.581        // We also skip portals because they are not part of this host tree.582        if (node.child === null || node.tag === HostPortal) {583          continue siblings;584        } else {585          node.child.return = node;586          node = node.child;587        }588      } // Check if this host node is stable or about to be placed.589      if (!(node.flags & Placement)) {590        // Found it!591        return node.stateNode;592      }593    }594  }595  function commitPlacement(finishedWork) {596    var parentFiber = getHostParentFiber(finishedWork); // Note: these two variables *must* always be updated together.597    var parent;598    var isContainer;599    var parentStateNode = parentFiber.stateNode;600    switch (parentFiber.tag) {601      case HostComponent:602        parent = parentStateNode;603        isContainer = false;604        break;605      case HostRoot:606        parent = parentStateNode.containerInfo;607        isContainer = true;608        break;609      case HostPortal:610        parent = parentStateNode.containerInfo;611        isContainer = true;612        break;613      case FundamentalComponent:614      // eslint-disable-next-line-no-fallthrough615      default:616        {617          {618            throw Error( "Invalid host parent fiber. This error is likely caused by a bug in React. Please file an issue." );619          }620        }621    }622    if (parentFiber.flags & ContentReset) {623      // Reset the text content of the parent before doing any insertions624      resetTextContent(parent); // Clear ContentReset from the effect tag625      parentFiber.flags &= ~ContentReset;626    }627    var before = getHostSibling(finishedWork); // We only have the top Fiber that was inserted but we need to recurse down its628    // children to find all the terminal nodes.629    if (isContainer) {630      insertOrAppendPlacementNodeIntoContainer(finishedWork, before, parent);631    } else {632      insertOrAppendPlacementNode(finishedWork, before, parent);633    }634  }635  function insertOrAppendPlacementNodeIntoContainer(node, before, parent) {636    var tag = node.tag;637    var isHost = tag === HostComponent || tag === HostText;638    if (isHost || enableFundamentalAPI ) {639      var stateNode = isHost ? node.stateNode : node.stateNode.instance;640      if (before) {641        insertInContainerBefore(parent, stateNode, before);642      } else {643        appendChildToContainer(parent, stateNode);644      }645    } else if (tag === HostPortal) ; else {646      var child = node.child;647      if (child !== null) {648        insertOrAppendPlacementNodeIntoContainer(child, before, parent);649        var sibling = child.sibling;650        while (sibling !== null) {651          insertOrAppendPlacementNodeIntoContainer(sibling, before, parent);652          sibling = sibling.sibling;653        }654      }655    }656  }657  function insertOrAppendPlacementNode(node, before, parent) {658    var tag = node.tag;659    var isHost = tag === HostComponent || tag === HostText;660    if (isHost || enableFundamentalAPI ) {661      var stateNode = isHost ? node.stateNode : node.stateNode.instance;662      if (before) {663        insertBefore(parent, stateNode, before);664      } else {665        appendChild(parent, stateNode);666      }667    } else if (tag === HostPortal) ; else {668      var child = node.child;669      if (child !== null) {670        insertOrAppendPlacementNode(child, before, parent);671        var sibling = child.sibling;672        while (sibling !== null) {673          insertOrAppendPlacementNode(sibling, before, parent);674          sibling = sibling.sibling;675        }676      }677    }678  }679  function unmountHostComponents(finishedRoot, current, renderPriorityLevel) {680    // We only have the top Fiber that was deleted but we need to recurse down its681    // children to find all the terminal nodes.682    var node = current; // Each iteration, currentParent is populated with node's host parent if not683    // currentParentIsValid.684    var currentParentIsValid = false; // Note: these two variables *must* always be updated together.685    var currentParent;686    var currentParentIsContainer;687    while (true) {688      if (!currentParentIsValid) {689        var parent = node.return;690        findParent: while (true) {691          if (!(parent !== null)) {692            {693              throw Error( "Expected to find a host parent. This error is likely caused by a bug in React. Please file an issue." );694            }695          }696          var parentStateNode = parent.stateNode;697          switch (parent.tag) {698            case HostComponent:699              currentParent = parentStateNode;700              currentParentIsContainer = false;701              break findParent;702            case HostRoot:703              currentParent = parentStateNode.containerInfo;704              currentParentIsContainer = true;705              break findParent;706            case HostPortal:707              currentParent = parentStateNode.containerInfo;708              currentParentIsContainer = true;709              break findParent;710          }711          parent = parent.return;712        }713        currentParentIsValid = true;714      }715      if (node.tag === HostComponent || node.tag === HostText) {716        commitNestedUnmounts(finishedRoot, node); // After all the children have unmounted, it is now safe to remove the717        // node from the tree.718        if (currentParentIsContainer) {719          removeChildFromContainer(currentParent, node.stateNode);720        } else {721          removeChild(currentParent, node.stateNode);722        } // Don't visit children because we already visited them.723      } else if ( node.tag === DehydratedFragment) {724        if (currentParentIsContainer) {725          clearSuspenseBoundaryFromContainer(currentParent, node.stateNode);726        } else {727          clearSuspenseBoundary(currentParent, node.stateNode);728        }729      } else if (node.tag === HostPortal) {730        if (node.child !== null) {731          // When we go into a portal, it becomes the parent to remove from.732          // We will reassign it back when we pop the portal on the way up.733          currentParent = node.stateNode.containerInfo;734          currentParentIsContainer = true; // Visit children because portals might contain host components.735          node.child.return = node;736          node = node.child;737          continue;738        }739      } else {740        commitUnmount(finishedRoot, node); // Visit children because we may find more host components below.741        if (node.child !== null) {742          node.child.return = node;743          node = node.child;744          continue;745        }746      }747      if (node === current) {748        return;749      }750      while (node.sibling === null) {751        if (node.return === null || node.return === current) {752          return;753        }754        node = node.return;755        if (node.tag === HostPortal) {756          // When we go out of the portal, we need to restore the parent.757          // Since we don't keep a stack of them, we will search for it.758          currentParentIsValid = false;759        }760      }761      node.sibling.return = node.return;762      node = node.sibling;763    }764  }765  function commitDeletion(finishedRoot, current, renderPriorityLevel) {766    {767      // Recursively delete all host nodes from the parent.768      // Detach refs and call componentWillUnmount() on the whole subtree.769      unmountHostComponents(finishedRoot, current);770    }771    var alternate = current.alternate;772    detachFiberMutation(current);773    if (alternate !== null) {774      detachFiberMutation(alternate);775    }776  }777  function commitWork(current, finishedWork) {778    switch (finishedWork.tag) {779      case FunctionComponent:780      case ForwardRef:781      case MemoComponent:782      case SimpleMemoComponent:783      case Block:784        {785          // Layout effects are destroyed during the mutation phase so that all786          // destroy functions for all fibers are called before any create functions.787          // This prevents sibling component effects from interfering with each other,788          // e.g. a destroy function in one component should never override a ref set...

FiberCommitWork.js

Source:FiberCommitWork.js

...403        node.sibling.return = node.return;404        node = node.sibling;405    }406}407function detachFiberMutation(fiber){408    const alternate = fiber.alternate;409    if (alternate !== null){410        alternate.return = null;411    }412    fiber.return = null;413}414function detachFiberAfterEffects(fiber){415    const alternate = fiber.alternate;416    if (alternate !== null){417        fiber.alternate = null;418        detachFiberAfterEffects(alternate);419    }420    fiber.child = null;421    fiber.deletions = null;422    fiber.sibling = null;423    if (fiber.tag === HostComponent){424        if(fiber.stateNode !== null){425            detachDeletedInstance(fiber.stateNode);426        }427    }428    fiber.stateNode = null;429}430function toggleAllChildren(finishedWork, isHidden){431  let hostSubtreeRoot = null;432  let node = finishedWork;433  while(true){434    if (node.tag === HostComponent){435      if(hostSubtreeRoot === null){436        hostSubtreeRoot = node;437        const instance = node.stateNode;438        if (isHidden){439          const style = instance.style;440          if(typeof style.setProperty === 'function'){441            style.setProperty('display', 'none', 'important');442          } else {443            style.display = 'none';444          }445        } else {446          instance.style.removeProperty('display');447        }448      }449    } else if (node.tag === HostText){450      if(hostSubtreeRoot === null){451        const instance = node.stateNode;452        if (isHidden){453            instance.nodeValue ='';454        } else {455            instance.nodeValue = node.memoizedProps;456        }457      }458    } else if(459      node.tag === OffscreenComponent &&460      node.memoizedState !== null &&461      node !== finishedWork462    ){463      debugger;464    } else if (node.child !== null){465        node.child.return = node;466        node = node.child;467        continue;468    }469    if (node == finishedWork){470        return;471    }472    while(node.sibling === null){473      if (node.return === null || node.return === finishedWork){474        return;475      }476      if(hostSubtreeRoot === node){477        hostSubtreeRoot = null;478      }479      node = node.return;480    }481    if(hostSubtreeRoot === node){482      hostSubtreeRoot = null;483    }484    node.sibling.return = node.return;485    node = node.sibling;486  }487}488function getHostParentFiber(fiber){489    let parent = fiber.return;490    while (parent!== null){491        if (isHostParent(parent)){492            return parent;493        }494        parent = parent.return;495    }496}497function isHostParent(fiber){498    return (499        fiber.tag === HostRoot ||500        fiber.tag === HostComponent501        );502}503function getHostSibling(fiber){504    let node = fiber;505    siblings: while (true){506        while(node.sibling === null){507            if (node.return === null || isHostParent(node.return)){508                return null;509            }510            node = node.return;511        }512        node.sibling.return = node.return;513        node = node.sibling;514        while (515            node.tag !== HostComponent &&516            node.tag !== HostText517        ){518            if (node.flags & Placement){519                continue siblings;520            }521            if (node.child === null){522                continue siblings;523            } else {524                node.child.return = node;525                node = node.child;526            }527        }528        if (!(node.flags & Placement)){529            return node.stateNode;530        }531    }532}533function commitPlacement(finishedWork){534    const parentFiber = getHostParentFiber(finishedWork);535    let parent;536    let isContainer;537    const parentStateNode = parentFiber.stateNode;538    switch(parentFiber.tag){539        case HostComponent:540            parent = parentStateNode;541            isContainer = false;542            break;543        case HostRoot:544            parent = parentStateNode.container;545            isContainer = true;546            break;547        default:548            console.error('Unknown parentFiber', parentFiber.tag);549    }550    const before = getHostSibling(finishedWork);551    if(isContainer){552        insertOrAppendPlacementNodeIntoContainer(finishedWork, before, parent);553    } else {554        insertOrAppendPlacementNode(finishedWork, before, parent);555    }556}557function insertOrAppendPlacementNodeIntoContainer(node, before, parent){558    const tag = node.tag;559    const isHost = tag === HostComponent || tag === HostText;560    if (isHost){561        const stateNode =node.stateNode;562        if (before){563            parent.insertBefore(stateNode, before)564        } else {565            parent.append(stateNode);566        }567    } else {568        const child = node.child;569        if (child !== null){570            insertOrAppendPlacementNodeIntoContainer(child, before, parent);571            let sibling = child.sibling;572            while (sibling !== null ){573                insertOrAppendPlacementNodeIntoContainer(574                    sibling, 575                    before, 576                parent);577                sibling = sibling.sibling;578            }579        }580    }581}582function insertOrAppendPlacementNode(node, before, parent){583    const tag = node.tag;584    const isHost = tag === HostComponent || tag === HostText;585    if (isHost){586        const stateNode = node.stateNode;587        if (before){588            parent.insertBefore(stateNode, before);589        } else {590            parent.append(stateNode);591        }592    } else {593        const child = node.child;594        if(child !== null){595            insertOrAppendPlacementNode(child, before, parent);596            let sibling = child.sibling;597            while(sibling !== null){598                insertOrAppendPlacementNode(sibling, before, parent);599                sibling = sibling.sibling;600            }601        }602    }603}604function unmountHostComponents(finishedRoot, current, nearestMountedAncestor){605    let node = current;606    let currentParentIsValid = false;607    let currentParent;608    let currentParentIsContainer;609    while(true){610        if (!currentParentIsValid){611            let parent = node.return;612            findParent: while(true){613                const parentStateNode = parent.stateNode;614                switch(parent.tag){615                    case HostComponent:616                        currentParent = parentStateNode;617                        currentParentIsContainer = false;618                        break findParent;619                    case HostRoot:620                        currentParent = parentStateNode.container;621                        currentParentIsContainer = true;622                        break findParent;623                }624                parent = parent.return;625            }626            currentParentIsValid = true;627        }628        if (node.tag === HostComponent || node.tag === HostText){629            commitNestedUnmounts(finishedRoot, node, nearestMountedAncestor);630            currentParent.removeChild(node.stateNode);631        } else {632            commitUnmount(finishedRoot, node, nearestMountedAncestor);633            if (node.child !== null){634                node.child.return = node;635                node = node.child;636                continue;637            }638        }639        if (node === current){640            return;641        }642        while (node.sibling === null){643            if (node.return === null || node.return === current){644                return;645            }646            node = node.return;647        }648        node.sibling.return = node.return;649        node = node.sibling;650    }651}652function commitDeletion(finishedRoot, current, nearestMountedAncestor){653    unmountHostComponents(finishedRoot, current, nearestMountedAncestor);654    detachFiberMutation(current);655}656function commitWork(current, finishedWork){657  switch(finishedWork.tag){658    case HostComponent:{659      const instance = finishedWork.stateNode;660      if (instance !== null){661        const newProps = finishedWork.memoizedProps;662        const oldProps = current !== null ? current.memoizedProps : newProps;663        const type = finishedWork.type;664        const updatePayload = finishedWork.updateQueue;665        finishedWork.updateQueue = null;666        if (updatePayload !== null){667          commitUpdate(668            instance,...

ReactFiberCommitWork.js

Source:ReactFiberCommitWork.js

...355};356const commitDeletion = (finishedRoot, current, renderPriorityLevel) => {357  unmountHostComponents(finishedRoot, current, renderPriorityLevel);358  const alternate = current.alternate;359  detachFiberMutation(current);360  if (alternate !== null) {361    detachFiberMutation(alternate);362  }363};364export {365  isSuspenseBoundaryBeingHidden,366  commitBeforeMutationLifeCycles,367  commitResetTextContent,368  commitDetachRef,369  commitPlacement,370  commitWork,371  commitDeletion,...

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.fill('input[title="Search"]', 'Playwright');7  await page.click('text=Google Search');8  await page.waitForSelector('text=Playwright');9  const elementHandle = await page.$('text=Playwright');10  const element = await elementHandle._client.send('DOM.describeNode', { objectId: elementHandle._remoteObject.objectId });11  await page._delegate._connection._session.send('DOM.detachFiberMutation', { nodeId: element.nodeId });12  await page.click('text=Playwright');13  await page.waitForSelector('text=Playwright');14  await page.waitForTimeout(5000);15  await page.close();16  await context.close();17  await browser.close();18})();

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.waitForSelector('text=Get started');7  await page.click('text=Get started');8  await page.waitForSelector('text=API reference');9  const element = await page.$('text=API reference');10  await element._delegate.detachFiberMutation();11  await page.waitForSelector('text=API reference');12  await browser.close();13})();

Using AI Code Generation

1const playwright = require("playwright");2(async () => {3  const browser = await playwright.chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  const elementHandle = await page.$("text=Docs");7  await elementHandle.evaluate((element) => {8    element.detachFiberMutation();9  });10  await page.screenshot({ path: "example.png" });11  await browser.close();12})();13const { devices } = require("playwright");14module.exports = {15    {16      use: {17        viewport: { width: 1920, height: 1080 },18          "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36",19      },20    },21    {22      use: {23      },24    },25};26{27  "scripts": {28  },29  "devDependencies": {30  }31}32const playwright = require("playwright");33(async () => {34  const browser = await playwright.chromium.launch();35  const context = await browser.newContext();36  const page = await context.newPage();37  const elementHandle = await page.$("text=Docs");38  await elementHandle.evaluate((element) => {39    element.detachFiberMutation();40  });41  await page.screenshot({ path: "example.png" });42  await browser.close();43})();44const { devices } = require("playwright");45module.exports = {46    {47      use: {48        viewport: { width: 1920, height: 1080 },49          "Mozilla/5.0 (

Using AI Code Generation

1const { detachFiberMutation } = require('playwright/lib/server/fiber');2const { attachFiberMutation } = require('playwright/lib/server/fiber');3detachFiberMutation();4attachFiberMutation();5detachFiberMutation();6attachFiberMutation();7detachFiberMutation();8attachFiberMutation();9detachFiberMutation();10attachFiberMutation();11detachFiberMutation();12attachFiberMutation();13detachFiberMutation();14attachFiberMutation();15detachFiberMutation();16attachFiberMutation();17detachFiberMutation();18attachFiberMutation();19detachFiberMutation();20attachFiberMutation();21detachFiberMutation();22attachFiberMutation();23detachFiberMutation();24attachFiberMutation();

Using AI Code Generation

1const { chromium } = require('playwright');2const { detachFiberMutation } = require('playwright/lib/internal/recorder/recorderUtils');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  await page.click('input[type="text"]', {force: true});7  await page.type('input[type="text"]', 'Hello World');8  await page.keyboard.press('Enter');9  await page.waitForSelector('text="Hello World"');10  const elementHandle = await page.$('text="Hello World"');11  await elementHandle.click();12  await page.screenshot({ path: 'screenshot.png' });13  await browser.close();14})();15const { chromium } = require('playwright');16const { detachFiberMutation } = require('playwright/lib/internal/recorder/recorderUtils');17(async () => {18  const browser = await chromium.launch();19  const page = await browser.newPage();20  await page.click('input[type="text"]', {force: true});21  await page.type('input[type="text"]', 'Hello World');22  await page.keyboard.press('Enter');23  await page.waitForSelector('text="Hello World"');24  const elementHandle = await page.$('text="Hello World"');25  await elementHandle.click();26  await page.screenshot({ path: 'screenshot.png' });27  await browser.close();28})();29const { chromium } = require('playwright');30const { detachFiberMutation } = require('playwright/lib/internal/recorder/recorderUtils');31(async () => {32  const browser = await chromium.launch();33  const page = await browser.newPage();34  await page.click('input[type="text"]', {force: true});35  await page.type('input[type="text"]', 'Hello World');36  await page.keyboard.press('Enter');37  await page.waitForSelector('text="Hello World"');38  const elementHandle = await page.$('text="Hello World"');39  await elementHandle.click();40  await page.screenshot({ path: 'screenshot

Using AI Code Generation

1const { attachFiberMutation, detachFiberMutation } = require('playwright/lib/server/dom.js');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  await attachFiberMutation(page);8  await detachFiberMutation(page);9  await browser.close();10})();11const { test, expect } = require('@playwright/test');12test('testing', async ({ page }) => {13  await page.evaluate(() => {14    document.querySelector('text=Get started').click();15  });16  await page.waitForSelector('text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API.');17  const element = await page.$('text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API.');18  const text = await element.evaluate(node => node.textContent);19  expect(text).toBe('Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API.');20});21    Error: Protocol error (Runtime.callFunctionOn): Cannot find context with specified id undefined

Using AI Code Generation

1const { attachFiberMutation, detachFiberMutation } = require('playwright/lib/server/fiber');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  await page.waitForSelector('text=Learn more');8  await page.click('text=Learn more');9  await page.waitForSelector('text=Getting started');10  await page.click('text=Getting started');11  await page.waitForSelector('text=Playwright is a Node library to automate');12  await page.evaluate(() => {13    const h1 = document.querySelector('h1');14    const h2 = document.querySelector('h2');15    const h3 = document.querySelector('h3');16    const h4 = document.querySelector('h4');17    const h5 = document.querySelector('h5');18    const h6 = document.querySelector('h6');19    const p = document.querySelector('p');20    const div = document.querySelector('div');21    const span = document.querySelector('span');22    const a = document.querySelector('a');23    attachFiberMutation(h1);24    attachFiberMutation(h2);25    attachFiberMutation(h3);26    attachFiberMutation(h4);27    attachFiberMutation(h5);28    attachFiberMutation(h6);29    attachFiberMutation(p);30    attachFiberMutation(div);31    attachFiberMutation(span);32    attachFiberMutation(a);33    detachFiberMutation(h1);34    detachFiberMutation(h2);35    detachFiberMutation(h3);36    detachFiberMutation(h4);37    detachFiberMutation(h5);38    detachFiberMutation(h6);39    detachFiberMutation(p);40    detachFiberMutation(div);41    detachFiberMutation(span);42    detachFiberMutation(a);43  });44  await browser.close();45})();

Using AI Code Generation

1const { Playwright } = require('playwright');2const { detachFiberMutation } = Playwright.internal;3const { chromium } = require('playwright-chromium');4(async () => {5  const browser = await chromium.launch();6  const context = await browser.newContext();7  const page = await context.newPage();8  await page.waitForTimeout(1000);9  await detachFiberMutation();10  await page.screenshot({ path: 'example.png' });11  await browser.close();12})();13const { Playwright } = require('playwright');14const { detachFiberMutation } = Playwright.internal;15const { chromium } = require('playwright-chromium');16(async () => {17  const browser = await chromium.launch();18  const context = await browser.newContext();19  const page = await context.newPage();20  await page.waitForTimeout(1000);21  await detachFiberMutation();22  await page.screenshot({ path: 'example.png' });23  await browser.close();24})();25const { Playwright } = require('playwright');26const { detachFiberMutation } = Playwright.internal;27const { chromium } = require('playwright-chromium');28(async () => {29  const browser = await chromium.launch();30  const context = await browser.newContext();31  const page = await context.newPage();32  await page.waitForTimeout(1000);33  await detachFiberMutation();34  await page.screenshot({ path: 'example.png' });35  await browser.close();36})();37const { Playwright } = require('playwright');38const { detachFiberMutation } = Playwright.internal;39const { chromium } = require('playwright-chromium');40(async () => {41  const browser = await chromium.launch();42  const context = await browser.newContext();43  const page = await context.newPage();44  await page.waitForTimeout(1000);45  await detachFiberMutation();46  await page.screenshot({ path: '

Using AI Code Generation

1const { detachFiberMutation } = require('playwright/lib/utils/attachToFrames');2const { chromium } = require('playwright');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.waitForLoadState('domcontentloaded');9  const handle = await page.$('text="API"');10  const content = await handle.textContent();11  await page.screenshot({ path: `example.png` });12  console.log(content);13  await detachFiberMutation();14  await browser.close();15})();

Using AI Code Generation

1const { chromium } = require('playwright');2const { detachFiberMutation } = require('playwright/lib/server/dom');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  const fiber = await page.evaluateHandle(() => {8    const fiber = document.createElement('div');9    fiber.id = 'fiber';10    fiber.style.width = '100px';11    fiber.style.height = '100px';12    fiber.style.backgroundColor = 'red';13    document.body.appendChild(fiber);14    return fiber;15  });16  await page.evaluate(detachFiberMutation, fiber);17  await fiber.click();18  await browser.close();19})();20const { chromium } = require('playwright');21const { detachFiberMutation } = require('playwright/lib/server/dom');22(async () => {23  const browser = await chromium.launch();24  const context = await browser.newContext();25  const page = await context.newPage();26  const fiber = await page.evaluateHandle(() => {27    const fiber = document.createElement('div');28    fiber.id = 'fiber';29    fiber.style.width = '100px';30    fiber.style.height = '100px';31    fiber.style.backgroundColor = 'red';32    document.body.appendChild(fiber);33    return fiber;34  });35  await page.evaluate(detachFiberMutation, fiber);36  await fiber.click();37  await browser.close();38})();39const { chromium } = require('playwright');40const { detachFiberMutation } = require('playwright/lib/server/dom');41(async () => {42  const browser = await chromium.launch();43  const context = await browser.newContext();44  const page = await context.newPage();45  const fiber = await page.evaluateHandle(() => {46    const fiber = document.createElement('div');

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.