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How to use mountSuspenseOffscreenState method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberBeginWork.new.js

Source:ReactFiberBeginWork.new.js

...1540const SUSPENDED_MARKER: SuspenseState = {1541  dehydrated: null,1542  retryLane: NoLane,1543};1544function mountSuspenseOffscreenState(renderLanes: Lanes): OffscreenState {1545  return {1546    baseLanes: renderLanes,1547  };1548}1549function updateSuspenseOffscreenState(1550  prevOffscreenState: OffscreenState,1551  renderLanes: Lanes,1552): OffscreenState {1553  return {1554    baseLanes: mergeLanes(prevOffscreenState.baseLanes, renderLanes),1555  };1556}1557// TODO: Probably should inline this back1558function shouldRemainOnFallback(1559  suspenseContext: SuspenseContext,1560  current: null | Fiber,1561  workInProgress: Fiber,1562  renderLanes: Lanes,1563) {1564  // If we're already showing a fallback, there are cases where we need to1565  // remain on that fallback regardless of whether the content has resolved.1566  // For example, SuspenseList coordinates when nested content appears.1567  if (current !== null) {1568    const suspenseState: SuspenseState = current.memoizedState;1569    if (suspenseState === null) {1570      // Currently showing content. Don't hide it, even if ForceSuspenseFallack1571      // is true. More precise name might be "ForceRemainSuspenseFallback".1572      // Note: This is a factoring smell. Can't remain on a fallback if there's1573      // no fallback to remain on.1574      return false;1575    }1576  }1577  // Not currently showing content. Consult the Suspense context.1578  return hasSuspenseContext(1579    suspenseContext,1580    (ForceSuspenseFallback: SuspenseContext),1581  );1582}1583function getRemainingWorkInPrimaryTree(current: Fiber, renderLanes) {1584  // TODO: Should not remove render lanes that were pinged during this render1585  return removeLanes(current.childLanes, renderLanes);1586}1587function updateSuspenseComponent(current, workInProgress, renderLanes) {1588  const nextProps = workInProgress.pendingProps;1589  // This is used by DevTools to force a boundary to suspend.1590  if (__DEV__) {1591    if (shouldSuspend(workInProgress)) {1592      workInProgress.flags |= DidCapture;1593    }1594  }1595  let suspenseContext: SuspenseContext = suspenseStackCursor.current;1596  let showFallback = false;1597  const didSuspend = (workInProgress.flags & DidCapture) !== NoFlags;1598  if (1599    didSuspend ||1600    shouldRemainOnFallback(1601      suspenseContext,1602      current,1603      workInProgress,1604      renderLanes,1605    )1606  ) {1607    // Something in this boundary's subtree already suspended. Switch to1608    // rendering the fallback children.1609    showFallback = true;1610    workInProgress.flags &= ~DidCapture;1611  } else {1612    // Attempting the main content1613    if (1614      current === null ||1615      (current.memoizedState: null | SuspenseState) !== null1616    ) {1617      // This is a new mount or this boundary is already showing a fallback state.1618      // Mark this subtree context as having at least one invisible parent that could1619      // handle the fallback state.1620      // Boundaries without fallbacks or should be avoided are not considered since1621      // they cannot handle preferred fallback states.1622      if (1623        nextProps.fallback !== undefined &&1624        nextProps.unstable_avoidThisFallback !== true1625      ) {1626        suspenseContext = addSubtreeSuspenseContext(1627          suspenseContext,1628          InvisibleParentSuspenseContext,1629        );1630      }1631    }1632  }1633  suspenseContext = setDefaultShallowSuspenseContext(suspenseContext);1634  pushSuspenseContext(workInProgress, suspenseContext);1635  // OK, the next part is confusing. We're about to reconcile the Suspense1636  // boundary's children. This involves some custom reconcilation logic. Two1637  // main reasons this is so complicated.1638  //1639  // First, Legacy Mode has different semantics for backwards compatibility. The1640  // primary tree will commit in an inconsistent state, so when we do the1641  // second pass to render the fallback, we do some exceedingly, uh, clever1642  // hacks to make that not totally break. Like transferring effects and1643  // deletions from hidden tree. In Concurrent Mode, it's much simpler,1644  // because we bailout on the primary tree completely and leave it in its old1645  // state, no effects. Same as what we do for Offscreen (except that1646  // Offscreen doesn't have the first render pass).1647  //1648  // Second is hydration. During hydration, the Suspense fiber has a slightly1649  // different layout, where the child points to a dehydrated fragment, which1650  // contains the DOM rendered by the server.1651  //1652  // Third, even if you set all that aside, Suspense is like error boundaries in1653  // that we first we try to render one tree, and if that fails, we render again1654  // and switch to a different tree. Like a try/catch block. So we have to track1655  // which branch we're currently rendering. Ideally we would model this using1656  // a stack.1657  if (current === null) {1658    // Initial mount1659    // If we're currently hydrating, try to hydrate this boundary.1660    // But only if this has a fallback.1661    if (nextProps.fallback !== undefined) {1662      tryToClaimNextHydratableInstance(workInProgress);1663      // This could've been a dehydrated suspense component.1664      if (enableSuspenseServerRenderer) {1665        const suspenseState: null | SuspenseState =1666          workInProgress.memoizedState;1667        if (suspenseState !== null) {1668          const dehydrated = suspenseState.dehydrated;1669          if (dehydrated !== null) {1670            return mountDehydratedSuspenseComponent(1671              workInProgress,1672              dehydrated,1673              renderLanes,1674            );1675          }1676        }1677      }1678    }1679    const nextPrimaryChildren = nextProps.children;1680    const nextFallbackChildren = nextProps.fallback;1681    if (showFallback) {1682      const fallbackFragment = mountSuspenseFallbackChildren(1683        workInProgress,1684        nextPrimaryChildren,1685        nextFallbackChildren,1686        renderLanes,1687      );1688      const primaryChildFragment: Fiber = (workInProgress.child: any);1689      primaryChildFragment.memoizedState = mountSuspenseOffscreenState(1690        renderLanes,1691      );1692      workInProgress.memoizedState = SUSPENDED_MARKER;1693      return fallbackFragment;1694    } else if (typeof nextProps.unstable_expectedLoadTime === 'number') {1695      // This is a CPU-bound tree. Skip this tree and show a placeholder to1696      // unblock the surrounding content. Then immediately retry after the1697      // initial commit.1698      const fallbackFragment = mountSuspenseFallbackChildren(1699        workInProgress,1700        nextPrimaryChildren,1701        nextFallbackChildren,1702        renderLanes,1703      );1704      const primaryChildFragment: Fiber = (workInProgress.child: any);1705      primaryChildFragment.memoizedState = mountSuspenseOffscreenState(1706        renderLanes,1707      );1708      workInProgress.memoizedState = SUSPENDED_MARKER;1709      // Since nothing actually suspended, there will nothing to ping this to1710      // get it started back up to attempt the next item. While in terms of1711      // priority this work has the same priority as this current render, it's1712      // not part of the same transition once the transition has committed. If1713      // it's sync, we still want to yield so that it can be painted.1714      // Conceptually, this is really the same as pinging. We can use any1715      // RetryLane even if it's the one currently rendering since we're leaving1716      // it behind on this node.1717      workInProgress.lanes = SomeRetryLane;1718      if (enableSchedulerTracing) {1719        markSpawnedWork(SomeRetryLane);1720      }1721      return fallbackFragment;1722    } else {1723      return mountSuspensePrimaryChildren(1724        workInProgress,1725        nextPrimaryChildren,1726        renderLanes,1727      );1728    }1729  } else {1730    // This is an update.1731    // If the current fiber has a SuspenseState, that means it's already showing1732    // a fallback.1733    const prevState: null | SuspenseState = current.memoizedState;1734    if (prevState !== null) {1735      // The current tree is already showing a fallback1736      // Special path for hydration1737      if (enableSuspenseServerRenderer) {1738        const dehydrated = prevState.dehydrated;1739        if (dehydrated !== null) {1740          if (!didSuspend) {1741            return updateDehydratedSuspenseComponent(1742              current,1743              workInProgress,1744              dehydrated,1745              prevState,1746              renderLanes,1747            );1748          } else if (1749            (workInProgress.memoizedState: null | SuspenseState) !== null1750          ) {1751            // Something suspended and we should still be in dehydrated mode.1752            // Leave the existing child in place.1753            workInProgress.child = current.child;1754            // The dehydrated completion pass expects this flag to be there1755            // but the normal suspense pass doesn't.1756            workInProgress.flags |= DidCapture;1757            return null;1758          } else {1759            // Suspended but we should no longer be in dehydrated mode.1760            // Therefore we now have to render the fallback.1761            const nextPrimaryChildren = nextProps.children;1762            const nextFallbackChildren = nextProps.fallback;1763            const fallbackChildFragment = mountSuspenseFallbackAfterRetryWithoutHydrating(1764              current,1765              workInProgress,1766              nextPrimaryChildren,1767              nextFallbackChildren,1768              renderLanes,1769            );1770            const primaryChildFragment: Fiber = (workInProgress.child: any);1771            primaryChildFragment.memoizedState = mountSuspenseOffscreenState(1772              renderLanes,1773            );1774            workInProgress.memoizedState = SUSPENDED_MARKER;1775            return fallbackChildFragment;1776          }1777        }1778      }1779      if (showFallback) {1780        const nextFallbackChildren = nextProps.fallback;1781        const nextPrimaryChildren = nextProps.children;1782        const fallbackChildFragment = updateSuspenseFallbackChildren(1783          current,1784          workInProgress,1785          nextPrimaryChildren,1786          nextFallbackChildren,1787          renderLanes,1788        );1789        const primaryChildFragment: Fiber = (workInProgress.child: any);1790        const prevOffscreenState: OffscreenState | null = (current.child: any)1791          .memoizedState;1792        primaryChildFragment.memoizedState =1793          prevOffscreenState === null1794            ? mountSuspenseOffscreenState(renderLanes)1795            : updateSuspenseOffscreenState(prevOffscreenState, renderLanes);1796        primaryChildFragment.childLanes = getRemainingWorkInPrimaryTree(1797          current,1798          renderLanes,1799        );1800        workInProgress.memoizedState = SUSPENDED_MARKER;1801        return fallbackChildFragment;1802      } else {1803        const nextPrimaryChildren = nextProps.children;1804        const primaryChildFragment = updateSuspensePrimaryChildren(1805          current,1806          workInProgress,1807          nextPrimaryChildren,1808          renderLanes,1809        );1810        workInProgress.memoizedState = null;1811        return primaryChildFragment;1812      }1813    } else {1814      // The current tree is not already showing a fallback.1815      if (showFallback) {1816        // Timed out.1817        const nextFallbackChildren = nextProps.fallback;1818        const nextPrimaryChildren = nextProps.children;1819        const fallbackChildFragment = updateSuspenseFallbackChildren(1820          current,1821          workInProgress,1822          nextPrimaryChildren,1823          nextFallbackChildren,1824          renderLanes,1825        );1826        const primaryChildFragment: Fiber = (workInProgress.child: any);1827        const prevOffscreenState: OffscreenState | null = (current.child: any)1828          .memoizedState;1829        primaryChildFragment.memoizedState =1830          prevOffscreenState === null1831            ? mountSuspenseOffscreenState(renderLanes)1832            : updateSuspenseOffscreenState(prevOffscreenState, renderLanes);1833        primaryChildFragment.childLanes = getRemainingWorkInPrimaryTree(1834          current,1835          renderLanes,1836        );1837        // Skip the primary children, and continue working on the1838        // fallback children.1839        workInProgress.memoizedState = SUSPENDED_MARKER;1840        return fallbackChildFragment;1841      } else {1842        // Still haven't timed out. Continue rendering the children, like we1843        // normally do.1844        const nextPrimaryChildren = nextProps.children;1845        const primaryChildFragment = updateSuspensePrimaryChildren(...

ReactFiberBeginWork.old.js

Source:ReactFiberBeginWork.old.js

...829  var SUSPENDED_MARKER = {830    dehydrated: null,831    retryLane: NoLane832  };833  function mountSuspenseOffscreenState(renderLanes) {834    return {835      baseLanes: renderLanes836    };837  }838  function updateSuspenseOffscreenState(prevOffscreenState, renderLanes) {839    return {840      baseLanes: mergeLanes(prevOffscreenState.baseLanes, renderLanes)841    };842  } // TODO: Probably should inline this back843  function shouldRemainOnFallback(suspenseContext, current, workInProgress, renderLanes) {844    // If we're already showing a fallback, there are cases where we need to845    // remain on that fallback regardless of whether the content has resolved.846    // For example, SuspenseList coordinates when nested content appears.847    if (current !== null) {848      var suspenseState = current.memoizedState;849      if (suspenseState === null) {850        // Currently showing content. Don't hide it, even if ForceSuspenseFallack851        // is true. More precise name might be "ForceRemainSuspenseFallback".852        // Note: This is a factoring smell. Can't remain on a fallback if there's853        // no fallback to remain on.854        return false;855      }856    } // Not currently showing content. Consult the Suspense context.857    return hasSuspenseContext(suspenseContext, ForceSuspenseFallback);858  }859  function getRemainingWorkInPrimaryTree(current, renderLanes) {860    // TODO: Should not remove render lanes that were pinged during this render861    return removeLanes(current.childLanes, renderLanes);862  }863  function updateSuspenseComponent(current, workInProgress, renderLanes) {864    var nextProps = workInProgress.pendingProps; // This is used by DevTools to force a boundary to suspend.865    {866      if (shouldSuspend(workInProgress)) {867        workInProgress.flags |= DidCapture;868      }869    }870    var suspenseContext = suspenseStackCursor.current;871    var showFallback = false;872    var didSuspend = (workInProgress.flags & DidCapture) !== NoFlags;873    if (didSuspend || shouldRemainOnFallback(suspenseContext, current)) {874      // Something in this boundary's subtree already suspended. Switch to875      // rendering the fallback children.876      showFallback = true;877      workInProgress.flags &= ~DidCapture;878    } else {879      // Attempting the main content880      if (current === null || current.memoizedState !== null) {881        // This is a new mount or this boundary is already showing a fallback state.882        // Mark this subtree context as having at least one invisible parent that could883        // handle the fallback state.884        // Boundaries without fallbacks or should be avoided are not considered since885        // they cannot handle preferred fallback states.886        if (nextProps.fallback !== undefined && nextProps.unstable_avoidThisFallback !== true) {887          suspenseContext = addSubtreeSuspenseContext(suspenseContext, InvisibleParentSuspenseContext);888        }889      }890    }891    suspenseContext = setDefaultShallowSuspenseContext(suspenseContext);892    pushSuspenseContext(workInProgress, suspenseContext); // OK, the next part is confusing. We're about to reconcile the Suspense893    // boundary's children. This involves some custom reconcilation logic. Two894    // main reasons this is so complicated.895    //896    // First, Legacy Mode has different semantics for backwards compatibility. The897    // primary tree will commit in an inconsistent state, so when we do the898    // second pass to render the fallback, we do some exceedingly, uh, clever899    // hacks to make that not totally break. Like transferring effects and900    // deletions from hidden tree. In Concurrent Mode, it's much simpler,901    // because we bailout on the primary tree completely and leave it in its old902    // state, no effects. Same as what we do for Offscreen (except that903    // Offscreen doesn't have the first render pass).904    //905    // Second is hydration. During hydration, the Suspense fiber has a slightly906    // different layout, where the child points to a dehydrated fragment, which907    // contains the DOM rendered by the server.908    //909    // Third, even if you set all that aside, Suspense is like error boundaries in910    // that we first we try to render one tree, and if that fails, we render again911    // and switch to a different tree. Like a try/catch block. So we have to track912    // which branch we're currently rendering. Ideally we would model this using913    // a stack.914    if (current === null) {915      // Initial mount916      // If we're currently hydrating, try to hydrate this boundary.917      // But only if this has a fallback.918      if (nextProps.fallback !== undefined) {919        tryToClaimNextHydratableInstance(workInProgress); // This could've been a dehydrated suspense component.920        {921          var suspenseState = workInProgress.memoizedState;922          if (suspenseState !== null) {923            var dehydrated = suspenseState.dehydrated;924            if (dehydrated !== null) {925              return mountDehydratedSuspenseComponent(workInProgress, dehydrated);926            }927          }928        }929      }930      var nextPrimaryChildren = nextProps.children;931      var nextFallbackChildren = nextProps.fallback;932      if (showFallback) {933        var fallbackFragment = mountSuspenseFallbackChildren(workInProgress, nextPrimaryChildren, nextFallbackChildren, renderLanes);934        var primaryChildFragment = workInProgress.child;935        primaryChildFragment.memoizedState = mountSuspenseOffscreenState(renderLanes);936        workInProgress.memoizedState = SUSPENDED_MARKER;937        return fallbackFragment;938      } else if (typeof nextProps.unstable_expectedLoadTime === 'number') {939        // This is a CPU-bound tree. Skip this tree and show a placeholder to940        // unblock the surrounding content. Then immediately retry after the941        // initial commit.942        var _fallbackFragment = mountSuspenseFallbackChildren(workInProgress, nextPrimaryChildren, nextFallbackChildren, renderLanes);943        var _primaryChildFragment = workInProgress.child;944        _primaryChildFragment.memoizedState = mountSuspenseOffscreenState(renderLanes);945        workInProgress.memoizedState = SUSPENDED_MARKER; // Since nothing actually suspended, there will nothing to ping this to946        // get it started back up to attempt the next item. While in terms of947        // priority this work has the same priority as this current render, it's948        // not part of the same transition once the transition has committed. If949        // it's sync, we still want to yield so that it can be painted.950        // Conceptually, this is really the same as pinging. We can use any951        // RetryLane even if it's the one currently rendering since we're leaving952        // it behind on this node.953        workInProgress.lanes = SomeRetryLane;954        {955          markSpawnedWork(SomeRetryLane);956        }957        return _fallbackFragment;958      } else {959        return mountSuspensePrimaryChildren(workInProgress, nextPrimaryChildren, renderLanes);960      }961    } else {962      // This is an update.963      // If the current fiber has a SuspenseState, that means it's already showing964      // a fallback.965      var prevState = current.memoizedState;966      if (prevState !== null) {967        // The current tree is already showing a fallback968        // Special path for hydration969        {970          var _dehydrated = prevState.dehydrated;971          if (_dehydrated !== null) {972            if (!didSuspend) {973              return updateDehydratedSuspenseComponent(current, workInProgress, _dehydrated, prevState, renderLanes);974            } else if (workInProgress.memoizedState !== null) {975              // Something suspended and we should still be in dehydrated mode.976              // Leave the existing child in place.977              workInProgress.child = current.child; // The dehydrated completion pass expects this flag to be there978              // but the normal suspense pass doesn't.979              workInProgress.flags |= DidCapture;980              return null;981            } else {982              // Suspended but we should no longer be in dehydrated mode.983              // Therefore we now have to render the fallback.984              var _nextPrimaryChildren = nextProps.children;985              var _nextFallbackChildren = nextProps.fallback;986              var fallbackChildFragment = mountSuspenseFallbackAfterRetryWithoutHydrating(current, workInProgress, _nextPrimaryChildren, _nextFallbackChildren, renderLanes);987              var _primaryChildFragment2 = workInProgress.child;988              _primaryChildFragment2.memoizedState = mountSuspenseOffscreenState(renderLanes);989              workInProgress.memoizedState = SUSPENDED_MARKER;990              return fallbackChildFragment;991            }992          }993        }994        if (showFallback) {995          var _nextFallbackChildren2 = nextProps.fallback;996          var _nextPrimaryChildren2 = nextProps.children;997          var _fallbackChildFragment = updateSuspenseFallbackChildren(current, workInProgress, _nextPrimaryChildren2, _nextFallbackChildren2, renderLanes);998          var _primaryChildFragment3 = workInProgress.child;999          var prevOffscreenState = current.child.memoizedState;1000          _primaryChildFragment3.memoizedState = prevOffscreenState === null ? mountSuspenseOffscreenState(renderLanes) : updateSuspenseOffscreenState(prevOffscreenState, renderLanes);1001          _primaryChildFragment3.childLanes = getRemainingWorkInPrimaryTree(current, renderLanes);1002          workInProgress.memoizedState = SUSPENDED_MARKER;1003          return _fallbackChildFragment;1004        } else {1005          var _nextPrimaryChildren3 = nextProps.children;1006          var _primaryChildFragment4 = updateSuspensePrimaryChildren(current, workInProgress, _nextPrimaryChildren3, renderLanes);1007          workInProgress.memoizedState = null;1008          return _primaryChildFragment4;1009        }1010      } else {1011        // The current tree is not already showing a fallback.1012        if (showFallback) {1013          // Timed out.1014          var _nextFallbackChildren3 = nextProps.fallback;1015          var _nextPrimaryChildren4 = nextProps.children;1016          var _fallbackChildFragment2 = updateSuspenseFallbackChildren(current, workInProgress, _nextPrimaryChildren4, _nextFallbackChildren3, renderLanes);1017          var _primaryChildFragment5 = workInProgress.child;1018          var _prevOffscreenState = current.child.memoizedState;1019          _primaryChildFragment5.memoizedState = _prevOffscreenState === null ? mountSuspenseOffscreenState(renderLanes) : updateSuspenseOffscreenState(_prevOffscreenState, renderLanes);1020          _primaryChildFragment5.childLanes = getRemainingWorkInPrimaryTree(current, renderLanes); // Skip the primary children, and continue working on the1021          // fallback children.1022          workInProgress.memoizedState = SUSPENDED_MARKER;1023          return _fallbackChildFragment2;1024        } else {1025          // Still haven't timed out. Continue rendering the children, like we1026          // normally do.1027          var _nextPrimaryChildren5 = nextProps.children;1028          var _primaryChildFragment6 = updateSuspensePrimaryChildren(current, workInProgress, _nextPrimaryChildren5, renderLanes);1029          workInProgress.memoizedState = null;1030          return _primaryChildFragment6;1031        }1032      }1033    }...

FiberBeginWork.js

Source:FiberBeginWork.js

...165}166const SUSPENDED_MARKER = {167  retryLane: NoLanes,168}169function mountSuspenseOffscreenState(renderLanes){170  return {171    baseLanes: renderLanes172  }173}174function updateSuspenseOffscreenState(175  prevOffscreenState,176  renderLanes,177){178  return {179    baseLanes: mergeLanes(prevOffscreenState.baseLanes, renderLanes),180  }181}182function shouldRemainOnFallback(suspenseContext, current, workInProgress){183  // If we're already showing a fallback, there are cases where we need to 184  // remain on that fallback regardless of whether the content has resolved.185  // e.g Suspense has unresolved children. 186  if (current !== null){187    const suspenseState = current.memoizedState;188    if(suspenseState === null){189      return false;190    }191  }192  // Not currently showing content. Consult the Suspense context.193  return hasSuspenseContext(194    suspenseContext,195    ForceSuspenseFallback196  )197}198function updateSuspenseComponent(current, workInProgress, renderLanes){ 199  const nextProps = workInProgress.pendingProps;200  let suspenseContext = suspenseStackCursor.current;201  let showFallback = false;202  const didSuspend = (workInProgress.flags & DidCapture) !== NoFlags;203  if(204    didSuspend ||205    shouldRemainOnFallback(206      suspenseContext,207      current,208      workInProgress209    )210  ){211    // part of the subtree has suspended and render the fallback children.212    showFallback = true;213    workInProgress.flags &= ~DidCapture;214  } else {215    // Attempting the main content216    if(217      current === null ||218      (current.memoizedState !== null)219    ){220      // This is a new mount waiting for resolving content or this boundary is 221      // already showing a fallback state.222     // Mark this subtree context as having at least one invisible parent that 223     // could handle the fallback state..224      suspenseContext = addSubtreeSuspenseContext(225        suspenseContext,226        InvisibleParentSuspenseContext,227      )  228    }229  }230  // pushSuspenseContext()231  push(suspenseStackCursor, suspenseContext);232  if (current === null){233    // Initial mount234    const nextPrimaryChildren = nextProps.children;235    const nextFallbackChildren = nextProps.fallback;236    if (showFallback){237      const fallbackFragment = mountSuspenseFallbackChildren(238        workInProgress,239        nextPrimaryChildren,240        nextFallbackChildren,241        renderLanes,242      );243      const primaryChildFragment = workInProgress.child;244      primaryChildFragment.memoizedState = mountSuspenseOffscreenState(245        renderLanes,246      );247      workInProgress.memoizedState = SUSPENDED_MARKER;248      return fallbackFragment;249    } else {250      return mountSuspensePrimaryChildren(251        workInProgress,252        nextPrimaryChildren,253        renderLanes,254      )255    }256  } else {257    // Update.258    // If the current fiber has a SuspenseState, that means it's already 259    // showing a fallback.260    const prevState = current.memoizedState;261    if (prevState !== null){262      if (showFallback){263        const nextFallbackChildren = nextProps.fallback;264        const nextPrimaryChildren = nextProps.children;265        const fallbackChildFragment = updateSuspenseFallbackChildren(266          current,267          workInProgress,268          nextPrimaryChildren,269          nextFallbackChildren,270          renderLanes271        )272        const primaryChildFragment = workInProgress.child;273        const prevOffscreenState = current.child.memoizedState;274        primaryChildFragment.memoizedState = 275          prevOffscreenState === null276          ? mountSuspenseOffscreenState(renderLanes)277          : updateSuspenseOffscreenState(prevOffscreenState, renderLanes);      278        primaryChildFragment.childLanes = removeLanes(279          current.childLanes, 280          renderLanes281        );282        workInProgress.memoizedState = SUSPENDED_MARKER;283        return fallbackChildFragment;       284      } else {285        const nextPrimaryChildren = nextProps.children;286        const primaryChildFragment = updateSuspensePrimaryChildren(287          current,288          workInProgress,289          nextPrimaryChildren,290          renderLanes,291        );292        workInProgress.memoizedState = null;293        return primaryChildFragment;294      }295    } else {296      // the current tree is not showing a fallback.297      if(showFallback){298        // Timed out.299        const nextFallbackChildren = nextProps.fallback;300        const nextPrimaryChildren = nextProps.children;301        const fallbackChildFragment = updateSuspenseFallbackChildren(302          current,303          workInProgress,304          nextPrimaryChildren,305          nextFallbackChildren,306          renderLanes307        )308        const primaryChildFragment = workInProgress.child;309        const prevOffscreenState = current.child.memoizedState;310        primaryChildFragment.memoizedState = 311          prevOffscreenState === null312          ? mountSuspenseOffscreenState(renderLanes)313          : updateSuspenseOffscreenState(prevOffscreenState, renderLanes);      314        primaryChildFragment.childLanes = removeLanes(315          current.childLanes, 316          renderLanes317        );318        workInProgress.memoizedState = SUSPENDED_MARKER;319        return fallbackChildFragment;320      } else {321        const nextPrimaryChildren = nextProps.children;322        const primaryChildFragment = updateSuspensePrimaryChildren(323          current,324          workInProgress,325          nextPrimaryChildren,326          renderLanes,...

Using AI Code Generation

1const { mountSuspenseOffscreenState } = require('playwright/lib/server/supplements/utils/suspense');2const { waitForSuspense } = require('playwright/lib/server/supplements/utils/suspense');3const { waitForSuspense } = require('playwright/lib/server/supplements/utils/suspense');4const { waitForSuspense } = require('playwright/lib/server/supplements/utils/suspense');5const { waitForSuspense } = require('playwright/lib/server/supplements/utils/suspense');6const { waitForSuspense } = require('playwright/lib/server/supplements/utils/suspense');7const { waitForSuspense } = require('playwright/lib/server/supplements/utils/suspense');8const { waitForSuspense } = require('playwright/lib/server/supplements/utils/suspense');9const { waitForSuspense } = require('playwright/lib/server/supplements/utils/suspense');10const { waitForSuspense } = require('playwright/lib/server/supplements/utils/suspense');11const { waitForSuspense } = require('playwright/lib/server/supplements/utils/suspense');12const { waitForSuspense } = require('playwright/lib/server/supplements/utils/suspense');13const { waitForSuspense } = require('playwright/lib/server/supplements/utils/suspense');14const { waitForSuspense } = require('playwright/lib/server/supplements/utils/suspense');15const { waitForSusp

Using AI Code Generation

1const { mountSuspenseOffscreenState } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement.js');2const { Page } = require('playwright-core/lib/server/page.js');3const { Frame } = require('playwright-core/lib/server/frames.js');4const { ElementHandle } = require('playwright-core/lib/server/dom.js');5const { mountSuspenseOffscreenState } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement.js');6const { Page } = require('playwright-core/lib/server/page.js');7const { Frame } = require('playwright-core/lib/server/frames.js');8const { ElementHandle } = require('playwright-core/lib/server/dom.js');9const { mountSuspenseOffscreenState } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement.js');10const { Page } = require('playwright-core/lib/server/page.js');11const { Frame } = require('playwright-core/lib/server/frames.js');12const { ElementHandle } = require('playwright-core/lib/server/dom.js');13const { mountSuspenseOffscreenState } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement.js');14const { Page } = require('playwright-core/lib/server/page.js');15const { Frame } = require('playwright-core/lib/server/frames.js');16const { ElementHandle } = require('playwright-core/lib/server/dom.js');17const { mountSuspenseOffscreenState } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement.js');18const { Page } = require('playwright-core/lib/server/page.js');19const { Frame } = require('playwright-core/lib/server/frames.js');20const { ElementHandle } = require('playwright-core/lib/server/dom.js');21const { mountSuspenseOffscreenState } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement.js');22const { Page } = require('playwright

Using AI Code Generation

1const { mountSuspenseOffscreenState } = require('playwright/lib/server/supplements/supplements.js');2const { test } = require('@playwright/test');3test('test', async ({ page }) => {4  mountSuspenseOffscreenState(page);5  await page.click('input[name="q"]');6  await page.fill('input[name="q"]', 'Playwright');7  await page.press('input[name="q"]', 'Enter');8  await page.waitForSelector('text=Playwright is a Node.js library to automate');9});10import { PlaywrightTestConfig } from '@playwright/test';11const config: PlaywrightTestConfig = {12  use: {13    viewport: { width: 1280, height: 720 },14  },15    {16      use: {17      },18    },19};20export default config;

Using AI Code Generation

1const { mountSuspenseOffscreenState } = require('playwright/lib/server/supplements/recorder/recorderApp');2const { Page } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  await page.waitForSelector('input[title="Search"]');7  await page.fill('input[title="Search"]', 'Playwright');8  await page.click('text=Playwright - Google Search');9  await page.waitForSelector('text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API');10  await page.click('text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API');11  await page.waitForSelector('text=GitHub - microsoft/playwright: Node library to automate');12  await mountSuspenseOffscreenState(page, 'text=GitHub - microsoft/playwright: Node library to automate');13  await page.click('text=GitHub - microsoft/playwright: Node library to automate');14  await page.waitForSelector('text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API');15  await page.click('text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API');16  await page.waitForSelector('text=GitHub - microsoft/playwright: Node library to automate');17  await mountSuspenseOffscreenState(page, 'text=GitHub - microsoft/playwright: Node library to automate');18  await page.click('text=GitHub - microsoft/playwright: Node library to automate');19  await page.waitForSelector('text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API');20  await page.click('text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API');21  await page.waitForSelector('text=GitHub - microsoft/playwright: Node library to automate');22  await mountSuspenseOffscreenState(page, 'text=GitHub - microsoft/playwright: Node library to automate');23  await page.click('text=GitHub - microsoft

Using AI Code Generation

1const { mountSuspenseOffscreenState } = require('playwright/lib/server/supplements/suspenseOffscreenState');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('input[name="q"]');8    await mountSuspenseOffscreenState(page);9    await page.screenshot({ path: 'google.png' });10    await page.type('input[name="q"]', 'playwright');11    await page.click('input[name="btnK"]');12    await page.waitForSelector('#result-stats');13    await page.screenshot({ path: 'search.png' });14    await browser.close();15})();16const { mountSuspenseOffscreenState } = require('playwright/lib/server/supplements/suspenseOffscreenState');17const { chromium } = require('playwright');18(async () => {19    const browser = await chromium.launch();20    const context = await browser.newContext({21        async beforeLoad(page) {22            await mountSuspenseOffscreenState(page);23        }24    });25    const page = await context.newPage();26    await page.waitForSelector('input[name="q"]');27    await page.screenshot({ path: 'google.png' });28    await page.type('input[name="q"]', 'playwright');29    await page.click('input[name="btnK"]');30    await page.waitForSelector('#result-stats');31    await page.screenshot({ path: 'search.png' });32    await browser.close();33})();

Using AI Code Generation

1const { mountSuspenseOffscreenState } = require('@playwright/test/lib/server/supplements/suspenseOffscreenState');2const { mountSuspenseOffscreenState } = require('@playwright/test/lib/server/supplements/suspenseOffscreenState');3const { mountSuspenseOffscreenState } = require('@playwright/test/lib/server/supplements/suspenseOffscreenState');4const { mountSuspenseOffscreenState } = require('@playwright/test/lib/server/supplements/suspenseOffscreenState');5const { mountSuspenseOffscreenState } = require('@playwright/test/lib/server/supplements/suspenseOffscreenState');6const { mountSuspenseOffscreenState } = require('@playwright/test/lib/server/supplements/suspenseOffscreenState');7const { mountSuspenseOffscreenState } = require('@playwright/test/lib/server/supplements/suspenseOffscreenState');8const { mountSuspenseOffscreenState } = require('@playwright/test/lib/server/supplements/suspenseOffscreenState');9const { mountSuspenseOffscreenState } = require('@playwright/test/lib/server/supplements/suspenseOffscreenState');10const { mountSuspenseOffscreenState } = require('@playwright/test/lib/server/supplements/suspenseOffscreenState');11const { mountSuspenseOffscreenState } = require('@playwright/test/lib/server/supplements/suspenseOffscreenState');12const { mountSuspenseOffscreenState } = require('@play

Using AI Code Generation

1const { mountSuspenseOffscreenState } = require('playwright/lib/server/supplements/supplements.js');2const { unmountSuspenseOffscreenState } = require('playwright/lib/server/supplements/supplements.js');3const { createSuspenseOffscreenState } = require('playwright/lib/server/supplements/supplements.js');4const { deleteSuspenseOffscreenState } = require('playwright/lib/server/supplements/supplements.js');5const { createSuspenseOffscreenState } = require('playwright/lib/server/supplements/supplements.js');6const { deleteSuspenseOffscreenState } = require('playwright/lib/server/supplements/supplements.js');7const { createSuspenseOffscreenState } = require('playwright/lib/server/supplements/supplements.js');8const { deleteSuspenseOffscreenState } = require('playwright/lib/server/supplements/supplements.js');9const { createSuspenseOffscreenState } = require('playwright/lib/server/supplements/supplements.js');10const { deleteSuspenseOffscreenState } = require('playwright/lib/server/supplements/supplements.js');

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.