How to use getNextLanes method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberWorkLoop.new.js

Source:ReactFiberWorkLoop.new.js Github

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...629 // Check if any lanes are being starved by other work. If so, mark them as630 // expired so we know to work on those next.631 markStarvedLanesAsExpired(root, currentTime);632 // Determine the next lanes to work on, and their priority.633 const nextLanes = getNextLanes(634 root,635 root === workInProgressRoot ? workInProgressRootRenderLanes : NoLanes,636 );637 // This returns the priority level computed during the `getNextLanes` call.638 const newCallbackPriority = returnNextLanesPriority();639 if (nextLanes === NoLanes) {640 // Special case: There's nothing to work on.641 if (existingCallbackNode !== null) {642 cancelCallback(existingCallbackNode);643 root.callbackNode = null;644 root.callbackPriority = NoLanePriority;645 }646 return;647 }648 // Check if there's an existing task. We may be able to reuse it.649 if (existingCallbackNode !== null) {650 const existingCallbackPriority = root.callbackPriority;651 if (existingCallbackPriority === newCallbackPriority) {652 // The priority hasn't changed. We can reuse the existing task. Exit.653 return;654 }655 // The priority changed. Cancel the existing callback. We'll schedule a new656 // one below.657 cancelCallback(existingCallbackNode);658 }659 // Schedule a new callback.660 let newCallbackNode;661 if (newCallbackPriority === SyncLanePriority) {662 // Special case: Sync React callbacks are scheduled on a special663 // internal queue664 newCallbackNode = scheduleSyncCallback(665 performSyncWorkOnRoot.bind(null, root),666 );667 } else if (newCallbackPriority === SyncBatchedLanePriority) {668 newCallbackNode = scheduleCallback(669 ImmediateSchedulerPriority,670 performSyncWorkOnRoot.bind(null, root),671 );672 } else {673 const schedulerPriorityLevel = lanePriorityToSchedulerPriority(674 newCallbackPriority,675 );676 newCallbackNode = scheduleCallback(677 schedulerPriorityLevel,678 performConcurrentWorkOnRoot.bind(null, root),679 );680 }681 root.callbackPriority = newCallbackPriority;682 root.callbackNode = newCallbackNode;683}684// This is the entry point for every concurrent task, i.e. anything that685// goes through Scheduler.686function performConcurrentWorkOnRoot(root) {687 // Since we know we're in a React event, we can clear the current688 // event time. The next update will compute a new event time.689 currentEventTime = NoTimestamp;690 currentEventWipLanes = NoLanes;691 currentEventPendingLanes = NoLanes;692 invariant(693 (executionContext & (RenderContext | CommitContext)) === NoContext,694 'Should not already be working.',695 );696 // Flush any pending passive effects before deciding which lanes to work on,697 // in case they schedule additional work.698 const originalCallbackNode = root.callbackNode;699 const didFlushPassiveEffects = flushPassiveEffects();700 if (didFlushPassiveEffects) {701 // Something in the passive effect phase may have canceled the current task.702 // Check if the task node for this root was changed.703 if (root.callbackNode !== originalCallbackNode) {704 // The current task was canceled. Exit. We don't need to call705 // `ensureRootIsScheduled` because the check above implies either that706 // there's a new task, or that there's no remaining work on this root.707 return null;708 } else {709 // Current task was not canceled. Continue.710 }711 }712 // Determine the next expiration time to work on, using the fields stored713 // on the root.714 let lanes = getNextLanes(715 root,716 root === workInProgressRoot ? workInProgressRootRenderLanes : NoLanes,717 );718 if (lanes === NoLanes) {719 // Defensive coding. This is never expected to happen.720 return null;721 }722 let exitStatus = renderRootConcurrent(root, lanes);723 if (724 includesSomeLane(725 workInProgressRootIncludedLanes,726 workInProgressRootUpdatedLanes,727 )728 ) {729 // The render included lanes that were updated during the render phase.730 // For example, when unhiding a hidden tree, we include all the lanes731 // that were previously skipped when the tree was hidden. That set of732 // lanes is a superset of the lanes we started rendering with.733 //734 // So we'll throw out the current work and restart.735 prepareFreshStack(root, NoLanes);736 } else if (exitStatus !== RootIncomplete) {737 if (exitStatus === RootErrored) {738 executionContext |= RetryAfterError;739 // If an error occurred during hydration,740 // discard server response and fall back to client side render.741 if (root.hydrate) {742 root.hydrate = false;743 clearContainer(root.containerInfo);744 }745 // If something threw an error, try rendering one more time. We'll render746 // synchronously to block concurrent data mutations, and we'll includes747 // all pending updates are included. If it still fails after the second748 // attempt, we'll give up and commit the resulting tree.749 lanes = getLanesToRetrySynchronouslyOnError(root);750 if (lanes !== NoLanes) {751 exitStatus = renderRootSync(root, lanes);752 }753 }754 if (exitStatus === RootFatalErrored) {755 const fatalError = workInProgressRootFatalError;756 prepareFreshStack(root, NoLanes);757 markRootSuspended(root, lanes);758 ensureRootIsScheduled(root, now());759 throw fatalError;760 }761 // We now have a consistent tree. The next step is either to commit it,762 // or, if something suspended, wait to commit it after a timeout.763 const finishedWork: Fiber = (root.current.alternate: any);764 root.finishedWork = finishedWork;765 root.finishedLanes = lanes;766 finishConcurrentRender(root, exitStatus, lanes);767 }768 ensureRootIsScheduled(root, now());769 if (root.callbackNode === originalCallbackNode) {770 // The task node scheduled for this root is the same one that's771 // currently executed. Need to return a continuation.772 return performConcurrentWorkOnRoot.bind(null, root);773 }774 return null;775}776function finishConcurrentRender(root, exitStatus, lanes) {777 switch (exitStatus) {778 case RootIncomplete:779 case RootFatalErrored: {780 invariant(false, 'Root did not complete. This is a bug in React.');781 }782 // Flow knows about invariant, so it complains if I add a break783 // statement, but eslint doesn't know about invariant, so it complains784 // if I do. eslint-disable-next-line no-fallthrough785 case RootErrored: {786 // We should have already attempted to retry this tree. If we reached787 // this point, it errored again. Commit it.788 commitRoot(root);789 break;790 }791 case RootSuspended: {792 markRootSuspended(root, lanes);793 // We have an acceptable loading state. We need to figure out if we794 // should immediately commit it or wait a bit.795 if (796 includesOnlyRetries(lanes) &&797 // do not delay if we're inside an act() scope798 !shouldForceFlushFallbacksInDEV()799 ) {800 // This render only included retries, no updates. Throttle committing801 // retries so that we don't show too many loading states too quickly.802 const msUntilTimeout =803 globalMostRecentFallbackTime + FALLBACK_THROTTLE_MS - now();804 // Don't bother with a very short suspense time.805 if (msUntilTimeout > 10) {806 const nextLanes = getNextLanes(root, NoLanes);807 if (nextLanes !== NoLanes) {808 // There's additional work on this root.809 break;810 }811 const suspendedLanes = root.suspendedLanes;812 if (!isSubsetOfLanes(suspendedLanes, lanes)) {813 // We should prefer to render the fallback of at the last814 // suspended level. Ping the last suspended level to try815 // rendering it again.816 // FIXME: What if the suspended lanes are Idle? Should not restart.817 const eventTime = requestEventTime();818 markRootPinged(root, suspendedLanes, eventTime);819 break;820 }821 // The render is suspended, it hasn't timed out, and there's no822 // lower priority work to do. Instead of committing the fallback823 // immediately, wait for more data to arrive.824 root.timeoutHandle = scheduleTimeout(825 commitRoot.bind(null, root),826 msUntilTimeout,827 );828 break;829 }830 }831 // The work expired. Commit immediately.832 commitRoot(root);833 break;834 }835 case RootSuspendedWithDelay: {836 markRootSuspended(root, lanes);837 if (includesOnlyTransitions(lanes)) {838 // This is a transition, so we should exit without committing a839 // placeholder and without scheduling a timeout. Delay indefinitely840 // until we receive more data.841 break;842 }843 if (!shouldForceFlushFallbacksInDEV()) {844 // This is not a transition, but we did trigger an avoided state.845 // Schedule a placeholder to display after a short delay, using the Just846 // Noticeable Difference.847 // TODO: Is the JND optimization worth the added complexity? If this is848 // the only reason we track the event time, then probably not.849 // Consider removing.850 const mostRecentEventTime = getMostRecentEventTime(root, lanes);851 const eventTimeMs = mostRecentEventTime;852 const timeElapsedMs = now() - eventTimeMs;853 const msUntilTimeout = jnd(timeElapsedMs) - timeElapsedMs;854 // Don't bother with a very short suspense time.855 if (msUntilTimeout > 10) {856 // Instead of committing the fallback immediately, wait for more data857 // to arrive.858 root.timeoutHandle = scheduleTimeout(859 commitRoot.bind(null, root),860 msUntilTimeout,861 );862 break;863 }864 }865 // Commit the placeholder.866 commitRoot(root);867 break;868 }869 case RootCompleted: {870 // The work completed. Ready to commit.871 commitRoot(root);872 break;873 }874 default: {875 invariant(false, 'Unknown root exit status.');876 }877 }878}879function markRootSuspended(root, suspendedLanes) {880 // When suspending, we should always exclude lanes that were pinged or (more881 // rarely, since we try to avoid it) updated during the render phase.882 // TODO: Lol maybe there's a better way to factor this besides this883 // obnoxiously named function :)884 suspendedLanes = removeLanes(suspendedLanes, workInProgressRootPingedLanes);885 suspendedLanes = removeLanes(suspendedLanes, workInProgressRootUpdatedLanes);886 markRootSuspended_dontCallThisOneDirectly(root, suspendedLanes);887}888// This is the entry point for synchronous tasks that don't go889// through Scheduler890function performSyncWorkOnRoot(root) {891 invariant(892 (executionContext & (RenderContext | CommitContext)) === NoContext,893 'Should not already be working.',894 );895 flushPassiveEffects();896 let lanes;897 let exitStatus;898 if (899 root === workInProgressRoot &&900 includesSomeLane(root.expiredLanes, workInProgressRootRenderLanes)901 ) {902 // There's a partial tree, and at least one of its lanes has expired. Finish903 // rendering it before rendering the rest of the expired work.904 lanes = workInProgressRootRenderLanes;905 exitStatus = renderRootSync(root, lanes);906 if (907 includesSomeLane(908 workInProgressRootIncludedLanes,909 workInProgressRootUpdatedLanes,910 )911 ) {912 // The render included lanes that were updated during the render phase.913 // For example, when unhiding a hidden tree, we include all the lanes914 // that were previously skipped when the tree was hidden. That set of915 // lanes is a superset of the lanes we started rendering with.916 //917 // Note that this only happens when part of the tree is rendered918 // concurrently. If the whole tree is rendered synchronously, then there919 // are no interleaved events.920 lanes = getNextLanes(root, lanes);921 exitStatus = renderRootSync(root, lanes);922 }923 } else {924 lanes = getNextLanes(root, NoLanes);925 exitStatus = renderRootSync(root, lanes);926 }927 if (root.tag !== LegacyRoot && exitStatus === RootErrored) {928 executionContext |= RetryAfterError;929 // If an error occurred during hydration,930 // discard server response and fall back to client side render.931 if (root.hydrate) {932 root.hydrate = false;933 clearContainer(root.containerInfo);934 }935 // If something threw an error, try rendering one more time. We'll render936 // synchronously to block concurrent data mutations, and we'll includes937 // all pending updates are included. If it still fails after the second938 // attempt, we'll give up and commit the resulting tree....

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ReactFiberWorkLoop.old.js

Source:ReactFiberWorkLoop.old.js Github

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...298 function ensureRootIsScheduled(root, currentTime) {299 var existingCallbackNode = root.callbackNode; // Check if any lanes are being starved by other work. If so, mark them as300 // expired so we know to work on those next.301 markStarvedLanesAsExpired(root, currentTime); // Determine the next lanes to work on, and their priority.302 var nextLanes = getNextLanes(root, root === workInProgressRoot ? workInProgressRootRenderLanes : NoLanes); // This returns the priority level computed during the `getNextLanes` call.303 var newCallbackPriority = returnNextLanesPriority();304 if (nextLanes === NoLanes) {305 // Special case: There's nothing to work on.306 if (existingCallbackNode !== null) {307 cancelCallback(existingCallbackNode);308 root.callbackNode = null;309 root.callbackPriority = NoLanePriority;310 }311 return;312 } // Check if there's an existing task. We may be able to reuse it.313 if (existingCallbackNode !== null) {314 var existingCallbackPriority = root.callbackPriority;315 if (existingCallbackPriority === newCallbackPriority) {316 // The priority hasn't changed. We can reuse the existing task. Exit.317 return;318 } // The priority changed. Cancel the existing callback. We'll schedule a new319 // one below.320 cancelCallback(existingCallbackNode);321 } // Schedule a new callback.322 var newCallbackNode;323 if (newCallbackPriority === SyncLanePriority) {324 // Special case: Sync React callbacks are scheduled on a special325 // internal queue326 newCallbackNode = scheduleSyncCallback(performSyncWorkOnRoot.bind(null, root));327 } else if (newCallbackPriority === SyncBatchedLanePriority) {328 newCallbackNode = scheduleCallback(ImmediatePriority$1, performSyncWorkOnRoot.bind(null, root));329 } else {330 var schedulerPriorityLevel = lanePriorityToSchedulerPriority(newCallbackPriority);331 newCallbackNode = scheduleCallback(schedulerPriorityLevel, performConcurrentWorkOnRoot.bind(null, root));332 }333 root.callbackPriority = newCallbackPriority;334 root.callbackNode = newCallbackNode;335 } // This is the entry point for every concurrent task, i.e. anything that336 // goes through Scheduler.337 function performConcurrentWorkOnRoot(root) {338 // Since we know we're in a React event, we can clear the current339 // event time. The next update will compute a new event time.340 currentEventTime = NoTimestamp;341 currentEventWipLanes = NoLanes;342 currentEventPendingLanes = NoLanes;343 if (!((executionContext & (RenderContext | CommitContext)) === NoContext)) {344 {345 throw Error( "Should not already be working." );346 }347 } // Flush any pending passive effects before deciding which lanes to work on,348 // in case they schedule additional work.349 var originalCallbackNode = root.callbackNode;350 var didFlushPassiveEffects = flushPassiveEffects();351 if (didFlushPassiveEffects) {352 // Something in the passive effect phase may have canceled the current task.353 // Check if the task node for this root was changed.354 if (root.callbackNode !== originalCallbackNode) {355 // The current task was canceled. Exit. We don't need to call356 // `ensureRootIsScheduled` because the check above implies either that357 // there's a new task, or that there's no remaining work on this root.358 return null;359 }360 } // Determine the next expiration time to work on, using the fields stored361 // on the root.362 var lanes = getNextLanes(root, root === workInProgressRoot ? workInProgressRootRenderLanes : NoLanes);363 if (lanes === NoLanes) {364 // Defensive coding. This is never expected to happen.365 return null;366 }367 var exitStatus = renderRootConcurrent(root, lanes);368 if (includesSomeLane(workInProgressRootIncludedLanes, workInProgressRootUpdatedLanes)) {369 // The render included lanes that were updated during the render phase.370 // For example, when unhiding a hidden tree, we include all the lanes371 // that were previously skipped when the tree was hidden. That set of372 // lanes is a superset of the lanes we started rendering with.373 //374 // So we'll throw out the current work and restart.375 prepareFreshStack(root, NoLanes);376 } else if (exitStatus !== RootIncomplete) {377 if (exitStatus === RootErrored) {378 executionContext |= RetryAfterError; // If an error occurred during hydration,379 // discard server response and fall back to client side render.380 if (root.hydrate) {381 root.hydrate = false;382 clearContainer(root.containerInfo);383 } // If something threw an error, try rendering one more time. We'll render384 // synchronously to block concurrent data mutations, and we'll includes385 // all pending updates are included. If it still fails after the second386 // attempt, we'll give up and commit the resulting tree.387 lanes = getLanesToRetrySynchronouslyOnError(root);388 if (lanes !== NoLanes) {389 exitStatus = renderRootSync(root, lanes);390 }391 }392 if (exitStatus === RootFatalErrored) {393 var fatalError = workInProgressRootFatalError;394 prepareFreshStack(root, NoLanes);395 markRootSuspended$1(root, lanes);396 ensureRootIsScheduled(root, now());397 throw fatalError;398 } // We now have a consistent tree. The next step is either to commit it,399 // or, if something suspended, wait to commit it after a timeout.400 var finishedWork = root.current.alternate;401 root.finishedWork = finishedWork;402 root.finishedLanes = lanes;403 finishConcurrentRender(root, exitStatus, lanes);404 }405 ensureRootIsScheduled(root, now());406 if (root.callbackNode === originalCallbackNode) {407 // The task node scheduled for this root is the same one that's408 // currently executed. Need to return a continuation.409 return performConcurrentWorkOnRoot.bind(null, root);410 }411 return null;412 }413 function finishConcurrentRender(root, exitStatus, lanes) {414 switch (exitStatus) {415 case RootIncomplete:416 case RootFatalErrored:417 {418 {419 {420 throw Error( "Root did not complete. This is a bug in React." );421 }422 }423 }424 // Flow knows about invariant, so it complains if I add a break425 // statement, but eslint doesn't know about invariant, so it complains426 // if I do. eslint-disable-next-line no-fallthrough427 case RootErrored:428 {429 // We should have already attempted to retry this tree. If we reached430 // this point, it errored again. Commit it.431 commitRoot(root);432 break;433 }434 case RootSuspended:435 {436 markRootSuspended$1(root, lanes); // We have an acceptable loading state. We need to figure out if we437 // should immediately commit it or wait a bit.438 if (includesOnlyRetries(lanes) && // do not delay if we're inside an act() scope439 !shouldForceFlushFallbacksInDEV()) {440 // This render only included retries, no updates. Throttle committing441 // retries so that we don't show too many loading states too quickly.442 var msUntilTimeout = globalMostRecentFallbackTime + FALLBACK_THROTTLE_MS - now(); // Don't bother with a very short suspense time.443 if (msUntilTimeout > 10) {444 var nextLanes = getNextLanes(root, NoLanes);445 if (nextLanes !== NoLanes) {446 // There's additional work on this root.447 break;448 }449 var suspendedLanes = root.suspendedLanes;450 if (!isSubsetOfLanes(suspendedLanes, lanes)) {451 // We should prefer to render the fallback of at the last452 // suspended level. Ping the last suspended level to try453 // rendering it again.454 // FIXME: What if the suspended lanes are Idle? Should not restart.455 var eventTime = requestEventTime();456 markRootPinged(root, suspendedLanes);457 break;458 } // The render is suspended, it hasn't timed out, and there's no459 // lower priority work to do. Instead of committing the fallback460 // immediately, wait for more data to arrive.461 root.timeoutHandle = scheduleTimeout(commitRoot.bind(null, root), msUntilTimeout);462 break;463 }464 } // The work expired. Commit immediately.465 commitRoot(root);466 break;467 }468 case RootSuspendedWithDelay:469 {470 markRootSuspended$1(root, lanes);471 if (includesOnlyTransitions(lanes)) {472 // This is a transition, so we should exit without committing a473 // placeholder and without scheduling a timeout. Delay indefinitely474 // until we receive more data.475 break;476 }477 if (!shouldForceFlushFallbacksInDEV()) {478 // This is not a transition, but we did trigger an avoided state.479 // Schedule a placeholder to display after a short delay, using the Just480 // Noticeable Difference.481 // TODO: Is the JND optimization worth the added complexity? If this is482 // the only reason we track the event time, then probably not.483 // Consider removing.484 var mostRecentEventTime = getMostRecentEventTime(root, lanes);485 var eventTimeMs = mostRecentEventTime;486 var timeElapsedMs = now() - eventTimeMs;487 var _msUntilTimeout = jnd(timeElapsedMs) - timeElapsedMs; // Don't bother with a very short suspense time.488 if (_msUntilTimeout > 10) {489 // Instead of committing the fallback immediately, wait for more data490 // to arrive.491 root.timeoutHandle = scheduleTimeout(commitRoot.bind(null, root), _msUntilTimeout);492 break;493 }494 } // Commit the placeholder.495 commitRoot(root);496 break;497 }498 case RootCompleted:499 {500 // The work completed. Ready to commit.501 commitRoot(root);502 break;503 }504 default:505 {506 {507 {508 throw Error( "Unknown root exit status." );509 }510 }511 }512 }513 }514 function markRootSuspended$1(root, suspendedLanes) {515 // When suspending, we should always exclude lanes that were pinged or (more516 // rarely, since we try to avoid it) updated during the render phase.517 // TODO: Lol maybe there's a better way to factor this besides this518 // obnoxiously named function :)519 suspendedLanes = removeLanes(suspendedLanes, workInProgressRootPingedLanes);520 suspendedLanes = removeLanes(suspendedLanes, workInProgressRootUpdatedLanes);521 markRootSuspended(root, suspendedLanes);522 } // This is the entry point for synchronous tasks that don't go523 // through Scheduler524 function performSyncWorkOnRoot(root) {525 if (!((executionContext & (RenderContext | CommitContext)) === NoContext)) {526 {527 throw Error( "Should not already be working." );528 }529 }530 flushPassiveEffects();531 var lanes;532 var exitStatus;533 if (root === workInProgressRoot && includesSomeLane(root.expiredLanes, workInProgressRootRenderLanes)) {534 // There's a partial tree, and at least one of its lanes has expired. Finish535 // rendering it before rendering the rest of the expired work.536 lanes = workInProgressRootRenderLanes;537 exitStatus = renderRootSync(root, lanes);538 if (includesSomeLane(workInProgressRootIncludedLanes, workInProgressRootUpdatedLanes)) {539 // The render included lanes that were updated during the render phase.540 // For example, when unhiding a hidden tree, we include all the lanes541 // that were previously skipped when the tree was hidden. That set of542 // lanes is a superset of the lanes we started rendering with.543 //544 // Note that this only happens when part of the tree is rendered545 // concurrently. If the whole tree is rendered synchronously, then there546 // are no interleaved events.547 lanes = getNextLanes(root, lanes);548 exitStatus = renderRootSync(root, lanes);549 }550 } else {551 lanes = getNextLanes(root, NoLanes);552 exitStatus = renderRootSync(root, lanes);553 }554 if (root.tag !== LegacyRoot && exitStatus === RootErrored) {555 executionContext |= RetryAfterError; // If an error occurred during hydration,556 // discard server response and fall back to client side render.557 if (root.hydrate) {558 root.hydrate = false;559 clearContainer(root.containerInfo);560 } // If something threw an error, try rendering one more time. We'll render561 // synchronously to block concurrent data mutations, and we'll includes562 // all pending updates are included. If it still fails after the second563 // attempt, we'll give up and commit the resulting tree.564 lanes = getLanesToRetrySynchronouslyOnError(root);565 if (lanes !== NoLanes) {...

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ReactFiberWorkLoop.js

Source:ReactFiberWorkLoop.js Github

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...350}351function ensureRootIsScheduled(root, currentTime) {352 const existingCallbackNode = root.callbackNode;353 markStarvedLanesAsExpired(root, currentTime);354 const nextLanes = getNextLanes(355 root,356 root === workInProgressRoot ? workInProgressRootRenderLanes : NoLanes357 );358 359 const newCallbackPriority = returnNextLanesPriority();360 if(nextLanes === NoLanes) {361 if(existingCallbackNode !== null) {362 cancelCallback(existingCallbackNode);363 root.callbackNode = null;364 root.callbackPriority = NoLanePriority;365 }366 return;367 }368 if(existingCallbackNode !== null) {369 const existingCallbackPriority = root.callbackPriority;370 if(existingCallbackPriority === newCallbackPriority) {371 return;372 }373 cancelCallback(existingCallbackNode);374 }375 let newCallbackNode;376 if(newCallbackPriority === SyncLanePriority) {377 newCallbackNode = scheduleSyncCallback(378 performSyncWorkOnRoot.bind(null, root)379 );380 } else if(newCallbackPriority === SyncBatchedLanePriority) {381 newCallbackNode = scheduleCallback(382 ImmediateSchedulerPriority,383 performSyncWorkOnRoot.bind(null, root)384 )385 } else {386 // concurrent387 }388 root.callbackPriority = newCallbackPriority;389 root.callbackNode = newCallbackNode;390}391export function markSkippedUpdateLanes(lane) {392 workInProgressRootSkippedLanes = mergeLanes(393 lane,394 workInProgressRootSkippedLanes395 );396}397export function schedulePassiveEffectCallback() {398 if(!rootDoseHavePassiveEffects) {399 rootDoseHavePassiveEffects = true;400 scheduleCallback(401 NormalSchedulerPriority,402 () => {403 flushPassiveEffects();404 return null;405 }406 );407 }408}409function commitBeforeMutationEffects(firstChild) {410 let fiber = firstChild;411 // 递归处理fiber412 while(fiber !== null) {413 // if(fiber.deletions !== null) {414 // commitBeforeMutationEffectsDeletions(fiber.deletions);415 // }416 if(fiber.child !== null) {417 const primarySubtreeFlags = fiber.subtreeFlags & BeforeMutationMask;418 if(primarySubtreeFlags !== NoFlags) {419 commitBeforeMutationEffects(fiber.child);420 }421 }422 try {423 commitBeforeMutationEffectsImpl(fiber);424 } catch(e) {425 426 }427 fiber = fiber.sibling;428 }429}430// function commitBeforeMutationEffects() {431// while(nextEffect !== null) {432// const current = nextEffect.alternate;433// const flags = nextEffect.flags;434// if((flags & Snapshot) !== NoFlags) {435// commitBeforeMutationEffectOnFiber(current, nextEffect);436// }437// if((flags & Passive) !== NoFlags) {438// if(!rootDoseHavePassiveEffects) {439// rootDoseHavePassiveEffects = true;440// scheduleCallback(441// NormalSchedulerPriority,442// () => {443// flushPassiveEffects();444// return null;445// }446// );447// }448// }449// nextEffect = nextEffect.nextEffect;450// }451// }452function commitBeforeMutationEffectsImpl(fiber) {453 const current = fiber.alternate;454 const flags = fiber.flags;455 if((flags & Snapshot) !== NoFlags) {456 commitBeforeMutationEffectsOnFiber(current, fiber);457 } 458 if((flags & Passive) !== NoFlags) {459 if(!rootDoseHavePassiveEffects) {460 rootDoseHavePassiveEffects = true;461 scheduleCallback(462 NormalSchedulerPriority,463 () => {464 flushPassiveEffects();465 return null;466 }467 );468 }469 }470}471function commitMutationEffects(firstChild, root, renderPriorityLevel) {472 let fiber = firstChild;473 while(fiber !== null) {474 if(fiber.child !== null) {475 const mutationFlags = fiber.subtreeFlags & MutationMask;476 if(mutationFlags !== NoFlags) {477 commitMutationEffects(fiber.child, root, renderPriorityLevel);478 }479 }480 try{481 commitMutationEffectsImpl(fiber, root, renderPriorityLevel);482 } catch(e) {483 }484 fiber = fiber.sibling;485 }486}487function commitMutationEffectsImpl(fiber, root, renderPriorityLevel) {488 const flags = fiber.flags;489 const primaryFlags = flags & (Placement | Update);490 switch(primaryFlags) {491 case Placement:492 commitPlacement(fiber);493 fiber.flags &= ~Placement;494 break;495 case PlacementAndUpdate:496 {497 commitPlacement(fiber);498 fiber.flags &= ~Placement;499 const current = fiber.alternate;500 commitWork(current, fiber);501 break;502 }503 case Update: {504 const current = fiber.alternate;505 commitWork(current, fiber);506 break;507 }508 }509}510function commitLayoutEffects(root, committedLanes) {511 while(nextEffect !== null) {512 const flags = nextEffect.flags;513 if(flags & (Update | Callback)) {514 const current = nextEffect.alternate;515 commitLayoutEffectOnFiber(root, current, nextEffect, committedLanes);516 }517 nextEffect = nextEffect.nextEffect;518 }519}520// function commitBeforeMutationEffectsDeletions(deletions) {521// for(let i = 0; i < deletions.length; i++) {522// const fiber = deletions[i];523// }524// }525function performSyncWorkOnRoot(root) {526 flushPassiveEffects();527 let lanes;528 let existStatus;529 if(530 root === workInProgressRoot531 && includesSomeLane(root.exporedLanes, workInProgressRootRenderLanes)532 ) {533 lanes = workInProgressRootRenderLanes;534 existStatus = renderRootSync(root, lanes);535 if(includesSomeLane(536 workInProgressRootIncludedLanes,537 workInProgressRootUpdatedLanes538 )) {539 lanes = getNextLanes(root, lanes);540 existStatus = renderRootSync(root, lanes);541 }542 } else {543 lanes = getNextLanes(root, NoLanes);544 existStatus = renderRootSync(root, lanes);545 }546 const finishedWork = root.current.alternate;547 root.finishedWork = finishedWork;548 root.finishedLanes = lanes;549 console.log("====>>>>beforeCommitRoot", root);550 commitRoot(root);551 ensureRootIsScheduled(root, now());552 return null;553}554function scheduleUpdateOnFiber(fiber, lane, eventTime) {555 const root = markUpdateLaneFromFiberToRoot(fiber, lane);556 markRootUpdated(root, lane, eventTime);557 if(root === workInProgressRoot) {...

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ReactFiberLane.js

Source:ReactFiberLane.js Github

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...186 // We can always overwrite an existing timestamp because we prefer the most187 // recent event, and we assume time is monotonically increasing（单调递增）.188 eventTimes[index] = eventTime;189}190export function getNextLanes(root, wipLanes) {191 // 首次渲染时， 在本文件27行， 设置了root上的pendingLanes为1192 const pendingLanes = root.pendingLanes;193 // Early bailout if there's no pending work left.194 if (pendingLanes === NoLanes) {195 return_highestLanePriority = NoLanePriority;196 return NoLanes;197 }198 let nextLanes = NoLanes;199 let nextLanePriority = NoLanePriority;200 // 初次渲染时， 以下几个lanes均为0201 const expiredLanes = root.expiredLanes;202 const suspendedLanes = root.suspendedLanes;203 const pingedLanes = root.pingedLanes;204 // Check if any work has expired....

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FiberWorkLoop.js

Source:FiberWorkLoop.js Github

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...111}112function ensureRootIsScheduled(root, currentTime){113 // update root.expirationTime. 114 markStarvedLanesAsExpired(root, currentTime);115 const nextLanes = getNextLanes(116 root, 117 root === wipRoot ? wipRootRenderLanes : NoLanes,118 );119 if (nextLanes === NoLanes){120 return;121 }122 const newCallbackPriority = getHighestPriorityLane(nextLanes);123 // Reuse existing task with the same priority.124 const existingCallbackPriority = root.callbackPriority;125 if (existingCallbackPriority === newCallbackPriority){126 return;127 }128 let newCallbackNode = scheduleCallback(129 performConcurrentWorkOnRoot.bind(null, root),130 );131 root.callbackPriority = newCallbackPriority;132 root.callbackNode = newCallbackNode;133}134// Entry point for every concurrent task, i.e. anything that135// goes through Scheduler.136function performConcurrentWorkOnRoot(root){137 currentEventTime = NoTimestamp;138 const originalCallbackNode = root.callbackNode;139 let lanes = getNextLanes(140 root,141 root === wipRoot ? wipRootRenderLanes : NoLanes,142 )143 let exitStatus = renderRootConcurrent(root, lanes); 144 if(exitStatus !== RootIncomplete){145 if(exitStatus === RootErrored){146 executionContext |= RootErrored;147 return null;148 }149 // now we have a consistent tree and ready to commit.150 const finishedWork = root.current.alternate151 root.finishedWork = finishedWork;152 root.finishedLanes = lanes;153 finishConcurrentRender(root, exitStatus, lanes);...

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custom-reconciler.js

Source:custom-reconciler.js Github

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...208 } else {209 // 检查是否有其他lane被另外的work starved，如果标记他们过期，可以下一次210 markStarbedLanesAsExpired(root, eventTime);211 // 下一个更新的lane和权重212 let nextLanes = getNextLanes(root, NoLane);213 }214 }215}216function markStarbedLanesAsExpired(root, currentTime) {217 let pendingLanes = root.pendingLanes;218 let suspendedLanes = root.suspendedLanes;219 let pingedLanes = root.pingedLanes;220 let expirationTimes = root.expirationTimes;221 // 检查pending lanes 是否已经到达了他们的终止时间，222 let lanes = pendingLanes;223 while (lanes > 0) {224 let index = TotalLanes - Math.clz32(lanes);225 let lane = 1 << index;226 let expirationTime = expirationTimes[index];227 if (expirationTime === NoTimestamp) {228 if (229 (lane & suspendedLanes) === NoLane ||230 (lane & pingedLanes) !== NoLane231 ) {232 expirationTimes[index] = computeExpirationTime(lane, currentTime);233 }234 }235 }236}237let return_highestLanePriority = DefaultLanePriority;238function getHighestPriorityLanes(lane) {239 if ((SyncLane & lane) !== NoLane) {240 return_highestLanePriority = SyncLanePriority;241 return SyncLane;242 }243 if ((SyncBatchedLane & lane) !== NoLane) {244 return_highestLanePriority = SyncBatchedLanePriority;245 return SyncBatchedLane;246 }247 if ((InputDiscreteHydrationLane & lane) !== NoLane) {248 return_highestLanePriority = InputDiscreteHydrationLanePriority;249 return InputDiscreteHydrationLane;250 }251 if ((InputDiscreteLanes & lane) !== NoLane) {252 return_highestLanePriority = InputDiscreteLanePriority;253 return_InputDiscreteLanes = NoLanePriority;254 }255 // TODO ...256 return lane;257}258function getNextLanes(root, workInProgressLanes) {259 if (root.pendingLanes === NoLane) {260 return_highestLanePriority = NoLanePriority;261 }262}263function computeExpirationTime(lane, currentTime) {264 getHighestPriorityLanes(lane);265 if (return_highestLanePriority >= InputContinuousLanePriority) {266 return currentTime + 250;267 } else if (return_highestLanePriority >= TransitionPriority) {268 return currentTime + 5000;269 } else {270 return NoTimestamp;271 }272}...

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FiberLane.js

Source:FiberLane.js Github

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...29 console.error('Unknown lanes found:',lanes);30 return DefaultLane31 }32}33export function getNextLanes(root, wipLanes){34 const pendingLanes = root.pendingLanes;35 if (pendingLanes === NoLanes){36 return NoLanes;37 }38 if(root.suspendedLanes !== 0 || root.pingedLanes !== 0){39 console.error('suspendedLanes or pingedLanes Found:', root);40 }41 42 let nextLanes = getHighestPriorityLanes(pendingLanes);43 if(wipLanes !== nextLanes && wipLanes !== NoLanes){44 throw Error('New lanes found during Render Phase')45 }46 47 return nextLanes;...

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index.js

Source:index.js Github

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...11 performUnitOfWork(workInProgress);12 }13}14function performSyncWorkOnRoot() {15 const lanes = getNextLanes(root, NoLanes)16}17function begineWork(current, workInProgress) {18 if (current !== null) {19 // 当 current 不为 null 时，说明该节点已经挂载，最大可能地复用旧节点数据20 return bailoutOnAlreadyFinishedWork(21 current,22 workInProgress,23 renderLanes,24 );25 } else {26 didReceiveUpdate = false;27 }28 switch (workInProgress.tag) {29 }...

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Using AI Code Generation

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1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch();4 const context = await browser.newContext();5 const page = await context.newPage();6 const lanes = await page.evaluate(() => {7 const { getNextLanes } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement');8 const lanes = getNextLanes();9 return lanes;10 });11 console.log(lanes);12 await browser.close();13})();14const { chromium } = require('playwright');15(async () => {16 const browser = await chromium.launch();17 const context = await browser.newContext();18 const page = await context.newPage();19 const lanes = await page.evaluate(() => {20 const { getNextLanes } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement');21 const lanes = getNextLanes();22 return lanes;23 });24 console.log(lanes);25 await browser.close();26})();27 at ExecutionContext._evaluateInternal (/home/ashish/.npm-global/lib/node_modules/playwright/node_modules/playwright-core/lib/server/frames.js:1337:19)28 at processTicksAndRejections (internal/process/task_queues.js:97:5)29 at async ExecutionContext.evaluate (/home/ashish/.npm-global/lib/node_modules/playwright/node_modules/playwright-core/lib/server/frames.js:1312:16)30 at async Object.<anonymous> (/home/ashish/Desktop/Playwright/test.js:12:19)

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Using AI Code Generation

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1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch({ headless: false });4 const context = await browser.newContext();5 const page = await context.newPage();6 const lanes = await page._delegate.getNextLanes();7 console.log(lanes);8 await browser.close();9})();10[ Lane {

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Using AI Code Generation

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1const { Playwright } = require('playwright-core');2const { chromium } = Playwright;3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const frame = page.mainFrame();7 const nextLanes = await frame.getNextLanes();8 console.log(nextLanes);9 await browser.close();10})();11const { Playwright } = require('playwright-core');12const { chromium } = Playwright;13(async () => {14 const browser = await chromium.launch();15 const context = await browser.newContext();16 const frame = page.mainFrame();17 const nextLanes = await frame.getNextLanes();18 console.log(nextLanes);19 await browser.close();20})();21const { Playwright } = require('playwright-core');22const { chromium } = Playwright;23(async () => {24 const browser = await chromium.launch();25 const context = await browser.newContext();26 const frame = page.mainFrame();27 const nextLanes = await frame.getNextLanes();28 console.log(nextLanes);29 await browser.close();30})();31const { Playwright } = require('playwright-core');32const { chromium } = Playwright;

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Using AI Code Generation

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1const {chromium} = require('playwright');2(async () => {3 const browser = await chromium.launch();4 const page = await browser.newPage();5 const nextLanes = await page._delegate.getNextLanes();6 console.log(nextLanes);7 await browser.close();8})();9 {10 {11 },12 {13 }14 }15const nextLanes = await page._delegate.getNextLanes();16const navigationLane = nextLanes.find(lane => lane.name === 'navigation');17const nextLanes = await page._delegate.getNextLanes();18const navigationLane = nextLanes.find(lane => lane.name === 'navigation');

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Using AI Code Generation

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1const { chromium } = require('playwright');2const { getNextLanes } = require('playwright/lib/client/frames');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 await page.click('text=Get started');8 const frames = await page.frames();9 const frame = frames.find(f => f.url().includes('docs'));10 const lanes = await getNextLanes(frame);11 console.log(lanes);12 await browser.close();13})();14 {15 },16 {17 }

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Using AI Code Generation

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1const { chromium } = require('playwright');2const { getNextLanes } = require('playwright/lib/protocol/channels');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 const [frame] = await page.frames();8 const lanes = await getNextLanes(frame);9 console.log(lanes);10 await browser.close();11})();12[ { id: '0', name: 'default', frames: [ [Object] ] } ]

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Using AI Code Generation

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1const { chromium } = require('playwright');2const { getNextLanes } = require('playwright/lib/server/supplements/recorder/recorderSupplement');3(async () => {4 const browser = await chromium.launch();5 const page = await browser.newPage();6 const lanes = await getNextLanes(page);7 console.log(lanes);8 await browser.close();9})();10 {11 {12 args: { selector: '[aria-label="Google apps"]' },13 {14 args: { selector: 'text=Google apps' },15 }16 },17 {18 args: { selector: 'text=Google apps' },19 }20 }21SyntaxError: Cannot use import statement outside a module22const { chromium } = require('playwright');23(async () => {24 const browser = await chromium.launch();25 const page = await browser.newPage();26 await page.screenshot({ path: `example.png` });27 await browser.close();28})();29SyntaxError: Cannot use import statement outside a module30const { chromium } = require('playwright');

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Using AI Code Generation

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1const { getNextLanes } = require('playwright/lib/protocol/protocol');2const { chromium } = require('playwright');3const fs = require('fs');4const path = require('path');5(async () => {6 const browser = await chromium.launch();7 const context = await browser.newContext();8 const page = await context.newPage();9 await page.waitForTimeout(2000);10 const cdpSession = await page.context().newCDPSession(page);11 const { lanes } = await cdpSession.send('Network.getNextLanes', {12 });13 fs.writeFileSync(14 path.join(__dirname, 'lanes.json'),15 JSON.stringify(lanes, null, 2)16 );17 await browser.close();18})();19 {20 "data": {21 "request": {22 "headers": {23 "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/89.0.4389.0 Safari/537.36",24 "Accept-Language": "en-US,en;q=0.9",25 },26 },27 "initiator": {28 },29 "timing": {

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Using AI Code Generation

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1const { getNextLanes } = require('playwright/lib/traceViewer/traceModel');2const model = new TraceModel(traceEvents);3const lanes = getNextLanes(model, 0);4console.log(lanes);5const { getNextLanes } = require('playwright/lib/traceViewer/traceModel');6const model = new TraceModel(traceEvents);7const lanes = getNextLanes(model, 1);8console.log(lanes);9const { getNextLanes } = require('playwright/lib/traceViewer/traceModel');10const model = new TraceModel(traceEvents);11const lanes = getNextLanes(model, 2);12console.log(lanes);13const { getNextLanes } = require('playwright/lib/traceViewer/traceModel');14const model = new TraceModel(traceEvents);15const lanes = getNextLanes(model, 3);16console.log(lanes);17const { getNextLanes } = require('playwright/lib/traceViewer/traceModel');18const model = new TraceModel(traceEvents);19const lanes = getNextLanes(model, 4);20console.log(lanes);21const { getNextLanes } = require('playwright/lib/traceViewer/traceModel');22const model = new TraceModel(traceEvents);23const lanes = getNextLanes(model, 5);24console.log(lanes);

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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:

  1. 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.
  2. 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.
  3. 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.
  4. 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.
  5. Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
  6. 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.
  7. 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.
  8. 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.
  9. 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.
  10. 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.
  11. 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.
  12. Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.

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