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How to use reconcileChildrenIterator method in Playwright Internal
Best JavaScript code snippet using playwright-internal
ReactChildFiber.old.js
Source:ReactChildFiber.old.js 
...502 // search but that's unusual. Besides, for the two ended optimization to503 // work on Iterables, we'd need to copy the whole set.504 // In this first iteration, we'll just live with hitting the bad case505 // (adding everything to a Map) in for every insert/move.506 // If you change this code, also update reconcileChildrenIterator() which507 // uses the same algorithm.508 {509 // First, validate keys.510 var knownKeys = null;511 for (var i = 0; i < newChildren.length; i++) {512 var child = newChildren[i];513 knownKeys = warnOnInvalidKey(child, knownKeys, returnFiber);514 }515 }516 var resultingFirstChild = null;517 var previousNewFiber = null;518 var oldFiber = currentFirstChild;519 var lastPlacedIndex = 0;520 var newIdx = 0;521 var nextOldFiber = null;522 for (; oldFiber !== null && newIdx < newChildren.length; newIdx++) {523 if (oldFiber.index > newIdx) {524 nextOldFiber = oldFiber;525 oldFiber = null;526 } else {527 nextOldFiber = oldFiber.sibling;528 }529 var newFiber = updateSlot(returnFiber, oldFiber, newChildren[newIdx], lanes);530 if (newFiber === null) {531 // TODO: This breaks on empty slots like null children. That's532 // unfortunate because it triggers the slow path all the time. We need533 // a better way to communicate whether this was a miss or null,534 // boolean, undefined, etc.535 if (oldFiber === null) {536 oldFiber = nextOldFiber;537 }538 break;539 }540 if (shouldTrackSideEffects) {541 if (oldFiber && newFiber.alternate === null) {542 // We matched the slot, but we didn't reuse the existing fiber, so we543 // need to delete the existing child.544 deleteChild(returnFiber, oldFiber);545 }546 }547 lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);548 if (previousNewFiber === null) {549 // TODO: Move out of the loop. This only happens for the first run.550 resultingFirstChild = newFiber;551 } else {552 // TODO: Defer siblings if we're not at the right index for this slot.553 // I.e. if we had null values before, then we want to defer this554 // for each null value. However, we also don't want to call updateSlot555 // with the previous one.556 previousNewFiber.sibling = newFiber;557 }558 previousNewFiber = newFiber;559 oldFiber = nextOldFiber;560 }561 if (newIdx === newChildren.length) {562 // We've reached the end of the new children. We can delete the rest.563 deleteRemainingChildren(returnFiber, oldFiber);564 return resultingFirstChild;565 }566 if (oldFiber === null) {567 // If we don't have any more existing children we can choose a fast path568 // since the rest will all be insertions.569 for (; newIdx < newChildren.length; newIdx++) {570 var _newFiber = createChild(returnFiber, newChildren[newIdx], lanes);571 if (_newFiber === null) {572 continue;573 }574 lastPlacedIndex = placeChild(_newFiber, lastPlacedIndex, newIdx);575 if (previousNewFiber === null) {576 // TODO: Move out of the loop. This only happens for the first run.577 resultingFirstChild = _newFiber;578 } else {579 previousNewFiber.sibling = _newFiber;580 }581 previousNewFiber = _newFiber;582 }583 return resultingFirstChild;584 } // Add all children to a key map for quick lookups.585 var existingChildren = mapRemainingChildren(returnFiber, oldFiber); // Keep scanning and use the map to restore deleted items as moves.586 for (; newIdx < newChildren.length; newIdx++) {587 var _newFiber2 = updateFromMap(existingChildren, returnFiber, newIdx, newChildren[newIdx], lanes);588 if (_newFiber2 !== null) {589 if (shouldTrackSideEffects) {590 if (_newFiber2.alternate !== null) {591 // The new fiber is a work in progress, but if there exists a592 // current, that means that we reused the fiber. We need to delete593 // it from the child list so that we don't add it to the deletion594 // list.595 existingChildren.delete(_newFiber2.key === null ? newIdx : _newFiber2.key);596 }597 }598 lastPlacedIndex = placeChild(_newFiber2, lastPlacedIndex, newIdx);599 if (previousNewFiber === null) {600 resultingFirstChild = _newFiber2;601 } else {602 previousNewFiber.sibling = _newFiber2;603 }604 previousNewFiber = _newFiber2;605 }606 }607 if (shouldTrackSideEffects) {608 // Any existing children that weren't consumed above were deleted. We need609 // to add them to the deletion list.610 existingChildren.forEach(function (child) {611 return deleteChild(returnFiber, child);612 });613 }614 return resultingFirstChild;615 }616 function reconcileChildrenIterator(returnFiber, currentFirstChild, newChildrenIterable, lanes) {617 // This is the same implementation as reconcileChildrenArray(),618 // but using the iterator instead.619 var iteratorFn = getIteratorFn(newChildrenIterable);620 if (!(typeof iteratorFn === 'function')) {621 {622 throw Error( "An object is not an iterable. This error is likely caused by a bug in React. Please file an issue." );623 }624 }625 {626 // We don't support rendering Generators because it's a mutation.627 // See https://github.com/facebook/react/issues/12995628 if (typeof Symbol === 'function' && // $FlowFixMe Flow doesn't know about toStringTag629 newChildrenIterable[Symbol.toStringTag] === 'Generator') {630 if (!didWarnAboutGenerators) {631 error('Using Generators as children is unsupported and will likely yield ' + 'unexpected results because enumerating a generator mutates it. ' + 'You may convert it to an array with `Array.from()` or the ' + '`[...spread]` operator before rendering. Keep in mind ' + 'you might need to polyfill these features for older browsers.');632 }633 didWarnAboutGenerators = true;634 } // Warn about using Maps as children635 if (newChildrenIterable.entries === iteratorFn) {636 if (!didWarnAboutMaps) {637 error('Using Maps as children is not supported. ' + 'Use an array of keyed ReactElements instead.');638 }639 didWarnAboutMaps = true;640 } // First, validate keys.641 // We'll get a different iterator later for the main pass.642 var _newChildren = iteratorFn.call(newChildrenIterable);643 if (_newChildren) {644 var knownKeys = null;645 var _step = _newChildren.next();646 for (; !_step.done; _step = _newChildren.next()) {647 var child = _step.value;648 knownKeys = warnOnInvalidKey(child, knownKeys, returnFiber);649 }650 }651 }652 var newChildren = iteratorFn.call(newChildrenIterable);653 if (!(newChildren != null)) {654 {655 throw Error( "An iterable object provided no iterator." );656 }657 }658 var resultingFirstChild = null;659 var previousNewFiber = null;660 var oldFiber = currentFirstChild;661 var lastPlacedIndex = 0;662 var newIdx = 0;663 var nextOldFiber = null;664 var step = newChildren.next();665 for (; oldFiber !== null && !step.done; newIdx++, step = newChildren.next()) {666 if (oldFiber.index > newIdx) {667 nextOldFiber = oldFiber;668 oldFiber = null;669 } else {670 nextOldFiber = oldFiber.sibling;671 }672 var newFiber = updateSlot(returnFiber, oldFiber, step.value, lanes);673 if (newFiber === null) {674 // TODO: This breaks on empty slots like null children. That's675 // unfortunate because it triggers the slow path all the time. We need676 // a better way to communicate whether this was a miss or null,677 // boolean, undefined, etc.678 if (oldFiber === null) {679 oldFiber = nextOldFiber;680 }681 break;682 }683 if (shouldTrackSideEffects) {684 if (oldFiber && newFiber.alternate === null) {685 // We matched the slot, but we didn't reuse the existing fiber, so we686 // need to delete the existing child.687 deleteChild(returnFiber, oldFiber);688 }689 }690 lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);691 if (previousNewFiber === null) {692 // TODO: Move out of the loop. This only happens for the first run.693 resultingFirstChild = newFiber;694 } else {695 // TODO: Defer siblings if we're not at the right index for this slot.696 // I.e. if we had null values before, then we want to defer this697 // for each null value. However, we also don't want to call updateSlot698 // with the previous one.699 previousNewFiber.sibling = newFiber;700 }701 previousNewFiber = newFiber;702 oldFiber = nextOldFiber;703 }704 if (step.done) {705 // We've reached the end of the new children. We can delete the rest.706 deleteRemainingChildren(returnFiber, oldFiber);707 return resultingFirstChild;708 }709 if (oldFiber === null) {710 // If we don't have any more existing children we can choose a fast path711 // since the rest will all be insertions.712 for (; !step.done; newIdx++, step = newChildren.next()) {713 var _newFiber3 = createChild(returnFiber, step.value, lanes);714 if (_newFiber3 === null) {715 continue;716 }717 lastPlacedIndex = placeChild(_newFiber3, lastPlacedIndex, newIdx);718 if (previousNewFiber === null) {719 // TODO: Move out of the loop. This only happens for the first run.720 resultingFirstChild = _newFiber3;721 } else {722 previousNewFiber.sibling = _newFiber3;723 }724 previousNewFiber = _newFiber3;725 }726 return resultingFirstChild;727 } // Add all children to a key map for quick lookups.728 var existingChildren = mapRemainingChildren(returnFiber, oldFiber); // Keep scanning and use the map to restore deleted items as moves.729 for (; !step.done; newIdx++, step = newChildren.next()) {730 var _newFiber4 = updateFromMap(existingChildren, returnFiber, newIdx, step.value, lanes);731 if (_newFiber4 !== null) {732 if (shouldTrackSideEffects) {733 if (_newFiber4.alternate !== null) {734 // The new fiber is a work in progress, but if there exists a735 // current, that means that we reused the fiber. We need to delete736 // it from the child list so that we don't add it to the deletion737 // list.738 existingChildren.delete(_newFiber4.key === null ? newIdx : _newFiber4.key);739 }740 }741 lastPlacedIndex = placeChild(_newFiber4, lastPlacedIndex, newIdx);742 if (previousNewFiber === null) {743 resultingFirstChild = _newFiber4;744 } else {745 previousNewFiber.sibling = _newFiber4;746 }747 previousNewFiber = _newFiber4;748 }749 }750 if (shouldTrackSideEffects) {751 // Any existing children that weren't consumed above were deleted. We need752 // to add them to the deletion list.753 existingChildren.forEach(function (child) {754 return deleteChild(returnFiber, child);755 });756 }757 return resultingFirstChild;758 }759 function reconcileSingleTextNode(returnFiber, currentFirstChild, textContent, lanes) {760 // There's no need to check for keys on text nodes since we don't have a761 // way to define them.762 if (currentFirstChild !== null && currentFirstChild.tag === HostText) {763 // We already have an existing node so let's just update it and delete764 // the rest.765 deleteRemainingChildren(returnFiber, currentFirstChild.sibling);766 var existing = useFiber(currentFirstChild, textContent);767 existing.return = returnFiber;768 return existing;769 } // The existing first child is not a text node so we need to create one770 // and delete the existing ones.771 deleteRemainingChildren(returnFiber, currentFirstChild);772 var created = createFiberFromText(textContent, returnFiber.mode, lanes);773 created.return = returnFiber;774 return created;775 }776 function reconcileSingleElement(returnFiber, currentFirstChild, element, lanes) {777 var key = element.key;778 var child = currentFirstChild;779 while (child !== null) {780 // TODO: If key === null and child.key === null, then this only applies to781 // the first item in the list.782 if (child.key === key) {783 switch (child.tag) {784 case Fragment:785 {786 if (element.type === REACT_FRAGMENT_TYPE) {787 deleteRemainingChildren(returnFiber, child.sibling);788 var existing = useFiber(child, element.props.children);789 existing.return = returnFiber;790 {791 existing._debugSource = element._source;792 existing._debugOwner = element._owner;793 }794 return existing;795 }796 break;797 }798 case Block:799 {800 var type = element.type;801 if (type.$$typeof === REACT_LAZY_TYPE) {802 type = resolveLazyType(type);803 }804 if (type.$$typeof === REACT_BLOCK_TYPE) {805 // The new Block might not be initialized yet. We need to initialize806 // it in case initializing it turns out it would match.807 if (type._render === child.type._render) {808 deleteRemainingChildren(returnFiber, child.sibling);809 var _existing2 = useFiber(child, element.props);810 _existing2.type = type;811 _existing2.return = returnFiber;812 {813 _existing2._debugSource = element._source;814 _existing2._debugOwner = element._owner;815 }816 return _existing2;817 }818 }819 }820 // We intentionally fallthrough here if enableBlocksAPI is not on.821 // eslint-disable-next-lined no-fallthrough822 default:823 {824 if (child.elementType === element.type || ( // Keep this check inline so it only runs on the false path:825 isCompatibleFamilyForHotReloading(child, element) )) {826 deleteRemainingChildren(returnFiber, child.sibling);827 var _existing3 = useFiber(child, element.props);828 _existing3.ref = coerceRef(returnFiber, child, element);829 _existing3.return = returnFiber;830 {831 _existing3._debugSource = element._source;832 _existing3._debugOwner = element._owner;833 }834 return _existing3;835 }836 break;837 }838 } // Didn't match.839 deleteRemainingChildren(returnFiber, child);840 break;841 } else {842 deleteChild(returnFiber, child);843 }844 child = child.sibling;845 }846 if (element.type === REACT_FRAGMENT_TYPE) {847 var created = createFiberFromFragment(element.props.children, returnFiber.mode, lanes, element.key);848 created.return = returnFiber;849 return created;850 } else {851 var _created4 = createFiberFromElement(element, returnFiber.mode, lanes);852 _created4.ref = coerceRef(returnFiber, currentFirstChild, element);853 _created4.return = returnFiber;854 return _created4;855 }856 }857 function reconcileSinglePortal(returnFiber, currentFirstChild, portal, lanes) {858 var key = portal.key;859 var child = currentFirstChild;860 while (child !== null) {861 // TODO: If key === null and child.key === null, then this only applies to862 // the first item in the list.863 if (child.key === key) {864 if (child.tag === HostPortal && child.stateNode.containerInfo === portal.containerInfo && child.stateNode.implementation === portal.implementation) {865 deleteRemainingChildren(returnFiber, child.sibling);866 var existing = useFiber(child, portal.children || []);867 existing.return = returnFiber;868 return existing;869 } else {870 deleteRemainingChildren(returnFiber, child);871 break;872 }873 } else {874 deleteChild(returnFiber, child);875 }876 child = child.sibling;877 }878 var created = createFiberFromPortal(portal, returnFiber.mode, lanes);879 created.return = returnFiber;880 return created;881 } // This API will tag the children with the side-effect of the reconciliation882 // itself. They will be added to the side-effect list as we pass through the883 // children and the parent.884 function reconcileChildFibers(returnFiber, currentFirstChild, newChild, lanes) {885 // This function is not recursive.886 // If the top level item is an array, we treat it as a set of children,887 // not as a fragment. Nested arrays on the other hand will be treated as888 // fragment nodes. Recursion happens at the normal flow.889 // Handle top level unkeyed fragments as if they were arrays.890 // This leads to an ambiguity between <>{[...]}</> and <>...</>.891 // We treat the ambiguous cases above the same.892 var isUnkeyedTopLevelFragment = typeof newChild === 'object' && newChild !== null && newChild.type === REACT_FRAGMENT_TYPE && newChild.key === null;893 if (isUnkeyedTopLevelFragment) {894 newChild = newChild.props.children;895 } // Handle object types896 var isObject = typeof newChild === 'object' && newChild !== null;897 if (isObject) {898 switch (newChild.$$typeof) {899 case REACT_ELEMENT_TYPE:900 return placeSingleChild(reconcileSingleElement(returnFiber, currentFirstChild, newChild, lanes));901 case REACT_PORTAL_TYPE:902 return placeSingleChild(reconcileSinglePortal(returnFiber, currentFirstChild, newChild, lanes));903 case REACT_LAZY_TYPE:904 {905 var payload = newChild._payload;906 var init = newChild._init; // TODO: This function is supposed to be non-recursive.907 return reconcileChildFibers(returnFiber, currentFirstChild, init(payload), lanes);908 }909 }910 }911 if (typeof newChild === 'string' || typeof newChild === 'number') {912 return placeSingleChild(reconcileSingleTextNode(returnFiber, currentFirstChild, '' + newChild, lanes));913 }914 if (isArray$1(newChild)) {915 return reconcileChildrenArray(returnFiber, currentFirstChild, newChild, lanes);916 }917 if (getIteratorFn(newChild)) {918 return reconcileChildrenIterator(returnFiber, currentFirstChild, newChild, lanes);919 }920 if (isObject) {921 throwOnInvalidObjectType(returnFiber, newChild);922 }923 {924 if (typeof newChild === 'function') {925 warnOnFunctionType(returnFiber);926 }927 }928 if (typeof newChild === 'undefined' && !isUnkeyedTopLevelFragment) {929 // If the new child is undefined, and the return fiber is a composite930 // component, throw an error. If Fiber return types are disabled,931 // we already threw above.932 switch (returnFiber.tag) {...
reconcile.js
Source:reconcile.js
...698 // search but that's unusual. Besides, for the two ended optimization to699 // work on Iterables, we'd need to copy the whole set.700 // In this first iteration, we'll just live with hitting the bad case701 // (adding everything to a Map) in for every insert/move.702 // If you change this code, also update reconcileChildrenIterator() which703 // uses the same algorithm.704 if (__DEV__) {705 // First, validate keys.706 let knownKeys = null;707 for (let i = 0; i < newChildren.length; i++) {708 const child = newChildren[i];709 knownKeys = warnOnInvalidKey(child, knownKeys);710 }711 }712 let resultingFirstChild: Fiber | null = null;713 let previousNewFiber: Fiber | null = null;714 let oldFiber = currentFirstChild;715 let lastPlacedIndex = 0;716 let newIdx = 0;717 let nextOldFiber = null;718 for (; oldFiber !== null && newIdx < newChildren.length; newIdx++) {719 if (oldFiber.index > newIdx) {720 nextOldFiber = oldFiber;721 oldFiber = null;722 } else {723 nextOldFiber = oldFiber.sibling;724 }725 const newFiber = updateSlot(726 returnFiber,727 oldFiber,728 newChildren[newIdx],729 expirationTime,730 );731 if (newFiber === null) {732 // TODO: This breaks on empty slots like null children. That's733 // unfortunate because it triggers the slow path all the time. We need734 // a better way to communicate whether this was a miss or null,735 // boolean, undefined, etc.736 if (oldFiber === null) {737 oldFiber = nextOldFiber;738 }739 break;740 }741 if (shouldTrackSideEffects) {742 if (oldFiber && newFiber.alternate === null) {743 // We matched the slot, but we didn't reuse the existing fiber, so we744 // need to delete the existing child.745 deleteChild(returnFiber, oldFiber);746 }747 }748 lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);749 if (previousNewFiber === null) {750 // TODO: Move out of the loop. This only happens for the first run.751 resultingFirstChild = newFiber;752 } else {753 // TODO: Defer siblings if we're not at the right index for this slot.754 // I.e. if we had null values before, then we want to defer this755 // for each null value. However, we also don't want to call updateSlot756 // with the previous one.757 previousNewFiber.sibling = newFiber;758 }759 previousNewFiber = newFiber;760 oldFiber = nextOldFiber;761 }762 if (newIdx === newChildren.length) {763 // We've reached the end of the new children. We can delete the rest.764 deleteRemainingChildren(returnFiber, oldFiber);765 return resultingFirstChild;766 }767 if (oldFiber === null) {768 // If we don't have any more existing children we can choose a fast path769 // since the rest will all be insertions.770 for (; newIdx < newChildren.length; newIdx++) {771 const newFiber = createChild(772 returnFiber,773 newChildren[newIdx],774 expirationTime,775 );776 if (newFiber === null) {777 continue;778 }779 lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);780 if (previousNewFiber === null) {781 // TODO: Move out of the loop. This only happens for the first run.782 resultingFirstChild = newFiber;783 } else {784 previousNewFiber.sibling = newFiber;785 }786 previousNewFiber = newFiber;787 }788 return resultingFirstChild;789 }790 // Add all children to a key map for quick lookups.791 const existingChildren = mapRemainingChildren(returnFiber, oldFiber);792 // Keep scanning and use the map to restore deleted items as moves.793 for (; newIdx < newChildren.length; newIdx++) {794 const newFiber = updateFromMap(795 existingChildren,796 returnFiber,797 newIdx,798 newChildren[newIdx],799 expirationTime,800 );801 if (newFiber !== null) {802 if (shouldTrackSideEffects) {803 if (newFiber.alternate !== null) {804 // The new fiber is a work in progress, but if there exists a805 // current, that means that we reused the fiber. We need to delete806 // it from the child list so that we don't add it to the deletion807 // list.808 existingChildren.delete(809 newFiber.key === null ? newIdx : newFiber.key,810 );811 }812 }813 lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);814 if (previousNewFiber === null) {815 resultingFirstChild = newFiber;816 } else {817 previousNewFiber.sibling = newFiber;818 }819 previousNewFiber = newFiber;820 }821 }822 if (shouldTrackSideEffects) {823 // Any existing children that weren't consumed above were deleted. We need824 // to add them to the deletion list.825 existingChildren.forEach(child => deleteChild(returnFiber, child));826 }827 return resultingFirstChild;828 }829 function reconcileChildrenIterator(830 returnFiber: Fiber,831 currentFirstChild: Fiber | null,832 newChildrenIterable: Iterable<*>,833 expirationTime: ExpirationTime,834 ): Fiber | null {835 // This is the same implementation as reconcileChildrenArray(),836 // but using the iterator instead.837 const iteratorFn = getIteratorFn(newChildrenIterable);838 invariant(839 typeof iteratorFn === 'function',840 'An object is not an iterable. This error is likely caused by a bug in ' +841 'React. Please file an issue.',842 );843 if (__DEV__) {844 // We don't support rendering Generators because it's a mutation.845 // See https://github.com/facebook/react/issues/12995846 if (847 typeof Symbol === 'function' &&848 // $FlowFixMe Flow doesn't know about toStringTag849 newChildrenIterable[Symbol.toStringTag] === 'Generator'850 ) {851 warning(852 didWarnAboutGenerators,853 'Using Generators as children is unsupported and will likely yield ' +854 'unexpected results because enumerating a generator mutates it. ' +855 'You may convert it to an array with `Array.from()` or the ' +856 '`[...spread]` operator before rendering. Keep in mind ' +857 'you might need to polyfill these features for older browsers.',858 );859 didWarnAboutGenerators = true;860 }861 // Warn about using Maps as children862 if ((newChildrenIterable: any).entries === iteratorFn) {863 warning(864 didWarnAboutMaps,865 'Using Maps as children is unsupported and will likely yield ' +866 'unexpected results. Convert it to a sequence/iterable of keyed ' +867 'ReactElements instead.',868 );869 didWarnAboutMaps = true;870 }871 // First, validate keys.872 // We'll get a different iterator later for the main pass.873 const newChildren = iteratorFn.call(newChildrenIterable);874 if (newChildren) {875 let knownKeys = null;876 let step = newChildren.next();877 for (; !step.done; step = newChildren.next()) {878 const child = step.value;879 knownKeys = warnOnInvalidKey(child, knownKeys);880 }881 }882 }883 const newChildren = iteratorFn.call(newChildrenIterable);884 invariant(newChildren != null, 'An iterable object provided no iterator.');885 let resultingFirstChild: Fiber | null = null;886 let previousNewFiber: Fiber | null = null;887 let oldFiber = currentFirstChild;888 let lastPlacedIndex = 0;889 let newIdx = 0;890 let nextOldFiber = null;891 let step = newChildren.next();892 for (893 ;894 oldFiber !== null && !step.done;895 newIdx++, step = newChildren.next()896 ) {897 if (oldFiber.index > newIdx) {898 nextOldFiber = oldFiber;899 oldFiber = null;900 } else {901 nextOldFiber = oldFiber.sibling;902 }903 const newFiber = updateSlot(904 returnFiber,905 oldFiber,906 step.value,907 expirationTime,908 );909 if (newFiber === null) {910 // TODO: This breaks on empty slots like null children. That's911 // unfortunate because it triggers the slow path all the time. We need912 // a better way to communicate whether this was a miss or null,913 // boolean, undefined, etc.914 if (oldFiber === null) {915 oldFiber = nextOldFiber;916 }917 break;918 }919 if (shouldTrackSideEffects) {920 if (oldFiber && newFiber.alternate === null) {921 // We matched the slot, but we didn't reuse the existing fiber, so we922 // need to delete the existing child.923 deleteChild(returnFiber, oldFiber);924 }925 }926 lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);927 if (previousNewFiber === null) {928 // TODO: Move out of the loop. This only happens for the first run.929 resultingFirstChild = newFiber;930 } else {931 // TODO: Defer siblings if we're not at the right index for this slot.932 // I.e. if we had null values before, then we want to defer this933 // for each null value. However, we also don't want to call updateSlot934 // with the previous one.935 previousNewFiber.sibling = newFiber;936 }937 previousNewFiber = newFiber;938 oldFiber = nextOldFiber;939 }940 if (step.done) {941 // We've reached the end of the new children. We can delete the rest.942 deleteRemainingChildren(returnFiber, oldFiber);943 return resultingFirstChild;944 }945 if (oldFiber === null) {946 // If we don't have any more existing children we can choose a fast path947 // since the rest will all be insertions.948 for (; !step.done; newIdx++, step = newChildren.next()) {949 const newFiber = createChild(returnFiber, step.value, expirationTime);950 if (newFiber === null) {951 continue;952 }953 lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);954 if (previousNewFiber === null) {955 // TODO: Move out of the loop. This only happens for the first run.956 resultingFirstChild = newFiber;957 } else {958 previousNewFiber.sibling = newFiber;959 }960 previousNewFiber = newFiber;961 }962 return resultingFirstChild;963 }964 // Add all children to a key map for quick lookups.965 const existingChildren = mapRemainingChildren(returnFiber, oldFiber);966 // Keep scanning and use the map to restore deleted items as moves.967 for (; !step.done; newIdx++, step = newChildren.next()) {968 const newFiber = updateFromMap(969 existingChildren,970 returnFiber,971 newIdx,972 step.value,973 expirationTime,974 );975 if (newFiber !== null) {976 if (shouldTrackSideEffects) {977 if (newFiber.alternate !== null) {978 // The new fiber is a work in progress, but if there exists a979 // current, that means that we reused the fiber. We need to delete980 // it from the child list so that we don't add it to the deletion981 // list.982 existingChildren.delete(983 newFiber.key === null ? newIdx : newFiber.key,984 );985 }986 }987 lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);988 if (previousNewFiber === null) {989 resultingFirstChild = newFiber;990 } else {991 previousNewFiber.sibling = newFiber;992 }993 previousNewFiber = newFiber;994 }995 }996 if (shouldTrackSideEffects) {997 // Any existing children that weren't consumed above were deleted. We need998 // to add them to the deletion list.999 existingChildren.forEach(child => deleteChild(returnFiber, child));1000 }1001 return resultingFirstChild;1002 }1003 function reconcileSingleTextNode(1004 returnFiber: Fiber,1005 currentFirstChild: Fiber | null,1006 textContent: string,1007 expirationTime: ExpirationTime,1008 ): Fiber {1009 // There's no need to check for keys on text nodes since we don't have a1010 // way to define them.1011 if (currentFirstChild !== null && currentFirstChild.tag === HostText) {1012 // We already have an existing node so let's just update it and delete1013 // the rest.1014 deleteRemainingChildren(returnFiber, currentFirstChild.sibling);1015 const existing = useFiber(currentFirstChild, textContent, expirationTime);1016 existing.return = returnFiber;1017 return existing;1018 }1019 // The existing first child is not a text node so we need to create one1020 // and delete the existing ones.1021 deleteRemainingChildren(returnFiber, currentFirstChild);1022 const created = createFiberFromText(1023 textContent,1024 returnFiber.mode,1025 expirationTime,1026 );1027 created.return = returnFiber;1028 return created;1029 }1030 function reconcileSingleElement(1031 returnFiber: Fiber,1032 currentFirstChild: Fiber | null,1033 element: ReactElement,1034 expirationTime: ExpirationTime,1035 ): Fiber {1036 const key = element.key;1037 let child = currentFirstChild;1038 while (child !== null) {1039 // TODO: If key === null and child.key === null, then this only applies to1040 // the first item in the list.1041 if (child.key === key) {1042 if (1043 child.tag === Fragment1044 ? element.type === REACT_FRAGMENT_TYPE1045 : child.elementType === element.type1046 ) {1047 deleteRemainingChildren(returnFiber, child.sibling);1048 const existing = useFiber(1049 child,1050 element.type === REACT_FRAGMENT_TYPE1051 ? element.props.children1052 : element.props,1053 expirationTime,1054 );1055 existing.ref = coerceRef(returnFiber, child, element);1056 existing.return = returnFiber;1057 if (__DEV__) {1058 existing._debugSource = element._source;1059 existing._debugOwner = element._owner;1060 }1061 return existing;1062 } else {1063 deleteRemainingChildren(returnFiber, child);1064 break;1065 }1066 } else {1067 deleteChild(returnFiber, child);1068 }1069 child = child.sibling;1070 }1071 if (element.type === REACT_FRAGMENT_TYPE) {1072 const created = createFiberFromFragment(1073 element.props.children,1074 returnFiber.mode,1075 expirationTime,1076 element.key,1077 );1078 created.return = returnFiber;1079 return created;1080 } else {1081 const created = createFiberFromElement(1082 element,1083 returnFiber.mode,1084 expirationTime,1085 );1086 created.ref = coerceRef(returnFiber, currentFirstChild, element);1087 created.return = returnFiber;1088 return created;1089 }1090 }1091 function reconcileSinglePortal(1092 returnFiber: Fiber,1093 currentFirstChild: Fiber | null,1094 portal: ReactPortal,1095 expirationTime: ExpirationTime,1096 ): Fiber {1097 const key = portal.key;1098 let child = currentFirstChild;1099 while (child !== null) {1100 // TODO: If key === null and child.key === null, then this only applies to1101 // the first item in the list.1102 if (child.key === key) {1103 if (1104 child.tag === HostPortal &&1105 child.stateNode.containerInfo === portal.containerInfo &&1106 child.stateNode.implementation === portal.implementation1107 ) {1108 deleteRemainingChildren(returnFiber, child.sibling);1109 const existing = useFiber(1110 child,1111 portal.children || [],1112 expirationTime,1113 );1114 existing.return = returnFiber;1115 return existing;1116 } else {1117 deleteRemainingChildren(returnFiber, child);1118 break;1119 }1120 } else {1121 deleteChild(returnFiber, child);1122 }1123 child = child.sibling;1124 }1125 const created = createFiberFromPortal(1126 portal,1127 returnFiber.mode,1128 expirationTime,1129 );1130 created.return = returnFiber;1131 return created;1132 }1133 // This API will tag the children with the side-effect of the reconciliation1134 // itself. They will be added to the side-effect list as we pass through the1135 // children and the parent.1136 function reconcileChildFibers(1137 returnFiber: Fiber,1138 currentFirstChild: Fiber | null,1139 newChild: any,1140 expirationTime: ExpirationTime,1141 ): Fiber | null {1142 // This function is not recursive.1143 // If the top level item is an array, we treat it as a set of children,1144 // not as a fragment. Nested arrays on the other hand will be treated as1145 // fragment nodes. Recursion happens at the normal flow.1146 // Handle top level unkeyed fragments as if they were arrays.1147 // This leads to an ambiguity between <>{[...]}</> and <>...</>.1148 // We treat the ambiguous cases above the same.1149 const isUnkeyedTopLevelFragment =1150 typeof newChild === 'object' &&1151 newChild !== null &&1152 newChild.type === REACT_FRAGMENT_TYPE &&1153 newChild.key === null;1154 if (isUnkeyedTopLevelFragment) {1155 newChild = newChild.props.children;1156 }1157 // Handle object types1158 const isObject = typeof newChild === 'object' && newChild !== null;1159 if (isObject) {1160 switch (newChild.$$typeof) {1161 case REACT_ELEMENT_TYPE:1162 return placeSingleChild(1163 reconcileSingleElement(1164 returnFiber,1165 currentFirstChild,1166 newChild,1167 expirationTime,1168 ),1169 );1170 case REACT_PORTAL_TYPE:1171 return placeSingleChild(1172 reconcileSinglePortal(1173 returnFiber,1174 currentFirstChild,1175 newChild,1176 expirationTime,1177 ),1178 );1179 }1180 }1181 if (typeof newChild === 'string' || typeof newChild === 'number') {1182 return placeSingleChild(1183 reconcileSingleTextNode(1184 returnFiber,1185 currentFirstChild,1186 '' + newChild,1187 expirationTime,1188 ),1189 );1190 }1191 if (isArray(newChild)) {1192 return reconcileChildrenArray(1193 returnFiber,1194 currentFirstChild,1195 newChild,1196 expirationTime,1197 );1198 }1199 if (getIteratorFn(newChild)) {1200 return reconcileChildrenIterator(1201 returnFiber,1202 currentFirstChild,1203 newChild,1204 expirationTime,1205 );1206 }1207 if (isObject) {1208 throwOnInvalidObjectType(returnFiber, newChild);1209 }1210 if (__DEV__) {1211 if (typeof newChild === 'function') {1212 warnOnFunctionType();1213 }1214 }...
reconcileChildren.js
Source:reconcileChildren.js
...66 return reconcileChildrenArray(returnFiber, currentFirstChild, newChild, expirationTime);67 }6869 if (getIteratorFn(newChild)) {70 return reconcileChildrenIterator(returnFiber, currentFirstChild, newChild, expirationTime);71 }7273 if (isObject) {74 throwOnInvalidObjectType(returnFiber, newChild);75 }7677 {78 if (typeof newChild === 'function') {79 warnOnFunctionType();80 }81 }82 if (typeof newChild === 'undefined') {83 // If the new child is undefined, and the return fiber is a composite84 // component, throw an error. If Fiber return types are disabled,85 // we already threw above.86 switch (returnFiber.tag) {87 case ClassComponent:88 {89 {90 var instance = returnFiber.stateNode;91 if (instance.render._isMockFunction) {92 // We allow auto-mocks to proceed as if they're returning null.93 break;94 }95 }96 }97 // Intentionally fall through to the next case, which handles both98 // functions and classes99 // eslint-disable-next-lined no-fallthrough100 case FunctionalComponent:101 {102 var Component = returnFiber.type;103 invariant(false, '%s(...): Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null.', Component.displayName || Component.name || 'Component');104 }105 }106 }107108 // Remaining cases are all treated as empty.109 return deleteRemainingChildren(returnFiber, currentFirstChild);110}111112// è°åå个 react element113function reconcileSingleElement(returnFiber, currentFirstChild, element, expirationTime) {114 var key = element.key;115 var child = currentFirstChild;116117 // æ´æ°118 while (child !== null) {119 // TODO: If key === null and child.key === null, then this only applies to120 // the first item in the list.121 if (child.key === key) {122 if (child.tag === Fragment ? element.type === REACT_FRAGMENT_TYPE : child.type === element.type) {123124 // key ç¸å type ç¸åï¼æ¸
é¤workInProgressé¤å½åfiberåèç¹å¤çææåèç¹125 deleteRemainingChildren(returnFiber, child.sibling);126127 // å建ä¸ä¸ªå½åchildçworkInProgress128 var existing = useFiber(child, element.type === REACT_FRAGMENT_TYPE ? element.props.children : element.props, expirationTime);129 existing.ref = coerceRef(returnFiber, child, element);130 existing['return'] = returnFiber;131 {132 existing._debugSource = element._source;133 existing._debugOwner = element._owner;134 }135 return existing;136 } else {137 // keyç¸åï¼typeä¸åï¼æ¸
é¤ææåèç¹138 deleteRemainingChildren(returnFiber, child);139 break;140 }141 } else {142 // å¦ækeyä¸ç¸åï¼ç´æ¥ä»å½åçworkInProgressæ¸
é¤å½åfiberåèç¹ï¼ç»§ç»å¤çä¸ä¸ä¸ªåèç¹143 deleteChild(returnFiber, child);144 }145 child = child.sibling;146 }147148 if (element.type === REACT_FRAGMENT_TYPE) {149 // fragment150 var created = createFiberFromFragment(element.props.children, returnFiber.mode, expirationTime, element.key);151 created['return'] = returnFiber;152 return created;153 } else {154155 // å建å级 fiber ../Fiber.js156 // æ ¹æ®åç»ä»¶ç±»åå建fiber157 var _created4 = createFiberFromElement(element, returnFiber.mode, expirationTime);158 // refç¸å
³ææ¶å¿½ç¥159 _created4.ref = coerceRef(returnFiber, currentFirstChild, element);160 // å
³èç¶çº§ fiberï¼æ¨¡æå½æ°æ è°ç¨ï¼å级å½æ°æ§è¡å®æï¼è°ç¨æ è¿åç¶çº§161 _created4['return'] = returnFiber;162 return _created4;163 }164}165166167168// è°åå¤ä¸ªå级fiberçæ´æ°,çç头æè涨æçæç½çç®æ³169// é¦æ¬¡æå
¥çæ¶åï¼ç´æ¥çæåèç¹ï¼æ·»å fiber.index ä¸è§£é170// æ´æ°çæ¶å171// ä»ç¬¬ä¸ä¸ªåèç¹å¼å§å¤çï¼è·æ°çchildListå表ä¸ç第ä¸ä¸ªå
ç´ æ¯è¾ï¼å¦ækeyå¹é
ï¼æ´æ°ï¼å¼å§å¤ç第äºä¸ªèç¹ï¼ä¾æ¬¡ç±»æ¨ï¼ä¸æ¦ä¸å¹é
ï¼è·³åºå¾ªç¯ï¼ä»å½åèç¹å¼å§ååï¼å
¨é¨æ·»å å°Mapå½ä¸ï¼éåmapåå©ä½çchildListï¼åå¨æ¢æ´æ°ï¼ä¸åå¨æ¢æ°å»ºï¼childListéåå®æä¹åï¼å¦æmapå½ä¸è¿åå¨åèç¹ï¼æ·»å å°å é¤å表172function reconcileChildrenArray(returnFiber, currentFirstChild, newChildren, expirationTime) {173 // This algorithm can't optimize by searching from boths ends since we174 // don't have backpointers on fibers. I'm trying to see how far we can get175 // with that model. If it ends up not being worth the tradeoffs, we can176 // add it later.177178 // Even with a two ended optimization, we'd want to optimize for the case179 // where there are few changes and brute force the comparison instead of180 // going for the Map. It'd like to explore hitting that path first in181 // forward-only mode and only go for the Map once we notice that we need182 // lots of look ahead. This doesn't handle reversal as well as two ended183 // search but that's unusual. Besides, for the two ended optimization to184 // work on Iterables, we'd need to copy the whole set.185186 // In this first iteration, we'll just live with hitting the bad case187 // (adding everything to a Map) in for every insert/move.188189 // If you change this code, also update reconcileChildrenIterator() which190 // uses the same algorithm.191192 {193 // First, validate keys.194 var knownKeys = null;195 for (var i = 0; i < newChildren.length; i++) {196 var child = newChildren[i];197 knownKeys = warnOnInvalidKey(child, knownKeys);198 }199 }200 201 var resultingFirstChild = null;202 var previousNewFiber = null;203
...
ReactChildFiber.new.js
Source:ReactChildFiber.new.js
...483 }484 485 return resultingFirstChild486 }487 function reconcileChildrenIterator(488 returnFiber,489 currentFirstChild,490 newChildrenIterable,491 lanes,492 ) {493 const iteratorFn = getIteratorFn(newChildrenIterable)494 const newChildren = iteratorFn.call(newChildrenIterable)495 // ...496 }497 function reconcileSingleTextNode(498 returnFiber,499 currentFirstChild,500 textContent,501 lanes,502 ) {503 if (currentFirstChild !== null && currentFirstChild.tag === HostText) {504 deleteRemainingChildren(returnFiber, currentFirstChild.sibling)505 const existing = useFiber(currentFirstChild, textContent)506 existing.return = returnFiber507 return existing508 }509 deleteRemainingChildren(returnFiber, currentFirstChild)510 const created = createFiberFromText(textContent, returnFiber.mode, lanes)511 created.return = returnFiber512 return created513 }514 function reconcileSingleElement(515 returnFiber,516 currentFirstChild,517 element,518 lanes,519 ) {520 const key = element.key521 let child = currentFirstChild522 while (child !== null) {523 const elementType = element.type;524 if (child.key === key) {525 const elementType = element.type526 if (elementType === REACT_FRAGMENT_TYPE) {527 if (child.tag === Fragment) {528 deleteRemainingChildren(returnFiber, child.sibling)529 const existing = useFiber(child, element.props.children)530 existing.return = returnFiber531 return existing532 }533 } else {534 if (535 child.elementType === elementType ||536 (537 enableLazyElements &&538 elementType !== null &&539 element.$$typeof === REACT_LAZY_TYPE &&540 resolveLazy(elementType).type === child.type541 )542 ) {543 deleteRemainingChildren(returnFiber, child.sibling)544 const existing = useFiber(child, element.props)545 existing.ref = coerceRef(returnFiber, child, element)546 existing.return = returnFiber547 return existing548 }549 }550 deleteRemainingChildren(returnFiber, child)551 break552 } else {553 deleteChild(returnFiber, child) 554 }555 }556 if (element.type === REACT_FRAGMENT_TYPE) {557 const created = createFiberFromFragment(558 element.props.children,559 returnFiber.mode,560 lanes,561 element.key,562 )563 created.return = returnFiber564 return created565 } else {566 const created = createFiberFromElement(567 element,568 returnFiber.mode,569 lanes,570 )571 created.ref = coerceRef(returnFiber, currentFirstChild, element)572 created.return = returnFiber573 return created574 }575 }576 function reconcileSinglePortal(577 returnFiber,578 currentFirstChild,579 portal,580 lanes,581 ) {582 const key = portal.key583 let child = currentFirstChild584 while (child !== null) {585 if (child.key === key) {586 if (587 child.tag === HostPortal &&588 child.statNode.containerInfo === portal.containerInfo &&589 child.stateNode.implementation === portal.implementation590 ) {591 deleteRemainingChildren(returnFiber, child.sibling)592 const existing = useFiber(child, portal.children || [])593 existing.return = returnFiber594 return existing595 } else {596 deleteRemainingChildren(returnFiber, child)597 break598 }599 }600 child = child.sibling601 }602 const created = createFiberFromPortal(603 portal,604 returnFiber.mode,605 lanes,606 )607 created.return = returnFiber608 return created609 }610 function reconcileChildFibers(611 returnFiber,612 currentFirstChild,613 newChild,614 lanes,615 ) {616 const isUnkeyedTopLevelFragment =617 typeof newChild === 'object' && 618 newChild !== null &&619 newChild.type === REACT_FRAGMENT_TYPE &&620 newChild.key === null621 if (isUnkeyedTopLevelFragment) {622 newChild = newChild.props.children623 }624 const isObject = typeof newChild === 'object' && newChild !== null625 if (isObject) {626 switch (newChild.$$typeof) {627 case REACT_ELEMENT_TYPE:628 return placeSingleChild(629 reconcileSingleElement(630 returnFiber,631 currentFirstChild,632 newChild,633 lanes,634 )635 )636 case REACT_PORTAL_TYPE:637 return placeSingleChild(638 reconcileSinglePortal(639 returnFiber,640 currentFirstChild,641 newChild,642 lanes,643 )644 )645 case REACT_LAZY_TYPE:646 if (enableLazyElements) {647 const payload = newChild._payload648 const init = newChild._init649 return reconcileChildFibers(650 returnFiber,651 currentFirstChild,652 init(payload),653 lanes,654 )655 }656 }657 }658 if (typeof newChild === 'string' || typeof newChild === 'number') {659 return placeSingleChild(660 reconcileSingleTextNode(661 returnFiber,662 currentFirstChild,663 '' + newChild,664 lanes,665 )666 )667 }668 if (isArray(newChild)) {669 return reconcileChildrenArray(670 returnFiber,671 currentFirstChild,672 newChild,673 lanes,674 )675 }676 if (getIteratorFn(newChild)) {677 return reconcileChildrenIterator(678 returnFiber,679 currentFirstChild,680 newChild,681 lanes,682 )683 }684 return deleteRemainingChildren(returnFiber, currentFirstChild);685 }686 return reconcileChildFibers;687}688export const reconcileChildFibers = ChildReconciler(true)689export const mountChildFibers = ChildReconciler(false)690export function cloneChildFibers(current, workInProgress) {691 if (workInProgress.child === null) {...
ReactChildFiber.js
Source:ReactChildFiber.js
...659 lanes660 );661 }662 if (getIteratorFn(newChild)) {663 return reconcileChildrenIterator(664 returnFiber,665 currentFirstChild,666 newChild,667 lanes668 );669 }670 return deleteRemainingChildren(returnFiber, currentFirstChild);671 };672 return reconcileChildFibers;673};674const reconcileChildFibers = ChildReconciler(true);675const mountChildFibers = ChildReconciler(false);...
beginWork.js
Source:beginWork.js
...139 return reconcileChildrenArray(returnFiber, currentFirstChild, newChild, lanes);140 }141 // å¯è¿ä»£å¯¹è±¡142 if (getIteratorFn(newChild)) {143 return reconcileChildrenIterator(returnFiber, currentFirstChild, newChild, lanes);144 }145 }146 if (typeof newChild === 'string' || typeof newChild === 'number') {147 // ææ¬èç¹148 return placeSingleChild(reconcileSingleTextNode(returnFiber, currentFirstChild, '' + newChild, lanes));149 }150 // while(current.sibling) å é¤çæçå
å¼èç¹ - å é¤ï¼æ è®°flags(åeffectTag)ï¼å°fiberæ¨å
¥returnFiberç deletionsä¸151 return deleteRemainingChildren(returnFiber, currentFirstChild);152 }153 return reconcileChildFibers1;...
recileChildren.js
Source:recileChildren.js
...75 expirationTime,76 );77 }78 if (getIteratorFn(newChild)) {79 return reconcileChildrenIterator(80 returnFiber,81 currentFirstChild,82 newChild,83 expirationTime,84 );85 }86 if (isObject) {87 throwOnInvalidObjectType(returnFiber, newChild);88 }89 return deleteRemainingChildren(returnFiber, currentFirstChild);...
templet.js
Source:templet.js
...13//14// In this first iteration, we'll just live with hitting the bad case15// (adding everything to a Map) in for every insert/move.16//17// If you change this code, also update reconcileChildrenIterator() which...
Using AI Code Generation
1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch();4 const context = await browser.newContext();5 const page = await context.newPage();6 const handle = await page.$('text=Get Started');7 const result = await page.evaluate((handle) => {8 const { reconcileChildrenIterator } = require('@playwright/test/lib/utils');9 const children = reconcileChildrenIterator(handle, null, null);10 return [...children];11 }, handle);12 console.log(result);13 await browser.close();14})();15[ { type: 'text', value: 'Get Started' },16 { type: 'text', value: ' ' },17 { type: 'text', value: 'Guide' },18 { type: 'text', value: '19' },20 { type: 'text', value: ' ' },21 { type: 'text', value: 'API' },22 { type: 'text', value: '23' },24 { type: 'text', value: ' ' },25 { type: 'text', value: 'Examples' },26 { type: 'text', value: '27' },28 { type: 'text', value: ' ' },29 { type: 'text', value: 'FAQ' },30 { type: 'text', value: '31' },32 { type: 'text', value: ' ' },33 { type: 'text', value: 'Blog' },34 { type: 'text', value: '35' } ]
Using AI Code Generation
1const { chromium } = require('playwright');2const path = require('path');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 const element = await page.$('input[name="q"]');8 await element.type('hello');9 await element.press('Enter');10 await page.waitForNavigation();11 const element2 = await page.$('input[name="q"]');12 await element2.type('hello');13 await element2.press('Enter');14 await page.waitForNavigation();15 const element3 = await page.$('input[name="q"]');16 await element3.type('hello');17 await element3.press('Enter');18 await page.waitForNavigation();19 await browser.close();20})();21const { chromium } = require('playwright');22const path = require('path');23(async () => {24 const browser = await chromium.launch();25 const context = await browser.newContext();26 const page = await context.newPage();27 const element = await page.$('input[name="q"]');28 await element.type('hello');29 await element.press('Enter');30 await page.waitForNavigation();31 const element2 = await page.$('input[name="q"]');32 await element2.type('hello');33 await element2.press('Enter');34 await page.waitForNavigation();35 const element3 = await page.$('input[name="q"]');36 await element3.type('hello');37 await element3.press('Enter');38 await page.waitForNavigation();39 await browser.close();40})();
Using AI Code Generation
1const { chromium } = require('playwright');2const { Reconciler } = require('playwright/lib/server/supplements/recorder/recorderSupplement');3(async () => {4 const browser = await chromium.launch();5 const page = await browser.newPage();6 const recorder = await page.evaluateHandle(() => window.__playwrightRecorder);7 const reconciler = new Reconciler(recorder);8 const iterator = reconciler.reconcileChildrenIterator();9 for (const { action, target } of iterator) {10 console.log(action, target);11 }12 await browser.close();13})();
Using AI Code Generation
1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch();4 const page = await browser.newPage();5 const iterator = await page.reconcileChildrenIterator();6 console.log(iterator.next());7 console.log(iter
Using AI Code Generation
1const { Reconciler } = require('playwright/lib/server/dom/reconciler');2const { ElementHandle } = require('playwright/lib/server/dom/elementHandle');3const { JSHandle } = require('playwright/lib/server/dom/JSHandle');4const { createJSHandle } = require('playwright/lib/server/dom/elementHandleDispatcher');5const { createHandle } = require('playwright/lib/server/common/JSHandle');6const { parse } = require('playwright/lib/server/dom/parse');7const { serialize } = require('playwright/lib/server/dom/serializers/serializer');8const { toImpl } = require('playwright/lib/server/common/utils');9const { createTestServer } = require('playwright/lib/utils/testserver/');10const { Page } = require('playwright/lib/server/page');11const { Frame } = require('playwright/lib/server/frame');12const { Connection } = require('playwright/lib/server/connection');13const { createTestServer } = require('playwright/lib/utils/testserver/');14const { Page } = require('playwright/lib/server/page');15const { Frame } = require('playwright/lib/server/frame');16const { Connection } = require('playwright/lib/server/connection');17const { createTestServer } = require('playwright/lib/utils/testserver/');18const { Page } = require('playwright/lib/server/page');19const { Frame } = require('playwright/lib/server/frame');20const { Connection } = require('playwright/lib/server/connection');21const { createTestServer } = require('playwright/lib/utils/testserver/');22const { Page } = require('playwright/lib/server/page');23const { Frame } = require('playwright/lib/server/frame');24const { Connection } = require('playwright/lib/server/connection');25const { createTestServer } = require('playwright/lib/utils/testserver/');26const { Page } = require('playwright/lib/server/page');27const { Frame } = require('playwright/lib/server/frame');28const { Connection } = require('playwright/lib/server/connection');29const { createTestServer } = require('playwright/lib/utils/testserver/');30const { Page } = require('playwright/lib/server/page');31const { Frame } = require('playwright/lib/server/frame');32const { Connection } = require('playwright/lib/server/connection');33const { createTestServer } = require('playwright/lib/utils/testserver/');34const { Page } = require('playwright
Using AI Code Generation
1const {reconcileChildrenIterator} = require('playwright-core/lib/server/dom.js');2const {createTestServer} = require('playwright-core/lib/utils/testserver/');3const {getTestState} = require('playwright-core/lib/utils/testrunner/');4const {getTestType} = require('playwright-core/lib/utils/testrunner/');5const {getTestName} = require('playwright-core/lib/utils/testrunner/');6const {registerFixture} = require('playwright-core/lib/utils/testrunner/');7const {registerWorkerFixture} = require('playwright-core/lib/utils/testrunner/');8const {registerParameter} = require('playwright-core/lib/utils/testrunner/');9const {registerWorkerParameter} = require('playwright-core/lib/utils/testrunner/');10const {registerWorkerFixtureCallback} = require('playwright-core/lib/utils/testrunner/');11const {registerFixtureCallback} = require('playwright-core/lib/utils/testrunner/');12const {registerWorkerParameterCallback} = require('playwright-core/lib/utils/testrunner/');13const {registerParameterCallback} = require('playwright-core/lib/utils/testrunner/');14const {setTestDescription} = require('playwright-core/lib/utils/testrunner/');15const {setTestModifier} = require('playwright-core/lib/utils/testrunner/');16const {setTestTimeout} = require('playwright-core/lib/utils/testrunner/');17const {setTestSkip} = require('playwright-core/lib/utils/testrunner/');18const {setTestFixtures} = require('playwright-core/lib/utils/testrunner/');19const {setTestParameters} = require('playwright-core/lib/utils/testrunner/');20const {setTestType} = require('playwright-core/lib/utils/testrunner/');21const {setTestName} = require('playwright-core/lib/utils/testrunner/');22const {setTestLocation} = require('playwright-core/lib/utils/testrunner/');23const {setTestFixture} = require('playwright-core/lib/utils/testrunner/');24const {setTestWorkerIndex} = require('playwright-core/lib/utils/testrunner/');25const {setTestWorkerCount} = require('playwright-core/lib/utils/testrunner/');26const {setTestRetry} = require('playwright-core/lib/utils/testrunner/');27const {setTestExpectedStatus} = require('playwright-core/lib/utils/testrunner/');28const {setTestOutputDir} = require('playwright-core/lib/utils/testrunner/');29const {setTestOutputDirRelative} = require('playwright-core/lib/utils
Using AI Code Generation
1const { chromium } = require('playwright');2const path = require('path');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 await page.fill('#new-todo', 'Hello');8 await page.keyboard.press('Enter');9 await page.fill('#new-todo', 'World');10 await page.keyboard.press('Enter');11 const children = await page.$eval('#todo-list', (el) => {12 const internal = require(path.resolve(process.cwd(), 'node_modules/playwright/lib/server/dom.js')).internal;13 const children = internal.reconcileChildrenIterator(el, [], []);14 return Array.from(children);15 });16 console.log(children);17 await browser.close();18})();
Using AI Code Generation
1const { reconcileChildrenIterator } = require('playwright/lib/server/dom.js');2const { reconcileChildrenIterator } = require('playwright/lib/server/dom.js');3const { reconcileChildrenIterator } = require('playwright/lib/server/dom.js');4const { reconcileChildrenIterator } = require('playwright/lib/server/dom.js');5const { reconcileChildrenIterator } = require('playwright/lib/server/dom.js');6const { reconcileChildrenIterator } = require('playwright/lib/server/dom.js');7const { reconcileChildrenIterator } = require('playwright/lib/server/dom.js');8const { reconcileChildrenIterator } = require('playwright/lib/server/dom.js');9const { reconcileChildrenIterator } = require('playwright/lib/server/dom.js');10const { reconcileChildrenIterator } = require('playwright/lib/server/dom.js');11const { reconcileChildrenIterator } = require('playwright/lib/server/dom.js');12const { reconcileChildrenIterator } = require('playwright/lib/server/dom.js');13const { reconcileChildrenIterator } = require('playwright/lib/server/dom.js');
Using AI Code Generation
1const { Playwright } = require('playwright');2const { reconcileChildrenIterator } = Playwright._internal.reconciler;3const { parse } = require('playwright-core/lib/server/dom').parse;4const a = parse(`5`);6const b = parse(`7`);8const result = reconcileChildrenIterator(a, b);9console.log(result);10 { type: 'insert', index: 1, node: <div>2</div> },11 { type: 'move', from: 2, to: 1 }12 { type: 'insert', index: 1, node: <div>2</div> },13 { type: 'move', from: 2, to: 1 },14 { type: 'move', from: 1, to: 0 }15 { type: 'insert', index: 1, node: <div>2</div> },16 { type: 'move', from: 2, to: 1 },17 { type: 'move', from: 1, to: 0 }
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.
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