How to use describeFiber method in Playwright Internal

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ReactFiberComponentStack.js

Source: ReactFiberComponentStack.js Github

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1
2  function describeFiber(fiber) {
3    var owner =  fiber._debugOwner ? fiber._debugOwner.type : null ;
4    var source =  fiber._debugSource ;
5
6    switch (fiber.tag) {
7      case HostComponent:
8        return describeBuiltInComponentFrame(fiber.type);
9
10      case LazyComponent:
11        return describeBuiltInComponentFrame('Lazy');
12
13      case SuspenseComponent:
14        return describeBuiltInComponentFrame('Suspense');
15
16      case SuspenseListComponent:
17        return describeBuiltInComponentFrame('SuspenseList');
18
19      case FunctionComponent:
20      case IndeterminateComponent:
21      case SimpleMemoComponent:
22        return describeFunctionComponentFrame(fiber.type);
23
24      case ForwardRef:
25        return describeFunctionComponentFrame(fiber.type.render);
26
27      case Block:
28        return describeFunctionComponentFrame(fiber.type._render);
29
30      case ClassComponent:
31        return describeClassComponentFrame(fiber.type);
32
33      default:
34        return '';
35    }
36  }
37
38  function getStackByFiberInDevAndProd(workInProgress) {
39    try {
40      var info = '';
41      var node = workInProgress;
42
43      do {
44        info += describeFiber(node);
45        node = node.return;
46      } while (node);
47
48      return info;
49    } catch (x) {
50      return '\nError generating stack: ' + x.message + '\n' + x.stack;
51    }
52  }
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ReactFiberComponentTreeHook.js

Source: ReactFiberComponentTreeHook.js Github

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1/**
2 * Copyright (c) 2016-present, Facebook, Inc.
3 *
4 * This source code is licensed under the MIT license found in the
5 * LICENSE file in the root directory of this source tree.
6 *
7 * @flow
8 */
9
10import type {Fiber} from 'react-reconciler/src/ReactFiber';
11
12import {
13  IndeterminateComponent,
14  FunctionalComponent,
15  ClassComponent,
16  HostComponent,
17} from './ReactTypeOfWork';
18import describeComponentFrame from './describeComponentFrame';
19import getComponentName from './getComponentName';
20
21function describeFiber(fiber: Fiber): string {
22  switch (fiber.tag) {
23    case IndeterminateComponent:
24    case FunctionalComponent:
25    case ClassComponent:
26    case HostComponent:
27      const owner = fiber._debugOwner;
28      const source = fiber._debugSource;
29      const name = getComponentName(fiber);
30      let ownerName = null;
31      if (owner) {
32        ownerName = getComponentName(owner);
33      }
34      return describeComponentFrame(name, source, ownerName);
35    default:
36      return '';
37  }
38}
39
40// This function can only be called with a work-in-progress fiber and
41// only during begin or complete phase. Do not call it under any other
42// circumstances.
43export function getStackAddendumByWorkInProgressFiber(
44  workInProgress: Fiber,
45): string {
46  let info = '';
47  let node = workInProgress;
48  do {
49    info += describeFiber(node);
50    // Otherwise this return pointer might point to the wrong tree:
51    node = node.return;
52  } while (node);
53  return info;
54}
55
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