-
Notifications
You must be signed in to change notification settings - Fork 79
/
parseReactElement.js
142 lines (123 loc) · 4.03 KB
/
parseReactElement.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
/* @flow */
import React, { type Element as ReactElement, Fragment } from 'react';
import {
ForwardRef,
isContextConsumer,
isContextProvider,
isForwardRef,
isLazy,
isMemo,
isProfiler,
isStrictMode,
isSuspense,
Memo,
} from 'react-is';
import type { Options } from './../options';
import {
createStringTreeNode,
createNumberTreeNode,
createReactElementTreeNode,
createReactFragmentTreeNode,
} from './../tree';
import type { TreeNode } from './../tree';
const supportFragment = Boolean(Fragment);
const getFunctionTypeName = (functionType): string => {
if (!functionType.name || functionType.name === '_default') {
return 'No Display Name';
}
return functionType.name;
};
const getWrappedComponentDisplayName = (Component: *): string => {
switch (true) {
case Boolean(Component.displayName):
return Component.displayName;
case Component.$$typeof === Memo:
return getWrappedComponentDisplayName(Component.type);
case Component.$$typeof === ForwardRef:
return getWrappedComponentDisplayName(Component.render);
default:
return getFunctionTypeName(Component);
}
};
// heavily inspired by:
// https://github.com/facebook/react/blob/3746eaf985dd92f8aa5f5658941d07b6b855e9d9/packages/react-devtools-shared/src/backend/renderer.js#L399-L496
const getReactElementDisplayName = (element: ReactElement<*>): string => {
switch (true) {
case typeof element.type === 'string':
return element.type;
case typeof element.type === 'function':
if (element.type.displayName) {
return element.type.displayName;
}
return getFunctionTypeName(element.type);
case isForwardRef(element):
case isMemo(element):
return getWrappedComponentDisplayName(element.type);
case isContextConsumer(element):
return `${element.type._context.displayName || 'Context'}.Consumer`;
case isContextProvider(element):
return `${element.type._context.displayName || 'Context'}.Provider`;
case isLazy(element):
return 'Lazy';
case isProfiler(element):
return 'Profiler';
case isStrictMode(element):
return 'StrictMode';
case isSuspense(element):
return 'Suspense';
default:
return 'UnknownElementType';
}
};
const noChildren = (propsValue, propName) => propName !== 'children';
const onlyMeaningfulChildren = (children): boolean =>
children !== true &&
children !== false &&
children !== null &&
children !== '';
const filterProps = (originalProps: {}, cb: (any, string) => boolean) => {
const filteredProps = {};
Object.keys(originalProps)
.filter(key => cb(originalProps[key], key))
.forEach(key => (filteredProps[key] = originalProps[key]));
return filteredProps;
};
const parseReactElement = (
element: ReactElement<*> | string | number,
options: Options
): TreeNode => {
const { displayName: displayNameFn = getReactElementDisplayName } = options;
if (typeof element === 'string') {
return createStringTreeNode(element);
} else if (typeof element === 'number') {
return createNumberTreeNode(element);
} else if (!React.isValidElement(element)) {
throw new Error(
`react-element-to-jsx-string: Expected a React.Element, got \`${typeof element}\``
);
}
const displayName = displayNameFn(element);
const props = filterProps(element.props, noChildren);
if (element.ref !== null) {
props.ref = element.ref;
}
const key = element.key;
if (typeof key === 'string' && key.search(/^\./)) {
// React automatically add key=".X" when there are some children
props.key = key;
}
const defaultProps = filterProps(element.type.defaultProps || {}, noChildren);
const childrens = React.Children.toArray(element.props.children)
.filter(onlyMeaningfulChildren)
.map(child => parseReactElement(child, options));
if (supportFragment && element.type === Fragment) {
return createReactFragmentTreeNode(key, childrens);
}
return createReactElementTreeNode(
displayName,
props,
defaultProps,
childrens
);
};
export default parseReactElement;