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
|
import React from 'react';
import ReactDOM from 'react-dom/server';
import StaticHtml from './static-html.js';
const reactTypeof = Symbol.for('react.element');
function errorIsComingFromPreactComponent(err) {
return (
err.message &&
(err.message.startsWith("Cannot read property '__H'") ||
err.message.includes("(reading '__H')"))
);
}
async function check(Component, props, children) {
// Note: there are packages that do some unholy things to create "components".
// Checking the $$typeof property catches most of these patterns.
if (typeof Component === 'object') {
const $$typeof = Component['$$typeof'];
return $$typeof && $$typeof.toString().slice('Symbol('.length).startsWith('react');
}
if (typeof Component !== 'function') return false;
if (Component.prototype != null && typeof Component.prototype.render === 'function') {
return React.Component.isPrototypeOf(Component) || React.PureComponent.isPrototypeOf(Component);
}
let error = null;
let isReactComponent = false;
function Tester(...args) {
try {
const vnode = Component(...args);
if (vnode && vnode['$$typeof'] === reactTypeof) {
isReactComponent = true;
}
} catch (err) {
if (!errorIsComingFromPreactComponent(err)) {
error = err;
}
}
return React.createElement('div');
}
await renderToStaticMarkup(Tester, props, children, {});
if (error) {
throw error;
}
return isReactComponent;
}
async function getNodeWritable() {
let nodeStreamBuiltinModuleName = 'stream';
let { Writable } = await import(nodeStreamBuiltinModuleName);
return Writable;
}
async function renderToStaticMarkup(Component, props, children, metadata) {
delete props['class'];
const vnode = React.createElement(Component, {
...props,
children: children != null ? React.createElement(StaticHtml, { value: children }) : undefined,
});
let html;
if (metadata && metadata.hydrate) {
html = ReactDOM.renderToString(vnode);
if ('renderToReadableStream' in ReactDOM) {
html = await renderToReadableStreamAsync(vnode);
} else {
html = await renderToPipeableStreamAsync(vnode);
}
} else {
if ('renderToReadableStream' in ReactDOM) {
html = await renderToReadableStreamAsync(vnode);
} else {
html = await renderToStaticNodeStreamAsync(vnode);
}
}
return { html };
}
async function renderToPipeableStreamAsync(vnode) {
const Writable = await getNodeWritable();
let html = '';
return new Promise((resolve, reject) => {
let error = undefined;
let stream = ReactDOM.renderToPipeableStream(vnode, {
onError(err) {
error = err;
reject(error);
},
onAllReady() {
stream.pipe(
new Writable({
write(chunk, _encoding, callback) {
html += chunk.toString('utf-8');
callback();
},
destroy() {
resolve(html);
},
})
);
},
});
});
}
async function renderToStaticNodeStreamAsync(vnode) {
const Writable = await getNodeWritable();
let html = '';
return new Promise((resolve) => {
let stream = ReactDOM.renderToStaticNodeStream(vnode);
stream.pipe(
new Writable({
write(chunk, _encoding, callback) {
html += chunk.toString('utf-8');
callback();
},
destroy() {
resolve(html);
},
})
);
});
}
async function renderToReadableStreamAsync(vnode) {
const decoder = new TextDecoder();
const stream = await ReactDOM.renderToReadableStream(vnode);
let html = '';
for await (const chunk of stream) {
html += decoder.decode(chunk);
}
return html;
}
export default {
check,
renderToStaticMarkup,
};
|
