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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<script src="./dist/React.js"></script>
<!--<script src="./test/react.development.js"></script>
<script src="./test/react-dom.development.js"></script>-->
<script src="./test/babel.js"></script>
</head>
<body>
<pre>
"ErrorBoundary constructor",
"ErrorBoundary componentWillMount",
"ErrorBoundary render success",
"RetryErrorBoundary constructor",
"RetryErrorBoundary componentWillMount",
"RetryErrorBoundary render",
"BrokenRender constructor",
"BrokenRender componentWillMount",
"BrokenRender render [!]",
// In Fiber, failed error boundaries render null before attempting to recover
"RetryErrorBoundary componentDidMount",
"RetryErrorBoundary componentDidCatch [!]",
"ErrorBoundary componentDidMount",
// Retry
"RetryErrorBoundary render",
"BrokenRender constructor",
"BrokenRender componentWillMount",
"BrokenRender render [!]",
// This time, the error propagates to the higher boundary
"RetryErrorBoundary componentWillUnmount",
"ErrorBoundary componentDidCatch",
// Render the error
"ErrorBoundary componentWillUpdate",
"ErrorBoundary render error",
"ErrorBoundary componentDidUpdate"
</pre>
<div id='example'></div>
<div id='console'></div>
<script type="text/babel">
var BrokenConstructor;
var BrokenComponentWillMount;
var BrokenComponentDidMount;
var BrokenComponentWillReceiveProps;
var BrokenComponentWillUpdate;
var BrokenComponentDidUpdate;
var BrokenComponentWillUnmount;
var BrokenRenderErrorBoundary;
var BrokenComponentWillMountErrorBoundary;
var BrokenComponentDidMountErrorBoundary;
var BrokenRender;
var ErrorBoundary;
var ErrorMessage;
var NoopErrorBoundary;
var RetryErrorBoundary;
var Normal;
var logger;
var log = [];
logger = function(a){
// console.log(a)
log.push(a)
}
BrokenConstructor = class extends React.Component {
constructor(props) {
super(props);
logger("BrokenConstructor constructor [!]");
throw new Error("Hello");
}
render() {
logger("BrokenConstructor render");
return <div>{this.props.children}</div>;
}
componentWillMount() {
logger("BrokenConstructor componentWillMount");
}
componentDidMount() {
logger("BrokenConstructor componentDidMount");
}
componentWillReceiveProps() {
logger("BrokenConstructor componentWillReceiveProps");
}
componentWillUpdate() {
logger("BrokenConstructor componentWillUpdate");
}
componentDidUpdate() {
logger("BrokenConstructor componentDidUpdate");
}
componentWillUnmount() {
logger("BrokenConstructor componentWillUnmount");
}
};
BrokenComponentWillMount = class extends React.Component {
constructor(props) {
super(props);
logger("BrokenComponentWillMount constructor");
}
render() {
logger("BrokenComponentWillMount render");
return <div>{this.props.children}</div>;
}
componentWillMount() {
logger("BrokenComponentWillMount componentWillMount [!]");
throw new Error("Hello");
}
componentDidMount() {
logger("BrokenComponentWillMount componentDidMount");
}
componentWillReceiveProps() {
logger("BrokenComponentWillMount componentWillReceiveProps");
}
componentWillUpdate() {
logger("BrokenComponentWillMount componentWillUpdate");
}
componentDidUpdate() {
logger("BrokenComponentWillMount componentDidUpdate");
}
componentWillUnmount() {
logger("BrokenComponentWillMount componentWillUnmount");
}
};
BrokenComponentDidMount = class extends React.Component {
constructor(props) {
super(props);
logger("BrokenComponentDidMount constructor");
}
render() {
logger("BrokenComponentDidMount render");
return <div>{this.props.children}</div>;
}
componentWillMount() {
logger("BrokenComponentDidMount componentWillMount");
}
componentDidMount() {
logger("BrokenComponentDidMount componentDidMount [!]");
throw new Error("Hello");
}
componentWillReceiveProps() {
logger("BrokenComponentDidMount componentWillReceiveProps");
}
componentWillUpdate() {
logger("BrokenComponentDidMount componentWillUpdate");
}
componentDidUpdate() {
logger("BrokenComponentDidMount componentDidUpdate");
}
componentWillUnmount() {
logger("BrokenComponentDidMount componentWillUnmount");
}
};
BrokenComponentWillReceiveProps = class extends React.Component {
constructor(props) {
super(props);
logger("BrokenComponentWillReceiveProps constructor");
}
render() {
logger("BrokenComponentWillReceiveProps render");
return <div>{this.props.children}</div>;
}
componentWillMount() {
logger("BrokenComponentWillReceiveProps componentWillMount");
}
componentDidMount() {
logger("BrokenComponentWillReceiveProps componentDidMount");
}
componentWillReceiveProps() {
logger("BrokenComponentWillReceiveProps componentWillReceiveProps [!]");
throw new Error("Hello");
}
componentWillUpdate() {
logger("BrokenComponentWillReceiveProps componentWillUpdate");
}
componentDidUpdate() {
logger("BrokenComponentWillReceiveProps componentDidUpdate");
}
componentWillUnmount() {
logger("BrokenComponentWillReceiveProps componentWillUnmount");
}
};
BrokenComponentWillUpdate = class extends React.Component {
constructor(props) {
super(props);
logger("BrokenComponentWillUpdate constructor");
}
render() {
logger("BrokenComponentWillUpdate render");
return <div>{this.props.children}</div>;
}
componentWillMount() {
logger("BrokenComponentWillUpdate componentWillMount");
}
componentDidMount() {
logger("BrokenComponentWillUpdate componentDidMount");
}
componentWillReceiveProps() {
logger("BrokenComponentWillUpdate componentWillReceiveProps");
}
componentWillUpdate() {
logger("BrokenComponentWillUpdate componentWillUpdate [!]");
throw new Error("Hello");
}
componentDidUpdate() {
logger("BrokenComponentWillUpdate componentDidUpdate");
}
componentWillUnmount() {
logger("BrokenComponentWillUpdate componentWillUnmount");
}
};
BrokenComponentDidUpdate = class extends React.Component {
static defaultProps = {
errorText: "Hello"
};
constructor(props) {
super(props);
logger("BrokenComponentDidUpdate constructor");
}
render() {
logger("BrokenComponentDidUpdate render");
return <div>{this.props.children}</div>;
}
componentWillMount() {
logger("BrokenComponentDidUpdate componentWillMount");
}
componentDidMount() {
logger("BrokenComponentDidUpdate componentDidMount");
}
componentWillReceiveProps() {
logger("BrokenComponentDidUpdate componentWillReceiveProps");
}
componentWillUpdate() {
logger("BrokenComponentDidUpdate componentWillUpdate");
}
componentDidUpdate() {
logger("BrokenComponentDidUpdate componentDidUpdate [!]");
throw new Error(this.props.errorText);
}
componentWillUnmount() {
logger("BrokenComponentDidUpdate componentWillUnmount");
}
};
BrokenComponentWillUnmount = class extends React.Component {
static defaultProps = {
errorText: "Hello"
};
constructor(props) {
super(props);
logger("BrokenComponentWillUnmount constructor");
}
render() {
logger("BrokenComponentWillUnmount render");
return <div>{this.props.children}</div>;
}
componentWillMount() {
logger("BrokenComponentWillUnmount componentWillMount");
}
componentDidMount() {
logger("BrokenComponentWillUnmount componentDidMount");
}
componentWillReceiveProps() {
logger("BrokenComponentWillUnmount componentWillReceiveProps");
}
componentWillUpdate() {
logger("BrokenComponentWillUnmount componentWillUpdate");
}
componentDidUpdate() {
logger("BrokenComponentWillUnmount componentDidUpdate");
}
componentWillUnmount() {
logger("BrokenComponentWillUnmount componentWillUnmount [!]");
throw new Error(this.props.errorText);
}
};
BrokenComponentWillMountErrorBoundary = class extends React.Component {
constructor(props) {
super(props);
this.state = { error: null };
logger("BrokenComponentWillMountErrorBoundary constructor");
}
render() {
if (this.state.error) {
logger("BrokenComponentWillMountErrorBoundary render error");
return <div>Caught an error: {this.state.error.message}.</div>;
}
logger("BrokenComponentWillMountErrorBoundary render success");
return <div>{this.props.children}</div>;
}
componentWillMount() {
logger("BrokenComponentWillMountErrorBoundary componentWillMount [!]");
throw new Error("Hello");
}
componentDidMount() {
logger("BrokenComponentWillMountErrorBoundary componentDidMount");
}
componentWillUnmount() {
logger("BrokenComponentWillMountErrorBoundary componentWillUnmount");
}
componentDidCatch(error) {
logger("BrokenComponentWillMountErrorBoundary componentDidCatch");
this.setState({ error });
}
};
BrokenComponentDidMountErrorBoundary = class extends React.Component {
constructor(props) {
super(props);
this.state = { error: null };
logger("BrokenComponentDidMountErrorBoundary constructor");
}
render() {
if (this.state.error) {
logger("BrokenComponentDidMountErrorBoundary render error");
return <div>Caught an error: {this.state.error.message}.</div>;
}
logger("BrokenComponentDidMountErrorBoundary render success");
return <div>{this.props.children}</div>;
}
componentWillMount() {
logger("BrokenComponentDidMountErrorBoundary componentWillMount");
}
componentDidMount() {
logger("BrokenComponentDidMountErrorBoundary componentDidMount [!]");
throw new Error("Hello");
}
componentWillUnmount() {
logger("BrokenComponentDidMountErrorBoundary componentWillUnmount");
}
componentDidCatch(error) {
logger("BrokenComponentDidMountErrorBoundary componentDidCatch");
this.setState({ error });
}
};
BrokenRenderErrorBoundary = class extends React.Component {
constructor(props) {
super(props);
this.state = { error: null };
logger("BrokenRenderErrorBoundary constructor");
}
render() {
if (this.state.error) {
logger("BrokenRenderErrorBoundary render error [!]");
throw new Error("Hello");
}
logger("BrokenRenderErrorBoundary render success");
return <div>{this.props.children}</div>;
}
componentWillMount() {
logger("BrokenRenderErrorBoundary componentWillMount");
}
componentDidMount() {
logger("BrokenRenderErrorBoundary componentDidMount");
}
componentWillUnmount() {
logger("BrokenRenderErrorBoundary componentWillUnmount");
}
componentDidCatch(error) {
logger("BrokenRenderErrorBoundary componentDidCatch");
this.setState({ error });
}
};
BrokenRender = class extends React.Component {
constructor(props) {
super(props);
logger("BrokenRender constructor");
}
render() {
logger("BrokenRender render [!]");
throw new Error("Hello");
}
componentWillMount() {
logger("BrokenRender componentWillMount");
}
componentDidMount() {
logger("BrokenRender componentDidMount");
}
componentWillReceiveProps() {
logger("BrokenRender componentWillReceiveProps");
}
componentWillUpdate() {
logger("BrokenRender componentWillUpdate");
}
componentDidUpdate() {
logger("BrokenRender componentDidUpdate");
}
componentWillUnmount() {
logger("BrokenRender componentWillUnmount");
}
};
NoopErrorBoundary = class extends React.Component {
constructor(props) {
super(props);
logger("NoopErrorBoundary constructor");
}
render() {
logger("NoopErrorBoundary render");
return <BrokenRender />;
}
componentWillMount() {
logger("NoopErrorBoundary componentWillMount");
}
componentDidMount() {
logger("NoopErrorBoundary componentDidMount");
}
componentWillUnmount() {
logger("NoopErrorBoundary componentWillUnmount");
}
componentDidCatch() {
logger("NoopErrorBoundary componentDidCatch");
}
};
Normal = class extends React.Component {
static defaultProps = {
logName: "Normal"
};
constructor(props) {
super(props);
logger(`${this.props.logName} constructor`);
}
render() {
logger(`${this.props.logName} render`);
return <div>{this.props.children}</div>;
}
componentWillMount() {
logger(`${this.props.logName} componentWillMount`);
}
componentDidMount() {
logger(`${this.props.logName} componentDidMount`);
}
componentWillReceiveProps() {
logger(`${this.props.logName} componentWillReceiveProps`);
}
componentWillUpdate() {
logger(`${this.props.logName} componentWillUpdate`);
}
componentDidUpdate() {
logger(`${this.props.logName} componentDidUpdate`);
}
componentWillUnmount() {
logger(`${this.props.logName} componentWillUnmount`);
}
};
ErrorBoundary = class extends React.Component {
constructor(props) {
super(props);
this.state = { error: null };
logger(`${this.props.logName} constructor`);
}
render() {
if (this.state.error && !this.props.forceRetry) {
logger(`${this.props.logName} render error`);
return this.props.renderError(this.state.error, this.props);
}
logger(`${this.props.logName} render success`);
return <div>{this.props.children}</div>;
}
componentDidCatch(error,info) {
logger(`${this.props.logName} componentDidCatch`);
this.setState({ error });
}
componentWillMount() {
logger(`${this.props.logName} componentWillMount`);
}
componentDidMount() {
logger(`${this.props.logName} componentDidMount`);
}
componentWillReceiveProps() {
logger(`${this.props.logName} componentWillReceiveProps`);
}
componentWillUpdate() {
logger(`${this.props.logName} componentWillUpdate`);
}
componentDidUpdate() {
logger(`${this.props.logName} componentDidUpdate`);
}
componentWillUnmount() {
logger(`${this.props.logName} componentWillUnmount`);
}
};
ErrorBoundary.defaultProps = {
logName: "ErrorBoundary",
renderError(error, props) {
return <div ref={props.errorMessageRef}>Caught an error: {error.message}.</div>;
}
};
RetryErrorBoundary = class extends React.Component {
constructor(props) {
super(props);
logger("RetryErrorBoundary constructor");
}
render() {
logger("RetryErrorBoundary render");
return <BrokenRender />;
}
componentWillMount() {
logger("RetryErrorBoundary componentWillMount");
}
componentDidMount() {
logger("RetryErrorBoundary componentDidMount");
}
componentWillUnmount() {
logger("RetryErrorBoundary componentWillUnmount");
}
componentDidCatch(error) {
logger("RetryErrorBoundary componentDidCatch [!]");
// In Fiber, calling setState() (and failing) is treated as a rethrow.
this.setState({});
}
};
ErrorMessage = class extends React.Component {
constructor(props) {
super(props);
logger("ErrorMessage constructor");
}
componentWillMount() {
logger("ErrorMessage componentWillMount");
}
componentDidMount() {
logger("ErrorMessage componentDidMount");
}
componentWillUnmount() {
logger("ErrorMessage componentWillUnmount");
}
render() {
logger("ErrorMessage render");
return <div>Caught an error: {this.props.message}.</div>;
}
};
</script>
<script type='text/babel'>
var expect = function(a) {
return {
toBe: function(b) {
console.log(a,"\nvs\n", b, a === b)
},
toThrow(b){
try{
a()
}catch(e){
console.log(e.message, b, e.message == b)
return
}
console.log("没有抛错")
}
}
}
var PropTypes = React.PropTypes
var container = document.getElementById("example")
var container1 = document.createElement("div");
var container2 = document.createElement("div");
var container3 = document.createElement("div");
ReactDOM.render(<span>Before 1</span>, container1);
expect(() => {
ReactDOM.render(<BrokenRender />, container2);
}).toThrow("Hello");
ReactDOM.render(
<ErrorBoundary>
<BrokenRender />
</ErrorBoundary>,
container3
);
expect(container1.firstChild.textContent).toBe("Before 1");
expect(container2.firstChild).toBe(null);
expect(container3.firstChild.textContent).toBe("Caught an error: Hello.");
ReactDOM.render(<span>After 1</span>, container1);
ReactDOM.render(<span>After 2</span>, container2);
ReactDOM.render(<ErrorBoundary forceRetry={true}>After 3</ErrorBoundary>, container3);
expect(container1.firstChild.textContent).toBe("After 1");
expect(container2.firstChild.textContent).toBe("After 2");
expect(container3.firstChild.textContent).toBe("After 3");
ReactDOM.unmountComponentAtNode(container1);
ReactDOM.unmountComponentAtNode(container2);
ReactDOM.unmountComponentAtNode(container3);
expect(container1.firstChild).toBe(null);
expect(container2.firstChild).toBe(null);
expect(container3.firstChild).toBe(null);
</script>
</body>
</html>