Created
October 17, 2015 00:52
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Hack to block re-rendering child when parent was updated
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Hack to block re-rendering child when parent was updated</title> | |
| <script src="https://fb.me/react-0.13.0.js"></script> | |
| <script src="https://fb.me/JSXTransformer-0.13.0.js"></script> | |
| </head> | |
| <body> | |
| </body> | |
| <script type="text/jsx"> | |
| var App = React.createClass({ | |
| getInitialState: function() { | |
| return { foo: false }; | |
| }, | |
| handleClick: function() { | |
| this.setState({ foo: !this.state.foo }); | |
| }, | |
| render: function() { | |
| console.log('Rendering App'); | |
| return <div style={this.state.foo ? { backgroundColor: '#ddd' } : {backgroundColor: '#fff'}}> | |
| <button onClick={this.handleClick}>Click me</button> | |
| <p>Lorem ipsum dolor sit amet.</p> | |
| <BlockUpdating><Widget color="blue" text="hello"/></BlockUpdating> | |
| <BlockUpdating><Widget color="red" text="goodbye"/></BlockUpdating> | |
| </div>; | |
| } | |
| }); | |
| var Widget = React.createClass({ | |
| render: function() { | |
| console.log('Rendering Widget', this.props.text); | |
| return <div style={{backgroundColor: this.props.color}}>this.props.text</div>; | |
| } | |
| }); | |
| var BlockUpdating = React.createClass({ | |
| shouldComponentUpdate: function() { | |
| return false; | |
| }, | |
| render: function() { | |
| return <div>{this.props.children}</div>; | |
| } | |
| }); | |
| React.render(<App />, document.body); | |
| </script> | |
| </html> |
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