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![Users
User
ID
Name
…
User
ID
Name
…
…
[
{ID, Name, …},
{ID, Name, …},
{ID, Name, …},
…
]](https://image.slidesharecdn.com/sirok20150304-150304043226-conversion-gate01/75/SIROK-1-React-76-2048.jpg)
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SIROK技術勉強会 #1 「Reactってなんだ？」
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- 36. 1. Virtual DOMの全更新 2. Virtual DOMの差分計算 3. DOMへの差分適用 ･･･は「DOMの全更新」より速い
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- 38. <!DOCTYPE html> <html> <head> <script src="build/react.js"></script> <scriptsrc="build/JSXTransformer.js"></ script> </head> <body> <div id="example"></div> <script type="text/jsx"> React.render( <h1>Hello, world!</h1>, document.getElementById('example') ); </script> </body> </html>
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- 46. JSX is aJavaScript syntax extension that looks similar to XML.
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- 48. <!DOCTYPE html> <html> <head> <script src="build/react.js"></script> <scriptsrc="build/JSXTransformer.js"></ script> </head> <body> <div id="example"></div> <script type="text/jsx"> React.render( <h1>Hello, world!</h1>, document.getElementById('example') ); </script> </body> </html>
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- 52. npm install -greact-tools JSX JavaScript react.js react-tools 実行
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- 54. <!DOCTYPE html> <html> <head> <script src="build/react.js"></script> <!--<scriptsrc="build/JSXTransformer.js"></ script>--> </head> <body> <div id="example"></div> <script src="build/helloworld.js"></script> </body> </html>
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- 57.
- 58. var Hello =React.createClass({ render() { return ( <div>Hello {this.props.name}</div> ) } }); React.render( <Hello name="World" />, document.getElementById('example') );
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- 60.
- 61. var Hello =React.createClass({ render() { return ( <div>Hello {this.props.name}</div> ) } }); React.render( <Hello name="World" />, document.getElementById('example') );
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- 63. var Hello =React.createClass({ render() { return ( <div>Hello {this.props.name}</div> ) } }); React.render( <Hello name="World" />, document.getElementById('example') );
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- 73. var Hello =React.createClass({ getInitialState() { return { name: 'World' }; }, onClick() { this.setState({ name: this.state.name + '!' }); }, render() { return ( <div> <h1>Hello {this.state.name}</h1> <button onClick={this.onClick}>click</button> </div> ) } });
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- 76. Users User ID Name … User ID Name … … [ {ID, Name, …}, {ID,Name, …}, {ID, Name, …}, … ]
- 77. var User =React.createClass({ render() { return ( <li>Hello {this.props.user.name}</li> ) } });
- 78. var Users =React.createClass({ // …(略)… render() { var users = this.state.users.map((user) => { return <User user={user}/> }); return ( <ul> {users} </ul> ) } });
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