React实践：ReactBasicImgViewer

实现的功能：在点击按钮，显示图片，如图所示：

代码还在不断的完善和更新中，代码详见：https://github.com/EmilyQiRabbit/ReactBasicPicturesViewer

<body>

   <h1>Basic Example</h1>

   <div id="viewerContainer"></div>

   <script src="react/react.js"></script>
   <script src="react/react-dom.js"></script>
   <script src="react/browser.min.js"></script>
   <!-- <script src="react/react-with-addons.js"></script> -->
   <script type="text/babel"> (function(){ // 遮盖层(with img) var BlockModule = React.createClass({ getInitialState: function() { return { ifShowStyle:this.props.ifShowStyle }; },componentWillReceiveProps : function(nextProps){ this.setState( { ifShowStyle : nextProps.ifShowStyle } ); },imgDisappearHandler : function(){ this.setState( { ifShowStyle:{ display: "none" } } ); },render: function() { return ( <div className="blockDiv" style={this.state.ifShowStyle}> <ImgModule imgUrl={this.props.imgUrl}></ImgModule> <div onClick={this.imgDisappearHandler}></div> </div> ) } }); // 图片 var ImgModule = React.createClass({ render: function() { return <img src = {this.props.imgUrl}/>; } }); var EventElement = React.createClass({ getInitialState: function() { return { ifShowStyle: { display: "none" } }; },imgEmergeHandler : function(){ this.setState( { ifShowStyle:{ display: "block" } } ); },render : function(){ return ( <div> <BlockModule imgUrl={this.props.imgUrl} ifShowStyle={this.state.ifShowStyle}></BlockModule> <button className={this.props.ElementButtonClass} onClick={this.imgEmergeHandler}>click To Show Image</button> </div> ) } }); ReactDOM.render( <EventElement imgUrl="imgs/test.jpg" ElementButtonClass="btnclass">click To Show Image</EventElement>,/* imgUrl：图片src ; ElementClass：按钮样式的类名 */ document.getElementById('viewerContainer') ); })() </script>
 </body>

主要知识点：

1、React.createClass

2、state,getInitialState()

3、props

4、onClick事件

5、生命周期函数componentWillReceiveProps

原文链接：https://www.f2er.com/react/303999.html

React实践：ReactBasicImgViewer

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