有两种方式来实现动态切换字体颜色。
第一种方式
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title></title>
<script src="https://static.runoob.com/assets/react/react-0.14.7/build/react.min.js"></script>
<script src="https://static.runoob.com/assets/react/react-0.14.7/build/react-dom.min.js"></script>
<script src="https://static.runoob.com/assets/react/browser.min.js"></script>
</head>
<body>
<div id="example"></div>
<script type="text/babel">
var LikeButton = React.createClass({
getInitialState: function() {
return {liked: "yellow"};
},
handleClick: function(event) {
this.setState({liked:"blue"});
},
render: function() {
var text = this.state.liked;
var style = {
color:text
}{/*css样式既可以写在组件内也可以写在组件外*/}
return (
<p onClick={this.handleClick} style={style}>{/*这里不能直接用如style={color:"yellow"}这种属性赋予方式*/}
点我，点我，点我我就变身。
</p>
);
}
});
React.render(
<LikeButton />,
document.getElementById('example')
);
</script>
</body>
</html>这种方式只能实现点击一次切换样式。
第二种方式
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title></title>
<script src="https://static.runoob.com/assets/react/react-0.14.7/build/react.min.js"></script>
<script src="https://static.runoob.com/assets/react/react-0.14.7/build/react-dom.min.js"></script>
<script src="https://static.runoob.com/assets/react/browser.min.js"></script>
</head>
<body>
<div id="example"></div>
<script type="text/babel">
var LikeButton = React.createClass({
getInitialState: function() {
return {liked: false};
},
handleClick: function(event) {
this.setState({liked:!this.state.liked});
},
render: function() {
var text = this.state.liked?"yellow":"blue";
var style = {
color:text
}
return (
<p onClick={this.handleClick} style={style}>
你我。点我切换状态。
</p>
);
}
});
React.render(
<LikeButton />,
document.getElementById('example')
);
</script>
</body>
</html>
两者之间没什么多大的区别，主要是第二种运用了三元运算符，实现了点击循环切换的功能。