React.js implements dynamic font color switching description
This article describes how react.js implements dynamic font color switching. Students who are not familiar with react.js implementing dynamic font color switching can take a look at this article with us. Stop talking nonsense. Let’s take a look directly at how react.js implements dynamic font color switching!
There are two ways to dynamically switch font colors.
The first method
<!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>
<p id="example"></p>
<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>This method can only switch styles with one click.
The second method
<!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>
<p id="example"></p>
<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>There is not much difference between the two. The main reason is that the second method uses the ternary operation operator to achieve click Loop switching function.
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react.js gives the identifier ref and gets the content
Use a very simple example to understand the idea of react.js high-order components
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