如何在ReactJS中的事件上添加或删除className? [英] How to add or remove a className on event in ReactJS?
问题描述
我对React还是很陌生,在将我的想法从标准js转换过来时我很挣扎.
I am quite new to React and I am struggling a little with converting my thinking from standard js.
在我的react组件中,我具有以下元素:
In my react component I have the following element:
<div className='base-state' onClick={this.handleClick}>click here</div>
我要寻找的行为是在点击时添加一个额外的类.我的第一个想法是尝试将类添加到点击处理程序函数中,例如
The behaviour I am looking for is to add an extra class on click. My first idea was to try and add the class in the click handler function e.g.
handleClick : function(e) {
<add class "click-state" here>
}
尽管如此,我仍然找不到能够做任何类似事情的示例,因此,我很确定我没有以正确的方式考虑这个问题.
I haven't been able to find any examples that do anything similar though, so I am fairly sure I am not thinking about this in the right way.
有人能指出我正确的方向吗?
Can anyone point me in the right direction?
推荐答案
类列表可以从组件的状态派生.例如:
The list of classes can be derive from the state of the component. For example:
var Component = React.createClass({
getInitialState: function() {
return {
clicked: false
};
},
handleClick: function() {
this.setState({clicked: true});
},
render: function() {
var className = this.state.clicked ? 'click-state' : 'base-state';
return <div className={className} onClick={this.handleClick}>click here</div>;
}
});
调用 this.setState
将触发组件的重新呈现.
Calling this.setState
will trigger a rerender of the component.
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