class Sample extends React.Component {
constructor(props) {
super(props);
this.handleChild = this.handleChild.bind(this);
this.handleParent = this.handleParent.bind(this);
}
render() {
return (
<div
style={{width: '100%', height: '500px', background: 'white'}}
onClick={this.handleParent}>
<div
style={{ width: '40px', height: '40px', margin: '0 auto', background: 'black'}}
onClick={this.handleChild}>
hello
</div>
</div>
);
}
handleParent(e) {
console.log('parent');
}
handleChild(e) {
console.log('child');
}
}
点击子项时的输出
child
parent
期望输出是
child
我的意思是我只想在点击 child 时触发 child 的 onClick。
parent 工作正常。单击父级时,它仅触发父级的 onClick。 我遇到的问题是 child 。
最佳答案
您需要在子处理程序中停止传播,
handleChild(e) {
e.stopPropagation();
console.log('child');
}
stopPropagation
- Prevents further propagation of the current event in the capturing and bubbling phases.
class Sample extends React.Component {
constructor(props) {
super(props);
this.handleChild = this.handleChild.bind(this);
this.handleParent = this.handleParent.bind(this);
}
render() {
return (
<div
style={{width: '100%', height: '500px', background: 'white'}}
onClick={this.handleParent}>
<div
style={{ width: '40px', height: '40px', margin: '0 auto', background: 'black'}}
onClick={this.handleChild}>
hello
</div>
</div>
);
}
handleParent(e) {
console.log('parent');
}
handleChild(e) {
e.stopPropagation();
console.log('child');
}
}
ReactDOM.render(<Sample />, document.getElementById('app'));
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<div id="app"></div>
关于javascript - 单击子项时触发子项和父项的 onClick,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/39470071/