我试图实现悬停事件但是onMouseLeave并不总是在离开元素时触发,特别是在快速移动光标元素时。我试过Chrome,Firefox和Internet Explorer,但在每个浏览器中都出现了同样的问题。
我的代码:
import React from 'react';
import Autolinker from 'autolinker';
import DateTime from './DateTime.jsx'
class Comment extends React.Component{
constructor(props){
super(props);
this.handleOnMouseOver = this.handleOnMouseOver.bind(this);
this.handleOnMouseOut = this.handleOnMouseOut.bind(this);
this.state = {
hovering: false
};
}
render(){
return <li className="media comment" onMouseEnter={this.handleOnMouseOver} onMouseLeave={this.handleOnMouseOut}>
<div className="image">
<img src={this.props.activity.user.avatar.small_url} width="42" height="42" />
</div>
<div className="body">
{this.state.hovering ? null : <time className="pull-right"><DateTime timeInMiliseconds={this.props.activity.published_at} byDay={true}/></time>}
<p>
<strong>
<span>{this.props.activity.user.full_name}</span>
{this.state.hovering ? <span className="edit-comment">Edit</span> : null}
</strong>
</p>
</div>
</li>;
}
handleOnMouseOver(event){
event.preventDefault();
this.setState({hovering:true});
}
handleOnMouseOut(event){
event.preventDefault();
this.setState({hovering:false});
}
newlines(text) {
if (text)
return text.replace(/\n/g, '<br />');
}
}
export default Comment;
答案 0 :(得分:2)
似乎是事件侦听器位于父元素上并且有条件地从DOM中添加/删除子元素时由事件委托引起的问题。将“悬停目标”组件放在所有组件的顶部应该可以使此组件正常工作,但是如果您需要单击其中的元素,则可能导致其他问题。
<Container isOpen={this.state.isOpen}>
<HoverTarget
onMouseEnter={e => this.mouseOver(e)}
onMouseLeave={e => this.mouseOut(e)}
/>
<Content/>
</Container>
mouseOver(e) {
if (!this.state.isOpen) {
this.setState({ isOpen: true });
}
}
答案 1 :(得分:-4)
我有类似的问题,我尝试了不同的方法,我决定采用这种解决方法(部分依赖于jQuery):
$(event.currentTarget).one("mouseleave", this.onMouseLeaveHandler.bind(this));
。以下是一个例子:
import React from 'react';
import $ from 'jquery';
import Autolinker from 'autolinker';
import DateTime from './DateTime.jsx'
class Comment extends React.Component{
constructor(props){
super(props);
this.state = {
hovering: false
};
}
render(){
return <li className="media comment" onMouseEnter={this.handleOnMouseOver.bind(this)}>
<div className="image">
<img src={this.props.activity.user.avatar.small_url} width="42" height="42" />
</div>
<div className="body">
{this.state.hovering ? null : <time className="pull-right"><DateTime timeInMiliseconds={this.props.activity.published_at} byDay={true}/></time>}
<p>
<strong>
<span>{this.props.activity.user.full_name}</span>
{this.state.hovering ? <span className="edit-comment">Edit</span> : null}
</strong>
</p>
</div>
</li>;
}
handleOnMouseOver(event){
event.preventDefault();
this.setState({hovering:true});
$(event.currentTarget).one("mouseleave", this.onMouseLeaveHandler.bind(this));
}
handleOnMouseOut(event){
event.preventDefault();
this.setState({hovering:false});
}
newlines(text) {
if (text)
return text.replace(/\n/g, '<br />');
}
}
export default Comment;
或者在jsfiddle上查看此示例:http://jsfiddle.net/qtbr5cg6/1/