我想将鼠标悬停在div上,将其显示在该div中,然后显示该图像,然后使该图像跟随我的光标。悬停组件正在工作,但是我无法使跟随光标组件工作。您将如何去做?
组件编号1:
import React from 'react';
class FollowMouse extends React.Component {
state = {
xPos: 0,
yPos: 0
};
onMouseMove(e) {
this.setState({
xPos: e.screenX,
yPos: e.screenY
});
}
render() {
return (
<div
onMouseMove={this.onMouseMove.bind(this)}
className="img-ctn"
>
{this.props.children(this.state.xPos, this.state.yPos)}
</div >
);
}
}
export default FollowMouse;
组件2:
import React from 'react';
class HoverProject extends React.Component {
state = {
isHovered: false,
};
onMouseEnter() {
this.setState({ isHovered: true });
}
onMouseLeave() {
this.setState({ isHovered: false });
}
render() {
return (
<div
onMouseEnter={this.onMouseEnter.bind(this)}
onMouseLeave={this.onMouseLeave.bind(this)}
className="project-item"
>
{this.props.children(this.state.isHovered)}
</div >
);
}
}
export default HoverProject;
,然后是父组件。
import React from 'react';
// modules
import HoverProject from '../modules/HoverProject';
import FollowMouse from '../modules/FollowMouse';
import VLEC from '../images/vlec.png';
class ProjectList extends React.Component {
constructor(props) {
super(props);
this.sels = {
state: 'active'
};
};
render() {
return (
<div className="project-list module">
<div className="sectionTitle">Project I've worked on</div>
{this.props.data.map((res, i) => (
<HoverProject key={i}>
{
isHovered =>
<div className="inner-ctn">
{/* <FollowMouse /> */}
<img className={"project-image " + (isHovered ? this.sels.state : "")} src={VLEC} alt="VLEC" />
<div className="header">
<div className="number">0{res.id + 1}</div>
<div className="name">{res.nomProjet}</div>
</div>
<div className="item-ctn">
<div className="categ">{res.categProjet}</div>
<div className="roles">{res.roles}</div>
<div className="date">{res.date}</div>
</div>
</div>
}
</HoverProject>
))}
</div>
);
}
}
export default ProjectList;
我不知道该如何处理其他组件,您是否可以像这样在父对象中渲染子对象?
我想将FollowMouse的道具作为img元素的样式属性传递。
答案 0 :(得分:0)
我不确定是否100%遵循您的问题,并且不知道您希望this.props.children
作为函数调用时会做什么,但是如果您想向子元素添加道具您可以通过React.cloneElement进行操作:
const ParentComponent ({children}) => (
<div>
{React.cloneElement(
React.Children.only(children), // clone the only child...
{ style: { left: xPos, top: yPos} } // ...and add new props
)}
</div>
)
给出:
<ParentComponent>
<div>Wookies and Hats</div>
</ParentComponent>
子组件将获得其他道具,等效于:
<ParentComponent>
<div style={{left: xPos, top: yPos}}>Wookies and Hats</div>
</ParentComponent>