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[英]How do you access react hooks in multiple components? What am I doing wrong with my react hook?
[英]How do you use multiple react components on the same element?
我想將鼠標懸停在div上,將圖像顯示在該div內,顯示它,然后使圖像跟隨我的光標。 懸停組件正在工作,但是我無法使跟隨光標組件工作。 您將如何去做?
組件編號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;
組成部分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;
然后是父組件。
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;
我不知道該如何處理其他組件,您是否可以像這樣在父對象中渲染子對象?
我想將FollowMouse的道具作為img元素的樣式屬性傳遞。
我不是100%肯定會遵循您的問題,也不知道您期望this.props.children
作為函數調用時會做什么,但是如果您想將props添加到child元素中,則可以所以通過React.cloneElement :
const ParentComponent ({children}) => (
<div>
{React.cloneElement(
React.Children.only(children), // clone the only child...
{ style: { left: xPos, top: yPos} } // ...and add new props
)}
</div>
)
鑒於:
<ParentComponent>
<div>Wookies and Hats</div>
</ParentComponent>
子組件將獲得其他道具,等效於:
<ParentComponent>
<div style={{left: xPos, top: yPos}}>Wookies and Hats</div>
</ParentComponent>
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