我对reactjs中的ref有疑问。抱歉,这很愚蠢,但我仍在学习。好吧,问题是我正在尝试滚动以使用 ref 使用react,但我的问题是因为我想使用多个引用。
我的代码是这样的:
import React, { Component } from "react";
import './App.css';
import { Row, Col,Image,ListGroup,Button,Jumbotron,Container} from 'react-bootstrap';
class App extends Component {
constructor(props) {
super(props)
this.myRef = React.createRef()
this.myRef2 = React.createRef() // Create a ref object
}
handleOnClick = (event) => {
//.current is verification that your element has rendered
window.scrollTo(2, this.myRef2.current.offsetTop)
}
render() {
return (
<div className="App">
<button onClick={this.handleOnClick}>Click me</button>
<Row>
<Col className="menu text-center" lg ={4}>
<div className="picture" >
<Image src={process.env.PUBLIC_URL + '/Images/picture.jpg'} roundedCircle />
</div>
<h1 className="menu-name">Carlos Deseda</h1>
<h4 className="menu-office">Software Engineer - Web Developer</h4>
<div>
<Row>
<Col lg= {3}></Col>
<Col lg= {6} className="menu-text">
<ListGroup >
<ListGroup.Item>ABOUT</ListGroup.Item>
<ListGroup.Item>WORK EXPERIENCE</ListGroup.Item>
<ListGroup.Item>EDUCATION</ListGroup.Item>
<ListGroup.Item>SKILLS </ListGroup.Item>
<ListGroup.Item>CONTACT</ListGroup.Item>
</ListGroup>
</Col>
<Col lg= {3}></Col>
</Row>
</div>
</Col>
<Col className="info text-center" lg ={8}>
<div className="ref1" ref={this.myRef}> FirtsOne </div>
<div className="ref2" ref={this.myRef2}>SecondOne</div>
</Col>
</Row>
</div>
)}
}
export default App;
有了这个
this.myRef = React.createRef()
this.myRef2 = React.createRef()
我可以更改我的 div 的值并且可以工作,但我想知道我是否可以将这两个值加入到像数组这样的一个 react.createRef()
中,或者我不知道。感谢您的帮助!!
最佳答案
而不是像这样创建ref
,
this.myRef = React.createRef()
您可以在构造函数中定义一个空数组,
constructor(props) {
super(props)
this.myRef = [];
}
现在您可以使用callback ref
创建 ref
的模式,
<div className="ref1" ref={(ref) => { this.myRef[0] = ref }}> FirtsOne </div>
<div className="ref2" ref={(ref) => { this.myRef[1] = ref }}>SecondOne</div>
要滚动,您可以使用 scrollIntoView
,
handleOnClick = (event) => {
//.current is verification that your element has rendered
console.log(this.myRef[1]);
this.myRef[1].scrollIntoView();
}
关于javascript - Reactjs 滚动多个引用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57584099/