Example 2 : forwarding refs to an instance of a child component Here we are going to expose a method of the child component to the parent component The parent component can then call the function inside of the child component import React, { useState, useImperativeHandle } from 'react'; ...
在React中,父组件执行子组件的函数的写法如下父组件中添加函数 onRef = (ref) => { this.child = ref } 在使用子组件时 <ChildComponet onRef ={this.onRef} /> onRef是固定的
Example #11Source File: index.tsx From amazon-chime-sdk-smart-video-sending-demo with Apache License 2.0 6 votes Button = forwardRef((props: ButtonProps, ref: React.Ref<HTMLButtonElement>) => ( <StyledButton {...props} className={props.className || ''} as={props.tag} ref={ref} ...
我建议在组件道具中声明children时使用React.ReactNode,以实际匹配任何可以算作任何渲染函数的有效返回值的东西,包括null或string。 为forwardRef提供类型是在括号之前完成的:forwardRef<Type-of-ref, Type-of-Props>(...) An example: interface PopupAPI { open: () => void; close: () => void; } interfac...
Learn how to use the forwardRef function in React to expose DOM nodes inside a component to its parent component.
Let’s see this behavior with a complete example where we are going to attach a reference to an HTML video element and use React buttons to play and pause the video using the native HTML5 APIs of the video element:import ReactDOM from "react-dom"; import React, { Component } from "...
forwardRef is designed to allow HOCs to pass through a ref to the composed component: https://reactjs.org/docs/forwarding-refs.html#forwarding-refs-in-higher-order-components With the latest version of the React types, this can be done like so: import * as React from 'react'; const my...
2. React.createRef()create a ref by calling React.createRef() and attaching a React element to it using the ref attribute on the element.class Example extends React.Component { constructor(props) { super(props) this.exampleRef = React.createRef() // Create the ref ...
Following React TypeScript Cheatsheet the problem is with DataList props. Adding children prop would fix it interface Props extends TestId { children?: ReactNode; focusedItemId?: string; } I have recreated a simple example in this CodeSandbox Share Follow answered Mar 6, 2021 at...
React医生解释得很好。https://reactjs.org/docs/forwarding-refs.html用React.forwardRef Package 组件，...