ReactJs: Unable to focus on element programmatically using React.createRef()-CodePudding

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ReactJs: Unable to focus on element programmatically using React.createRef()

Time：10-14

The

But, in my app, I need to do it programmatically, so I tried this:

import React, { Component } from "react"; import { connect } from "react-redux"; import { Container } from "reactstrap"; import ArrowKeysReact from "arrow-keys-react"; export class TestComponent extends Component { constructor(props) { super(props); this.state = {}; this.canvas_dom_element = React.createRef(); this.focus = this.focus.bind(this); ArrowKeysReact.config({ left: () => { console.log( "

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