How to introduce an external js file into the react component?

problem description

how to introduce the official account of Wechat"s js file ( http://res.wx.qq.com/open/js/.)

into a component of the React project

introduced in index.html is introduced throughout the project. I only want to introduce it in the current component. What should I do?

React.js
Apr.09,2021

recommends two imported methods, of course, you can write a JS class (ES6 syntax) to dynamically insert JS into the page, and then introduce it in the React project.

first: use the plug-in react-load-script,. If you don't have it installed, you can use yarn add react-load-script or npm install react-load-script, to see which package management tool you use.

then you can insert the following code in JS, as you would with the React component. 

import React from 'react';
import Script from 'react-load-script';

class DynamicScriptExample extends React.Component {
    constructor(props) {
        super(props);
        this.state = {
            scriptStatus: 'no'
        }
    }

    handleScriptCreate() {
      this.setState({ scriptLoaded: false })
    }
     
    handleScriptError() {
      this.setState({ scriptError: true })
    }
     
    handleScriptLoad() {
      this.setState({ scriptLoaded: true, scriptStatus: 'yes' })
    }

    render() {
        return (
            <>
            <Script
              url="https://cdn.staticfile.org/jquery/3.3.1/jquery.min.js"
              onCreate={this.handleScriptCreate.bind(this)}
              onError={this.handleScriptError.bind(this)}
              onLoad={this.handleScriptLoad.bind(this)}
            />
            <div>:{this.state.scriptStatus}</div>
            </>
        );
    }
}

export default DynamicScriptExample;

the second is introduced directly in the index.html under the project / Public directory.

roughly means something like this 

export default function getAMap() {
  var isLoaded = true
  return new Promise(function (resolve, reject) {
    if (isLoaded) {
      window.AMap.plugin(['AMap.MouseTool', 'AMap.PolyEditor'], () => {
        resolve(window.AMap)
      })
      return
    }
    
    var script = document.createElement('script')
    script.type = 'text/javascript'
    script.async = true
    script.src = 'http://webapi.amap.com/maps?v=1.4.3&key=key&callback=$$$maptcinit&plugin=AMap.MouseTool'
    // script.onload = resolve
    script.onerror = reject
    script.onload = function () {
      isLoaded = true
      resolve(window.AMap)
    }
    document.head.appendChild(script)
  })
}

what's wrong with the global situation? Wechat just recommends that you use global

to learn about createObjectUrl

.

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