1import { useEffect } from 'react';
2
3const useScript = url => {
4  useEffect(() => {
5    const script = document.createElement('script');
6
7    script.src = url;
8    script.async = true;
9
10    document.body.appendChild(script);
11
12    return () => {
13      document.body.removeChild(script);
14    }
15  }, [url]);
16};
17
18export default useScript;
19

1import React,{Component} from "react";
2import ReactDOM from "react-dom";
3
4import "./styles.css";
5
6class App extends Component {
7  componentDidMount() {
8    const script = document.createElement("script");    script.async = true;    script.src = "https://some-scripturl.js";    this.div.appendChild(script);  }
9  render() {
10    return (
11      <div className="App" ref={el => (this.div = el)}>        <h1>Hello react</h1>
12        {/* Script is inserted here */}
13      </div>
14    );
15  }
16}
17
18export default App;