Pierre314

Hi, I am a noobie and I try to create a collapsible element in my React app. I use the code from W3S (https://www.w3schools.com/howto/howto_js_collapsible.asp) in one my JS file, the CSS part works fine but the JS part does not seem to wrok (the panel does not appear or collapse). I must be wrong with how to implement JS in React, even if it is surely utra basic. What should I modify to make it work? Thousand thanks import React, { Component } from "react"; import Style from "./Aside.module.scss"; let coll = document.getElementsByClassName("collapsible"); let i; export default class Aside extends Component { render() { for (i = 0; i < coll.length; i++) { coll[i].addEventListener("click", function () { this.classList.toggle("active"); let content = this.nextElementSibling; if (content.style.display === "block") { content.style.display = "none"; } else { content.style.display = "block"; } }); } return ( <div className={Style.aside}> <h2>NAVIGATION</h2> <button type="button" class={Style.collapsible}> Open Collapsible </button> <div class={Style.content}> <p>Lorem ipsum...</p> </div> </div> ); } }