<div id="box" class="active"></div> const element = document.querySelector("#box"); // Check if hasclass // Result is a boolean element.classList.contains("active"); true
const apps = ["phone", "calculator", "clock"]; apps.at(-1); "clock"
<div id="box"></div> const element = document.querySelector("#box"); element.classList.add("active", "highlighted"); <div id="box" class="active highlighted"></div>
const text = "codetogo saved me tons of time"; text.replace(/ /g, "-"); codetogo-saved-me-tons-of-time
const people = ["Sam", "Alex", "Charlie"]; people.forEach(person => { console.log(person); }); Sam Alex Charlie
<div id="box"></div> const element = document.querySelector("#box"); element.addEventListener("click", event => { console.log("Element clicked"); });