html javascript data attributes
/* index.html <div id="test-div" data-first-name="Tom" data-last-name="Mot" data-active ></div> */ // Reading const div = document.getElementById("test-div"); console.log(div.dataset); /* { active: "" firstName: "Tom" lastName: "Mot" } */ // Writing const div = document.getElementById("test-div"); div.dataset.test = "Hello World!"; console.log(div.dataset.test); // Hello World