How to select an Element in JavaScript
// Selecting an Element by id: document.getElementById("elem-id"); // Selecting Elements by class: document.getElementsByClassName("elem-class"); // Selecting Elements by tag name: document.getElementsByTagName("div"); // Selecting Elements by name: document.getElementsByName("elem-name"); /* This method is like a jQuery selector ( #elemId -> id, .elemClass -> class, h1 -> tag name) */ document.querySelector(".container"); // class document.querySelector("#demo"); // id document.querySelector("div"); // tag name