In this video, I break down JavaScript’s querySelectorAll method—the one I use when I want to find and manipulate multiple elements in the DOM fast. querySelectorAll returns a static NodeList of elements that match a group of CSS selectors. The key idea is simple: you can call it on document (or on any element node), pass a string of one or more CSS selectors, and you’ll get back all the matching elements. For example, document.querySelectorAll('div') grabs every div on the page. I also show how I use querySelectorAll with multiple selectors by separating them with commas—like selecting both div and p elements in one shot. Then I go one level deeper with nested selectors, where you target elements inside other elements using a space, like 'div a' to select all anchor tags inside divs. Finally, I cover the practical gotchas: NodeList isn’t a full Array, so if you want array methods, convert it with Array.from(). And if you run querySelectorAll on an element that doesn’t exist, you’ll just get an empty NodeList—so always ensure the element exists before you call it. Master these basics and your DOM manipulation becomes way more effective.