Web Reference: Mar 2, 2013 · Since ID is always unique (unless u make a mistake) u have no need to use both class and id to select the element. Such an approach is not correct, and should be avoided at all cost. If you want to find all HTML elements that match a specified CSS selector (id, class names, types, attributes, values of attributes, etc), use the querySelectorAll() method. This example returns a list of all elements with class="intro". Mar 10, 2025 · JavaScript has older selection methods to select by id, class, and tags. In this article, you'll learn about these selection methods with the help of examples.
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