MASTERING JAVASCRIPT ELEMENT SELECTION: A GUIDE TO GETELEMENTBYID AND QUERYSELECTOR
In JavaScript, selecting elements is an essential part of manipulating HTML to create interactive web applications. This lesson will cover two popular methods for selecting elements: `getElementById()` and `querySelector()`. 1. getElementById() Overview - `getElementById()` is a method that returns the element with the specified `id` attribute. - It’s a simple way to get a single, unique HTML element since IDs are meant to be unique across a page. Syntax javascript document.getElementById("elementID") elementID:is the `id` of the HTML element you want to select. - `document.getElementById()` returns the element directly if it exists or `null` if it does not. Example Let's say you have the following HTML: ```html <div id="header">Welcome to My Site</div> ``` To access this `div` and change its content: javascript let header = document.getElementById("header"); header.textContent = "Hello, World!"; ``` - Here, we select the element
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