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(UPI) Chapter 9: Understanding the Document Object Model (DOM) with JavaScript

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Instruction

Using ID

An easy-to-use, fast, and exact method to locate an individual element is to mark the element with the id property in the HTML, e.g., <p id="p2">, and use this id as the parameter to getElementById(). The following code snippet will locate the element and display its content.

function show() {
 "use strict";
 const elem = document.getElementById("p2");
 alert(elem.innerHTML);
}
...