How to use getElementById() in Javascript

By FoxLearn 12/18/2024 7:11:00 AM   11
The `getElementById()` method in JavaScript is used to select and retrieve an HTML element with a specified `id` attribute.

Here's an example of how to use getElementById() in JavaScript:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>getElementById Example</title>
</head>
<body>
  <h1 id="greeting">Hello, World!</h1>
  <button onclick="changeText()">Click me</button>
  <script>
    function changeText() {
      // Use getElementById to select the element with id "greeting"
      var greetingElement = document.getElementById("greeting");
      // Change the text content of the selected element
      greetingElement.textContent = "Hello, JavaScript!";
    }
  </script>
</body>
</html>

The textContent property sets or returns the text content of the specified node and all its descendants.

In this example, the getElementById("greeting") method selects the <h1> element with the ID "greeting", and the changeText() function changes its text content when the button is clicked.