How can getElementById be utilized in JavaScript to manipulate text within a textarea?

To manipulate text within a textarea using getElementById in JavaScript, you can retrieve the textarea element using its ID and then set its value property to the desired text. This allows you to dynamically change the text content of the textarea based on user input or other events. ```javascript // Retrieve the textarea element by its ID var textarea = document.getElementById("textareaId"); // Set the text content of the textarea textarea.value = "New text content"; ```