How to Create a Self-Adjusting Textarea Height with CSS and JavaScript?

Textarea Auto Height: A Comprehensive Guide

When working with textareas, it's often desirable to adjust their height automatically based on the text content to remove excessive scrolling or empty space. Here's a detailed solution using both CSS and JavaScript to achieve this effect:

CSS Styling:

textarea {
  resize: none;
  overflow: hidden;
  line-height: 1.5;
  padding: 15px 15px 30px;
  max-width: 100%;
}

This CSS ensures that the textarea is not resizable, hides any overflow, and sets appropriate line height and padding.

JavaScript Logic:

function auto_grow(element) {
  element.style.height = "5px";
  element.style.height = (element.scrollHeight) + "px";
}

This JavaScript function is used to dynamically adjust the height of the textarea based on its content. It sets an initial height of 5px and then resizes it to the scrollHeight property, which represents the actual height of the text content.

HTML Integration:

<textarea oninput="auto_grow(this)"></textarea>

Attach the oninput event listener to the textarea, which triggers the auto_grow() function whenever the user inputs text.

Implementation:

Combine the CSS styling, JavaScript function, and HTML integration to create a textarea that automatically adjusts its height as you type, providing a more user-friendly and aesthetically pleasing experience.

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