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

Textarea Auto Height

When it comes to Textarea elements, managing their height can be crucial for improving user experience and maintaining the aesthetics of your web applications. Sometimes, you may want your textarea height to adjust automatically based on the amount of text it contains.

One effective solution for achieving this is through JavaScript and CSS. Here's a step-by-step guide to implementing it:

JavaScript:

1. Create a JavaScript function to calculate and update the textarea's height:

function auto_grow(element) {
  // Set the initial height to a small value (e.g., 5px)
  element.style.height = "5px";

  // Calculate the new height based on the scrollHeight property
  element.style.height = (element.scrollHeight) + "px";
}

CSS:

2. Style the textarea to prevent vertical scrolling and set minimal dimensions:

textarea {
  resize: none;
  overflow: hidden;
  min-height: 50px;
  max-height: 100px;
}

HTML:

3. Add the event listener to call the auto_grow function when the textarea content changes:

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

By implementing this solution, the textarea's height will automatically adjust as text is entered or removed, providing a dynamic and convenient user experience.

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