<div class="textarea-container">
  <label for="message">Your Message</label>
  <textarea id="message" placeholder="Type something long here..." rows="1"></textarea>
</div>

.textarea-container {
  font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  max-width: 500px;
  margin: 0 auto;
}
label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: #374151;
}
textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 1rem;
  line-height: 1.5;
  resize: none;
  overflow: hidden;
  box-sizing: border-box;
  transition: border-color 0.2s;
  min-height: 50px;
}
textarea:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

const textarea = document.getElementById("message");

textarea.addEventListener("input", function() {
  this.style.height = "auto";
  this.style.height = `${this.scrollHeight}px`;
});

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Auto-Expanding Textarea JS

This textarea grows automatically as you type, so scrollbars never hide your text. It improves the user experience on forms and comment sections, and we used just a few lines of JavaScript to make it work.

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#javascript

#css

#form

#textarea

#auto resize

#input

#ui

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Auto-Expanding Textarea JS

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