<div class="input-wrapper">
  <label>Tweet / Status</label>
  <textarea id="txtInput" maxlength="280" rows="4" placeholder="What is happening?"></textarea>
  <div class="counter-info">
    <span id="charCount">0</span> / 280
  </div>
</div>

.input-wrapper {
  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;
  resize: vertical;
  box-sizing: border-box;
  outline: none;
  transition: border-color 0.2s;
}
textarea:focus {
  border-color: #3b82f6;
}
textarea.limit-near {
  border-color: #f59e0b;
}
textarea.limit-reached {
  border-color: #ef4444;
}
.counter-info {
  text-align: right;
  font-size: 0.85rem;
  color: #6b7280;
  margin-top: 5px;
}

const input = document.getElementById("txtInput");
const countSpan = document.getElementById("charCount");
const limit = 280;

input.addEventListener("input", function() {
  const currentLength = this.value.length;
  countSpan.innerText = currentLength;
  
  if (currentLength >= limit) {
    this.classList.add("limit-reached");
    countSpan.style.color = "#ef4444";
  } else {
    this.classList.remove("limit-reached");
    countSpan.style.color = "#6b7280";
  }
});

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Input Character Counter JS

Count the characters as your user types. We show a limit indicator that turns red when they type too much, so they know exactly how much space is left in the form field.

377

#javascript

#css

#form

#input

#textarea

#character count

#limit

#validation

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Input Character Counter JS

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