Question 35595 in Jquery Question posted in
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Disable submit button when Tags Input on textarea is empty – Jquery

I created a form where users can input words in a textarea as tags and submit them as a string using JavaScript. The feature I want to add is to disable the submit button whenever the textarea is empty (does not contain any tags).

Here is what I have tried so far:

HTML

<form>
  <textarea onkeyup="success()" name="tags" id="tag-input1" required>
  </textarea>
  <p class="instruction">Press enter to add a new word</p>
  <!-- Disable Submit Button -->
  <input type="submit" id="submit" class="save" value="Submit">
</form>

JavaScript

function success() {
  if (document.getElementById("tag-input1").value === "") {
    document.getElementById('submit').disabled = true;
  } else {
    document.getElementById('submit').disabled = false;
  }
}

DEMO

Tags:

2

Answers


  1. 0

    I think you could check value length.
    At first, try to add disabled attribute to your submit button in html.

     <input type="submit" id="submit" class="save" value="Submit" disabled="true">

    Then in here is your success function code;

        function success() {
      document.getElementById('submit').disabled = !document.getElementById("tag-input1").value.length;
    }
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  2. 0

    As per my knowledge, that is not how disable works. Disable is a html attribute that stops user from writing data in the perticular text.
    Try providing error message when value of perticular message is empty
    You can use conditional statements for that

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