javascript - Add then remove class after delay but without page refresh - Stack Overflow

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I am adding a class .error on click and now after time interval of 2 seconds I want to remove this class, but without page reload/refresh.I used delay() in jQuery as:

$('#username').addClass('error').delay(2000).removeClass('error');

but it's not working.

Then I tried setTimeout().

It's working, but reloading page. I want something that would add, and then remove, class after specific time but do not refresh/reload the page.

Please help, and thank you in advance.

I am adding a class .error on click and now after time interval of 2 seconds I want to remove this class, but without page reload/refresh.I used delay() in jQuery as:

$('#username').addClass('error').delay(2000).removeClass('error');

but it's not working.

Then I tried setTimeout().

It's working, but reloading page. I want something that would add, and then remove, class after specific time but do not refresh/reload the page.

Please help, and thank you in advance.

• javascript
• jquery
• delay
• settimeout
• removeclass

Share Improve this question Follow edited May 14, 2016 at 19:56 David Thomas 254k5353 gold badges382382 silver badges419419 bronze badges asked May 14, 2016 at 19:52 vinayofficialvinayofficial 48211 gold badge55 silver badges2222 bronze badges 3

• 4 can't use delay() for methods that aren't "queueable" like animations. Please show your code. No reason that setTimeout() would reload page by itself – charlietfl Commented May 14, 2016 at 19:55
• This is my code (and its reloading the page which is not wanted): $('#username').addClass('error').setTimeout(function(){ $(this).removeClass('error'); },2000); – vinayofficial Commented May 14, 2016 at 20:00
• that will throw error because you are trying to chain setTimeout() as jQuery method when it is a global window function. My guess is you are using this in a form submit handler and the error breaks the submit handler and form gets submitted by default process – charlietfl Commented May 14, 2016 at 20:02

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2 Answers 2

Sorted by: Reset to default 5

var element = document.getElementById('username');

element.classList.add('error');

window.setTimeout(function () {
  element.classList.remove('error');
}, 2000);

#username {
  width: 100%;
  height: 50px;
  line-height: 50px;
  color: white;
  background-color: green;
  text-align: center;
  transition: background-color .25s linear;
}
#username.error {
  background-color: red;
}

<div id="username">Username</div>  

Using jquery and setTimeout function:

var $elm = $("#username").addClass("error");
setTimeout(function() {
  $elm.removeClass("error");
}, 2000);

.error{
  color:red;
}

<script src="https://ajax.googleapis./ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="username">USER NAME</div>

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