html5 - Show remaining characters for a text box using javascript -

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this question has answer here:

without editing html file, need show characters remaining maximum of 300 chars. 

<form>     <fieldset>         <div class="formrow clearfix">             <span>                 <label for="comments">comments</label>                 <label for="comments" id="charsleft">(300)</label>             </span>             <textarea name="comments" id="comments" rows="4" cols="40"></textarea>         </div>     </fieldset> </form>

i have function ready im not sure on have in function work.

$(document).ready(function () {     var text_max = 300;     $('#charsleft').html(text_max);      $('#textarea').keyup(function() {         var text_length = $('#textarea').val().length;         var text_remaining = text_max - text_length;          $('#charsleft').html(text_remaining);     }); });

i have searched internet , other solutions try resolve cant seem working. appreciated.

you this

var holder = document.getelementbyid("charsleft"); var commentsinput = document.getelementbyid("comments");  function updateremainingcharacters() {      var charsleft = 300 - commentsinput.value.length;     holder.innertext = "(" + charsleft + ")";  }  commentsinput.addeventlistener('keyup', updateremainingcharacters); commentsinput.addeventlistener('paste', updateremainingcharacters);

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