javascript - Removing border when the form field is in focus -

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i making border appear form field during form validation. appending error class name div class name achieve it:

document.getelementbyid("name").classname = document.getelementbyid("name").classname + " error";  document.getelementbyid("email").classname = document.getelementbyid("email").classname + " error";     &.error {     border:3px solid #cc4337;     transition:#cc4337 .2s linear 0;     -webkit-transition:#cc4337 .2s linear 0;     -moz-transition:#cc4337 .2s linear 0; }

now, when click onto form field retype want border disappear. there way can remove error (or style border:none) class name tracking field focused?

thanks

try

&.error:focus{   border: none;   border-color: transparent; }

or try

document.getelementbyid(id).style.property=new style

eg.

<script>     document.getelementbyid("error").style.border-color = "transparent"; </script>

and possibly implement using like

 <input type="text" id="fname" onfocus="myfunction(this.id)">

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