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Editorial Team
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Asked: 2026-05-15T10:05:21+00:00

How to add css styles inside <body> or <head> , placed in javascript file

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How to add css styles inside <body> or <head>, placed in javascript file like this:

<style type="text/css">
    .popup-bg {
        position: fixed;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        background: #eee;
    }
</style>

The only way is to write css inside javascript, there is no access to html or any external css.

Thanks.

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1 Answer

  1. Editorial Team

    Use addClass method of jquery:

    $('body').addClass('popup-bg');

    Update:

      $(function(){
    $('head').append('
      <style type="text/css">
        .popup-bg {
            position: fixed;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background: #eee;
        }
      </style>
    ');
  });
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