1. :not() Selector
          Categories: Selectors > Basic Filter
          not selector
          Description: Selects all elements that do not match the given selector.
          • version added: 1.0jQuery( ":not(selector)" )
            selector: A selector with which to filter by.
              
          All selectors are accepted inside :not(),  for example: :not(div a) and :not(div,a).
              
          Additional Notes
              
          The .not() method will end up providing you with more readable selections than pushing complex selectors or variables into a :not() selector filter. In most cases, it is a better choice.
            
          Example:
          Finds all inputs that are not checked and highlights the next sibling span.  Notice there is no change when clicking the checkboxes since no click events have been linked.
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          <!doctype html>
          <html lang="en">
          <head>
            <meta charset="utf-8">
            <title>not demo</title>
            <script src="https://code.jquery.com/jquery-3.5.0.js"></script>
          </head>
          <body>
           
          <div>
            <input type="checkbox" name="a">
            <span>Mary</span>
          </div>
          <div>
            <input type="checkbox" name="b">
            <span>lcm</span>
          </div>
          <div>
            <input type="checkbox" name="c" checked="checked">
            <span>Peter</span>
          </div>
           
          <script>
          $( "input:not(:checked) + span" ).css( "background-color", "yellow" );
          $( "input").attr( "disabled", "disabled" );
          </script>
           
          </body>
          </html>
          Demo:
            1. 
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