Check out example codes for "jquery remove css class". It will help you in understanding the concepts better.

Code Example 1

$("p").removeClass( "myClass yourClass" )

Code Example 2

$("button").click(function(){
  $("p").removeClass("intro");
 });

Code Example 3

Basic Syntax:
$(element).removeClass( "myClass yourClass" )
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Html code example:
<p class="red highlight">test1</p>
<p class="red highlight marked">test2</p>
<p class="red highlight">test3</p>
<p class="red highlight">test4</p>

// remove all highlight class from p tag
<script>
	$( "p" ).removeClass( "highlight" )
</script>

// output after execution of this code
<p class="red">test1</p>
<p class="red marked">test2</p>
<p class="red">test3</p>
<p class="red">test4</p>

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