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SELECTORS - attribute!=value Selector

The 'attribute!=value Selector' is used to select the elements, that doesn't match a particular attribute with a specific value.

Say, for example, <p>, <div>, <h1> e.t.c. are called elements in HTML.

And the <p> or <div> element can have a 'class' or 'id'.

<p class = "para1"> First Paragraph </p>

These 'class' or 'id' are called as attribute in HTML.

Let us learn more with the below example.

Example :

<html>
  	<head>
    	<title> My First Programme </title>
  	</head>

  	<body>
    	<h1> JQuery </h1>
    
    	<p class = "para1"> First Paragraph </p>
    	<p class = "newPara"> Next Paragraph </p>
   		<p id = "nextPara"> New Next Paragraph </p>
    	
    	<button> Click me </button>

      	<script src = "https://cdnjs.cloudflare.com/ajax/libs/JQUERY/3.3.1/jquery.min.js"> </script>
	  
      	<script>
      
			$('button').click( function() { 
            	$('p[class != "newPara"]').text("The contents of the elements with attribute value that is not class=newPara got changed")
            });
            
      	</script>      
  	</body>
</html>

Output :

So, if you see the above code. We can see that there are three <p> elements, where the first two <p> elements has a 'class' attribute.

<p class = "para1"> First Paragraph </p>
<p class = "newPara"> Next Paragraph </p>

And the third <p> element has an 'id' attribute in it.

<p id = "nextPara"> New Next Paragraph </p>

And we only want to change the contents of those <p> elements that doesn't have 'class = "newPara"' attribute in it.

And as we can see,

<p class = "para1"> First Paragraph </p>

And

<p id = "nextPara"> New Next Paragraph </p>

Doesn't have 'class = "newPara"'. So, JQuery would be changing the contents of them.

And this happened with the '[class != "newPara"]' element selector.

$('button').click( function() {
	$('p[class != "newPara"]').text("The contents of the elements with attribute value that is not class=newPara got changed")
});

The moment the button is clicked, JQuery statement gets triggered.

$('p[class != "newPara"]').text("The contents of the elements with attribute value that is not class=newPara got changed")

And the JQuery code locates the elements with class attribute 'class = "newPara"' and keeps it as is.

And changes the contents of,

<p class = "para1"> First Paragraph </p>

And

<p id = "nextPara"> New Next Paragraph </p>

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