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SELECTORS - :parent Selector

The ':parent Selector' is used to select the elements, those are the parents of some text or other element.

Let us simplify with the below example.

Example :

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

  	<body>
    	<h1> JQuery </h1>
    	
    	<div class = "newClass1">
    		<p class = "para1"> First Paragraph </p>
    	</div>
    	
    	<div class = "newClass2">
    		<p class = "newPara"></p>
    	</div>
		    	
    	<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:parent').text("p is a parent and got replaced")
            });
            
      	</script>      
  	</body>
</html>

Output :

So, if you see the above code. We can see that there are two <div> elements, and both has a <p> element in it.

<div class = "newClass1">
	<p class = "para1"> First Paragraph </p>
</div>

<div class = "newClass2">
	<p class = "para2"></p>
</div>

And the <p> element of the second <div> has nothing inside it.

<p class = "para2"></p>

Now, we want to change the contents of the <p> element that is a parent.

And if we see the above code,

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

<p> element is the parent of the text 'First Paragraph'.

And since,

<p class = "para2"></p>

The contents of <p> element is empty, it is not the parent of any text. In other words it is not a parent.

And we only want to change the contents of the <p> element that is a parent.

And this happened with the 'p:parent' element selector.

$('button').click( function() {
	$('p:parent').text("p is a parent and got replaced")
});

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

$('p:parent').text("p is a parent and got replaced")

And the JQuery code locates the <p> element that is the parent and changes its contents.

Similarly, in the next example, we will be checking if a <div> element is a parent and change its contents.

Example :

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

  	<body>
    	<h1> JQuery </h1>
    	
    	<div class = "newClass1">
    		<p class = "para1"> First Paragraph </p>
    	</div>
    	
    	<div class = "newClass2">
    		<p class = "newPara"></p>
    	</div>
		    	
    	<button> Click me </button>

      	<script src = "https://cdnjs.cloudflare.com/ajax/libs/JQUERY/3.3.1/jquery.min.js"> </script>
	  
      	<script>
      
			$('button').click( function() { 
            	$('div:parent').text("div is a parent and got replaced")
            });
            
      	</script>      
  	</body>
</html>

Output :

Now, we are checking if <div> is a parent or not and change its contents accordingly.

$('button').click( function() {
	$('div:parent').text("div is a parent and got replaced")
});

And We can see that there are two <div> elements, and both has a <p> element in it.

<div class = "newClass1">
	<p class = "para1"> First Paragraph </p>
</div>

<div class = "newClass2">
	<p class = "para2"></p>
</div>

So, the contents of both the <div> elements gets changed.

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