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Traversal Eq

jquery 

<html>
   <head>
      <title>The jQuery Example</title>
      <script type = "text/javascript" 
         src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">
      </script>
		
      <script type = "text/javascript" language = "javascript">
         $(document).ready(function() {
            $("li").eq(2).addClass("selected");
         });
      </script>
		
      <style>
         .selected { color:red; }
      </style>
   </head>
	
   <body>
      <div>
         <ul>
            <li>list item 1</li>
            <li>list item 2</li>
            <li class = "selected">list item 3</li>
            <li>list item 4</li>
            <li>list item 5</li>
            <li>list item 6</li>
         </ul>
      </div>
   </body>
</html>

Traversing Filter

jquery 

<html>
   <head>
      <title>The jQuery Example</title>
      <script type = "text/javascript" 
         src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">
      </script>

      <script type = "text/javascript" language = "javascript">
         $(document).ready(function() {
            $("li").filter(".middle").addClass("selected");
         });
      </script>
		
      <style>
         .selected { color:red; }
      </style>
   </head>
	
   <body>
      <div>
         <ul>
            <li class = "top">list item 1</li>
            <li class = "top">list item 2</li>
            <li class = "middle">list item 3</li>
            <li class = "middle">list item 4</li>
            <li class = "bottom">list item 5</li>
            <li class = "bottom">list item 6</li>
         </ul>
      </div>
   </body>
</html>

Eq Index

jquery 

<html>
   <head>
      <title>The jQuery Example</title>
      <script type = "text/javascript" 
         src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">
      </script>
		
      <script type = "text/javascript" language = "javascript">
         $(document).ready(function() {
            $("li").eq(2).addClass("selected");
         });
      </script>
		
      <style>
         .selected { color:red; }
      </style>
   </head>
	
   <body>
      <div>
         <ul>
            <li>list item 1</li>
            <li>list item 2</li>
            <li>list item 3</li>
            <li>list item 4</li>
            <li>list item 5</li>
            <li>list item 6</li>
         </ul>
      </div>
   </body>
</html>

Locating Descendant Elements

jquery 

<html>
   <head>
      <title>The JQuery Example</title>
      <script type = "text/javascript" 
         src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">
      </script>
		
      <script type = "text/javascript" language = "javascript">
         $(document).ready(function() {
            $("p").find("span").addClass("selected");
         });
      </script>
		
      <style>
         .selected { color:red; }
      </style>
   </head>
	
   <body>
      <p>This is 1st paragraph and <span>THIS IS RED</span></p>
      <p>This is 2nd paragraph and <span>THIS IS ALSO RED</span></p>
   </body>
</html>

Filtering out Elements Program

jquery 

<html>
   <head>
      <title>The JQuery Example</title>
      <script type = "text/javascript" 
         src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">
      </script>
		
      <script type = "text/javascript" language = "javascript">
         $(document).ready(function() {
            $("li").filter(".middle").addClass("selected");
         });
      </script>
		
      <style>
         .selected { color:red; }
      </style>
   </head>
	
   <body>
      <div>
         <ul>
            <li class = "top">list item 1</li>
            <li class = "top">list item 2</li>
            <li class = "middle">list item 3</li>
            <li class = "middle">list item 4</li>
            <li class = "bottom">list item 5</li>
            <li class = "bottom">list item 6</li>
         </ul>
      </div>
   </body>
</html>

Filtering out Elements

jquery 

<html>
   <head>
      <title>The JQuery Example</title>
      <script type = "text/javascript" 
         src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">
      </script>
		
      <script type = "text/javascript" language = "javascript">
         $(document).ready(function() {
            $("li").eq(2).addClass("selected");
         });
      </script>
		
      <style>
         .selected { color:red; }
      </style>
   </head>
	
   <body>
      <div>
         <ul>
            <li>list item 1</li>
            <li>list item 2</li>
            <li>list item 3</li>
            <li>list item 4</li>
            <li>list item 5</li>
            <li>list item 6</li>
         </ul>
      </div>
   </body>
</html>

Find Elements by index

jquery 

<html>
   <head>
      <title>The JQuery Example</title>
   </head>
	
   <body>
      <div>
         <ul>
            <li>list item 1</li>
            <li>list item 2</li>
            <li>list item 3</li>
            <li>list item 4</li>
            <li>list item 5</li>
            <li>list item 6</li>
         </ul>
      </div>
   </body>
</html>

jQuery Val Val Method

jquery 

<html>
   <head>
      <title>The Selecter Example</title>
      <script type = "text/javascript" 
         src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">
      </script>
   
      <script type = "text/javascript" language = "javascript">
         $(document).ready(function() {
            var content = $("input").val();
            $("input").val( content );
         });
      </script>
   </head>
	
   <body>
      <input type = "text" value = "First Input Box"/><br/>
      <input type = "text" value = "Second Input Box"/>
   </body>
</html>

jQuery Val Method

jquery 

<html>
   <head>
      <title>The Selecter Example</title>
      <script type = "text/javascript" 
         src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">
      </script>
   
      <script type = "text/javascript" language = "javascript">
         $(document).ready(function() {
            var content = $("input").val();
            $("p#pid2").text(content);
         });
      </script>
		
      <style>
         .red { color:red; }
         .green { color:green; }
      </style>
   </head>
	
   <body>
      <input type = "text" value = "First Input Box"/>
      <input type = "text" value = "Second Input Box"/>
      <p class = "green" id = "pid1">This is <i>first paragraph</i>.</p>
      <p class = "red" id = "pid2">This is second paragraph.</p>
   </body>
</html>

jQuery Text Val Method

jquery 

<html>
   <head>
      <title>The Selecter Example</title>
      <script type = "text/javascript" 
         src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">
      </script>
   
      <script type = "text/javascript" language = "javascript">
         $(document).ready(function() {
            var content = $("p#pid1").html();
            $("#pid2").text(content);
         });
      </script>
		
      <style>
         .red { color:red; }
         .green { color:green; }
      </style>
   </head>
	
   <body>
      <p class = "green" id = "pid1">This is <i>first paragraph</i>.</p>
      <p class = "red" id = "pid2">This is second paragraph.</p>
   </body>
</html>

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