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Traverse Slice Example

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").slice(2, 5).addClass("selected");
         });
      </script>
		
      <style>
         .selected { color:red; }
      </style>
   </head>
	
   <body>
      <div>
		
         <ul>
            <li class = "above">list item 0</li>
            <li class = "top">list item 1</li>
            <li class = "selected">list item 2</li>
            <li class = "selected">list item 3</li>
            <li class = "selected">list item 4</li>
            <li class = "bottom">list item 5</li>
            <li class = "bottom">list item 6</li>
            <li class = "below">list item 7</li>
         </ul>
			
      </div>
   </body>
</html>

Another Example of Not Traverse

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").not(".middle").addClass("selected");
         });
      </script>
		
      <style>
         .selected { color:red; }
      </style>
   </head>
	
   <body>
      <div>
         <ul>
            <li class = "selected">list item 1</li>
            <li class = "selected">list item 2</li>
            <li class = "middle">list item 3</li>
            <li class = "middle">list item 4</li>
            <li class = "selected">list item 5</li>
            <li class = "selected">list item 6</li>
         </ul>
      </div>
   </body>
</html>

Traverse Children

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>
         $(document).ready(function(){
            $("div").children(".selected").addClass("blue");
         });
      </script>
		
      <style>
         .blue { color:blue; }
      </style>
   </head>
	
   <body>
      <div>
         <span>Hello</span>
         <p class = "selected">Hello Again</p>
         <div class = "selected">And Again</div>
         <p class = "biggest">And One Last Time</p>
      </div>
   </body>
</html>

Traverse AndSelf

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>
         $(document).ready(function(){
            $("div").find("p").andSelf().addClass("border");
         });
      </script>
		
      <style>
         p, div { margin:5px; padding:5px; }
         .border { border: 2px solid red; }
         .background { background:yellow; }
      </style>	
   </head>
	
   <body>
      <div>
         <p>First Paragraph</p>
         <p>Second Paragraph</p>
      </div>
   </body>
</html>

Traverse Add

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() {
            $(".top").add(".middle").addClass("selected");
         });
      </script>
		
      <style>
         .selected { color:red; }
      </style>
   </head>
	
   <body>
      <div>
         <ul>
            <li class = "above">list item 0</li>
            <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>
            <li class = "below">list item 7</li>
         </ul>
      </div>
   </body>
</html>

Traverse Slice

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").slice(2, 5).addClass("selected");
         });
      </script>
		
      <style>
         .selected { color:red; }
      </style>
   </head>
	
   <body>
      <div>
		
         <ul>
            <li class = "above">list item 0</li>
            <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>
            <li class = "below">list item 7</li>
         </ul>
			
      </div> 
   </body>
</html>

Traverse Not

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").not(".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>

Traverse Map

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(){
			
            var mappedItems = $("li").map(function (index) {
               var replacement = $("<li>").text($(this).text()).get(0);
				
               if (index == 0) {
                  // make the first item all caps
                  $(replacement).text($(replacement).text().toUpperCase());
               } else if (index == 1 || index == 3) {
                  // delete the second and fourth items
                  replacement = null;
               } else if (index == 2) {
                  // make two of the third item and add some text
                  replacement = [replacement,$("<li>").get(0)];
                  $(replacement[0]).append("<b> - A</b>");
                  $(replacement[1]).append("Extra <b> - B</b>");
               }

               // replacement will be an dom element, null, 
               // or an array of dom elements
               return replacement;
            });
				
            $("#results").append(mappedItems);
         });
      </script>
		
      <style>
         body { font-size:16px; }
         ul { float:left; margin:0 30px; color:blue; }
         #results { color:red; }
      </style>
   </head>
	
   <body>

      <ul>
         <li>First</li>
         <li>Second</li>
         <li>Third</li>
         <li>Fourth</li>
         <li>Fifth</li>
      </ul>
		
      <ul id = "results">
      </ul>
		
   </body>
</html>

Traverse Is Selector

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").click(function () {
				
               if ($(this).is(":first-child")) {
                  $("p").text("This is list item 1");
               } else if ($(this).is(".middle0,.middle1")) {
                  $("p").text("This is middle class list");
               } else if ($(this).is(":contains('item 5')")) {
                  $("p").text("It's 5th list");
               } 
            });
				
         });
      </script>
		
      <style>
         .selected { color:red; }
      </style>
   </head>
	
   <body>
      <div>
         <span>Click any list item below:</span>
			
         <ul>
            <li class = "top0">list item 1</li>
            <li class = "top1">list item 2</li>
            <li class = "middle0">list item 3</li>
            <li class = "middle1">list item 4</li>
            <li class = "bottom0">list item 5</li>
            <li class = "bottom1">list item 6</li>
         </ul>
			
         <p>FILLER</p>
      </div>
   </body>
</html>

Traversal Filter Method

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(function (index) {
               return index == 1 || $(this).attr("class") == "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>

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