Write a simple JavaScript program that will recursively walk the DOM for an associated HTML file ...

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Question

Write a simple JavaScript program that will recursively walk the DOM for an associated HTML file ...

write a simple JavaScript program that will recursively walk the DOM for an associated HTML file and print the types of the elements encountered (embedded data need not be printed, we are just interested in the structure), each preceded by an integer reflecting the element’s nesting level within the hierarchical structure of the HTML document. Thus,<HEAD>and <BODY> would be at the second level (‘2’) while <HTML>, would naturally be at the first level (‘1’). You should also print the closing tags for each element found to make the nesting clear. Thus, your output should look something like the following:

1 <HTML>

2<HEAD>

element types in “<HEAD></HEAD>” labelled appropriately

2 </HEAD>

2<BODY>

element types in “<BODY></BODY>” labelled appropriately

2</BODY>

1</HTML>

engineering Computer-Science

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Answer 1

Answer #1

Let's say this following is our html code..

<!doctype html>
       <HTML>
       <HEAD>
       </HEAD>
       <BODY>
           <P> Top 3 Channel 3 Thai actresses: </P>
           <ol>
           <li>U</li>
           <li>V</li>
           <li>B</li>
           </ol> 
         <div id="idDiv"></div>
         <script type="text/javascript" 
          src="script.js"> 
         </script>
      <BODY>
      </HTML>

JavaScript code:

var element = document.getElementById("idDiv");

function printNodeInfo(node) {
  if (node.nodeType == Node.TEXT_NODE && !node.nodeValue.trim()) {
    return;
  }
  element.innerHTML += node;
  element.innerHTML += ", nodeName: " + node.nodeName;
  element.innerHTML += ", nodeType: " + node.nodeType;
  element.innerHTML += ", innerHTML: " + node.innerHTML;
  element.innerHTML += "<br>";
}

// Get a handle of the ordered-list node.
var orderedlistNode = document.getElementsByTagName("ol")[0];
theDOMElementWalker(orderedlistNode);

function theDOMElementWalker(node) {
  if (node.nodeType == 1) {
    node = node.firstChild;

    while (node) {
      theDOMElementWalker(node);
      printNodeInfo(node);
      node = node.nextSibling;
    }
  }
}
element.innerHTML += "<br>";

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Answer 2

Write a simple JavaScript program that will recursively walk the DOM for an associated HTML file ...

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Write a simple JavaScript program that will recursively walk the DOM for an associated HTML file ...

Homework Answers

Add Answer to: Write a simple JavaScript program that will recursively walk the DOM for an associated HTML file ...

Post as a guest

Earn Coins

write an html file and a JavaScript file to show the due date of a book...

Javascript to edit a HTML file. Where to begin? <!doctype html> <html> <head> <meta charset="utf-8"> <title>TODO:...

Using HTML and JavaScript. For this assignment you should submit a single zip file that contains...

Need help with creating this JavaScript file. I'm not sure where or how to begin. 1. You are working solely with the DOM object. Thus, you should be coding primarily in the js file. You must use...

Add Answer to:
Write a simple JavaScript program that will recursively walk the DOM for an associated HTML file ...