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JavaScript or JQuery display HTML as tree

Posted on 2011-10-23
Medium Priority
Last Modified: 2012-05-12

I'm looking for some JavaScript or JQuery that will display an HTML object's tree, giving the tag names and what html/text the child nodes contain. JavaScript or JQuery doesn't matter to me, so it can start with $("myDiv") or document.getElementById("myDiv").

Basically, if I start with:

  <p>Hello! My Name is <b>Bob!</b>. You can e-mail me at <a href="mailto:bob@bob.com">Bob AT bob DOT com</a> </p>

Then I want to print something like ...

Tag1: p : Hello! My Name is <b>Bob!</b>. You can e-mail me at <a href="mailto:bob@bob.com">Bob AT bob DOT com</a>.
Tag2: b : Bob!
Tag3: a : Bob AT bob DOT com

And, the ultimate goal is only to print elements that have no children, i.e. 2 and 3. But once I get this started I think I can take it there.

Here's what I've started with, and it DOES NOT work. I'm hoping someone can help me.

function splode(theObject) {
  if ($(theObject).children().size() >= 1) {
      console.log("[RecurseLevel] " + i + ": " + $(this).tagName);
      i = i + 1;
  else {
    console.log("[ChildLevel] " + i + ": " + $(theObject).tagName);
    i = i + 1;

    console.log("[TopLevel] " + i + ": " + $(this).html());
    i = i + 1;

Basically, that only gets me output at [TopLevel] - I never see anything at [ChildLevel] or [RecurseLevel].

And tagName doesn't ever work, even at the top level. Don't know why.
Question by:CAS-IT
  • 2
LVL 12

Accepted Solution

zappafan2k2 earned 2000 total points
ID: 37014070
Hmm.  I was just monkeying around and came up with this:
function splode(theObject) {
  $(theObject).find('*').each(function() {

Open in new window

Now, if you have input or select tags, they will all be grabbed.  But you can filter out any unwanted ones:
  $(theObject).find('*').not('options, input, select').each(function() {

Open in new window

You may need to tweak this to your liking, but maybe it will help you along the way.

Assisted Solution

CAS-IT earned 0 total points
ID: 37014358
Yeah, I'm pretty close now. I think I can close this out. Using your code and my new code ...

function splode(theObject) {
  var i = 1;
  $(theObject).find('*').each(function() {
    console.log(i + ": " + dumpElement($(this).get()[0]));
    i = i + 1;

function dumpElement(element) {
    var elementDump;
    var attrDump = '';
    var attribute;
    var dumpedAttribute;
    for(var i=0;i<element.attributes.length;i++){
        attribute = element.attributes[i];
        attrDump+=((attrDump!='')?' ':'')+dumpedAttribute;}
    var tagName=element.tagName.toLowerCase();
    if(element.innerHTML==''){ elementDump='<'+tagName+((attrDump!='')?' '+attrDump:'')+'/>'; } 
    else { elementDump='<'+tagName+((attrDump!='')?' '+attrDump: '')+'>'+element.innerHTML+'</'+tagName+'>'; }
    return elementDump;


Open in new window

I'm nearly there.


Author Closing Comment

ID: 37043477
Accepted my own comment (partially) because zappanfan's code only showed a way to reference an element's children, not print them.

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