Question

I’m wondering if there’s a way to count the words inside a div for example. Say we have a div like so:

<div id='content'> hello how are you? </div> 

Then have the JS function return an integer of 4.

Is this possible? I have done this with form elements but can’t seem to do it for non-form ones.

Any ideas?

g

Answer 1

If you know that the DIV is only going to have text in it, you can KISS:

var count = document.getElementById('content').innerHTML.split(' ').length; 

If the div can have HTML tags in it, you’re going to have to traverse its children looking for text nodes:

function get_text(el) {     ret = '';     var length = el.childNodes.length;     for(var i = 0; i < length; i++) {         var node = el.childNodes[i];         if(node.nodeType != 8) {             ret += node.nodeType != 1 ? node.nodeValue : get_text(node);         }     }     return ret; } var words = get_text(document.getElementById('content')); var count = words.split(' ').length; 

This is the same logic that the jQuery library uses to achieve the effect of its text() function. jQuery is a pretty awesome library that in this case is not necessary. However, if you find yourself doing a lot of DOM manipulation or AJAX then you might want to check it out.

EDIT:

As noted by Gumbo in the comments, the way we are splitting the strings above would count two consecutive spaces as a word. If you expect that sort of thing (and even if you don’t) it’s probably best to avoid it by splitting on a regular expression instead of on a simple space character. Keeping that in mind, instead of doing the above split, you should do something like this:

var count = words.split(/\s+/).length; 

The only difference being on what we’re passing to the split function.