search and replace text inside html of div in javascript but not text inside tag

I’ve some HTML structure and i want to search particular text inside that HTML structure. see below example

<h1>Try to span some text on this page</h1>
    <div>
        span is a <span>paragraph</span>.</div>
    <p class="span ddd">This 123is a paragraph.1</p>

<div class="span ddd">This is some span in a div element.</div>

Now if I’m searching for “span” text then, “span” word should be wrapped with div tag. But only “span” word in text and not from class or other tags.

i want output like this (wrap using div or span)

<h1>Try to <span class="search">span</span> some text on this page</h1> <div> <span class="search">span</span> is a <span>paragraph</span>.</div> <p class="span ddd">This 123is a paragraph.1</p> <div class="span ddd">This is some <span class="search">span</span> in a div element.</div>

Answer

<div id="wrapper"> 
    <h1>Try to span some text on this page</h1>
  <div>
    span is a <span>paragraph</span>.
  </div>
    <p class="span ddd">This 123is a paragraph.1</p>

    <div class="span ddd">This is some span in a div element.</div>
</div>

I have modifed your html by enclosing with a wrapper for getting my selector. But you can use your own selectors.

$(document).ready(function(){
   var str=$('#wrapper').html();
   $('#wrapper').html(str.replace( new RegExp(" span ","g"),"<div>span</div>"));
});

This code will do what you need. Here is the jsffiddle for this.

If your problem is fixed then please don’t forget to mark this as solved. Thanks.