Tryit Editor v1.8

Source Code:
<!DOCTYPE html> <html> <head> <script src="../../ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $("button").click(function(){ $("div").contents().filter("em").wrap("<b/>"); }); }); </script> </head> <body> <div><em>Hello world! What a beautiful day!</em></div> <p>In this example, by clicking on the button, we search for all the text nodes inside the div element and wrap them with a b element.</p> <button>Find all text nodes in div and wrap them</button><br> </body> </html>
Result:
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