如何在元素的原始文本之前添加文本

Question

I'm trying to add some text before of the original text of an element.
Now, I know to insert text after the original content, I can do it using createTextNode like the example below:

 $("#button").click(function() { $( ".text" ).append( document.createTextNode( " Hello" ) ); }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script> <button id="button">Button</button> <div class="text"> Some random text</text> 

But how can I add it before?

Answer 1

.prepend is the function you want.

 $("#button").click(function() { $( ".text" ).prepend( document.createTextNode( " Hello" ) ); }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script> <button id="button">Button</button> <div class="text"> Some random text</text> 

Answer 2

You need to use prepend function. Also , no need of createTextNode.

$("#button").click(function() {
    $( ".text" ).prepend(" Hello");
});

http://jsfiddle.net/8yukxftb/

Answer 3

Can't you also just alter the text there? It doesn't seem from your example that there is anything wrong with

$( ".text" ).text(function(i,txt){ return "Hello " + txt });