I'm writing the JS for a chat application
I'm working on in my free time, and
I need to have HTML identifiers that change according to user submitted data. This is usually something conceptually shaky enough that
I would not even attempt it, but
I don't see myself having much of a choice this time. What
I need to do then is to escape the HTML id to make sure it won't allow for XSS or breaking HTML.
Here's the code:
var user_id = escape(id)
var txt = '<div class="chut">'+
'<div class="log" id="chut_'+user_id+'"></div>'+
'<textarea id="chut_'+user_id+'_msg"></textarea>'+
'<label for="chut_'+user_id+'_to">To:</label>'+
'<input type="text" id="chut_'+user_id+'_to" value='+user_id+' readonly="readonly" />'+
'<input type="submit" id="chut_'+user_id+'_send" value="Message"/>'+
'</div>';
What would be the best way to escape id to avoid any kind of problem mentioned above? As you can see, right now
I'm using the built-in escape() function, but
I'm not sure of how good this is supposed to be compared to other alternatives.
I'm mostly used to sanitizing input before it goes in a text node, not an id itself.
