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Question

I am in a situation where it seems that I must use document.write in a javascript library. The script must know the width of the area where the script is defined. However, t

Answer 1

This just occurred to me, and I remembered your question: the script code can find the script block it is in, so you can traverse the DOM from there. The current script block will be the last one in the DOM at the moment (the DOM still being parsed when the code runs).

By locating the current script block, you can find its parent element, and add new elements anywhere:

    
        
    
    
        
        

            before script block
            
            after script block
        
        
    
​

http://jsfiddle.net/gFyK9/2/

Note the "blue text" span will be inserted before the "after script block" span. That's because the "after" span does not exist in the DOM at the moment appendChild is called.

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However there's a very simple way to make this fail.