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JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops The Refactor Challenge Solution

Max Gerek
Max Gerek
2,718 Points
Posted by Max Gerek
Max Gerek
2,718 Points

Why does the code not work with the document.write written inside the brackets?

Hi,

With the document.write inside the brackets I see: generate random color values > assign to rgbColor > write the color > add one to the var i > re-run

But this produces more than 10 divs.

With the document.write outside the brackets I see it as: generate random color values > assign rgbColor > add one to var i > generate random color value ....and repeat that when it finishes and gets to document.write it would only be writing the last color.

I understand I am seeing this wrong, how does the browser read the program with the document.write on the outside.

1 Answer

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

The concatenating assignment operator ("+=") adds on to what is already there. So when the loop ends, the "html" variable has a string containing all the elements, not just the last one. That's why you only need to use "document.write" one time to display them all.

marcmarcmarc
marcmarcmarc
6,145 Points

Thanks Steven, that helped me understand