DOM setAttribute() isn't working, How do I fix this?

Question

Im using Java to code 100 vertical bars in each order, based on their size
Example:
|||||
||||
||| ...
||
|

But I used it in Java to make it work, but as a result, it shows nothing

Code: https://code.sololearn.com/WoDK8d4W3jcD/?ref=app
What do I do?

Answer 1

// My code
https://code.sololearn.com/WgTDZa4uqVOl/#html

// My comment
First, you forgot to close the "Rect" tag as you were creating one inside the other...
The tag because it has a different form of rederization, the modification of your attributes gets a little more complicated with use JavaScript.