Original Project

Optimizing website:

after optimiziation the pagespeed insight's score is over 90. website after optimization in page speed insight

I did this by changing:

• inline style within html doc.
• resricted print.css to the printing screen only using media attribute. check the result out.

demo

Pizza.html:

Time to resize pizzas is less than 5 ms thanks to:

• reducing the number of pizzas loaded to the (from 200 to 25) .
• replaced querySelector with getElementById or getElementByClassName it's significantly faster
• moved unnecessary code lines out of the loop in updatePosition().

Demo