What is wrong with this code?

Question

https://code.sololearn.com/WKH5jGAUXOY9/?ref=app

Answer 1

getElementsByClassName() returns an array of all elements with the passed class name. In order to apply style to those elements, you have to access them individually.

const blocks = document.getElementsByClassName("block");
for (let i = 0; i < blocks.length; i++) {
blocks[i].style = ...
}

Answer 2

thanks, Russ!