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JavaScript

Leo Effert
Leo Effert
3,704 Points
Posted by Leo Effert
Leo Effert
3,704 Points

adding events to items in array with a loop. Why don't it work?

var co = document.querySelector("div");
var buttons = [];
var buttonNumber = 0;

for (i = 0; i < 9; i++) {
    button = document.createElement("button");
    buttons.push(button);
    co.appendChild(button);
    }

for (i = 0; i < buttons.length; i++) {
    buttons[i].addEventListener("click", changeColor);
    buttonNumber += 1;
  }


function changeColor(i) {
  buttons[buttonNumber].style.backgroundColor = "red";
}

Moderator edited: Markdown added so that code renders properly in the forums.

2 Answers

Leo Effert
Leo Effert
3,704 Points
Leo Effert
Leo Effert
3,704 Points

I solved it by putting let i = ii in each loop

Robert Anthony
Robert Anthony
19,952 Points
Robert Anthony
Robert Anthony
19,952 Points

The JavaScript is set to 'strict' and you need to put 'let' in each for loop:

for(let i = 0 ; i < 9 ; i++)
Leo Effert
Leo Effert
3,704 Points
Leo Effert
Leo Effert
3,704 Points

Just write "let " in the beginning of every condition? Tried that but it didn't work.