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JavaScript Object-Oriented JavaScript: Challenge Making the Game Interactive moveLeft() and moveRight() Methods Solution

Tip for using on non-quirks mode page with <!doctype html> set.

The moveRight function is using style.left to position a token with an absolutely positioned parent. This requires units to work when doctype is properly declared and the browser isn't in quirks mode. See adjusted code below.

moveRight(columns) {
        if (this.columnLocation < columns - 1) {
            this.htmlToken.style.left = this.offsetLeft + 76 + "px"; //include units here
            this.columnLocation += 1;