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7,555 PointsTip 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) {
console.log(this.offsetLeft);
this.htmlToken.style.left = this.offsetLeft + 76 + "px"; //include units here
this.columnLocation += 1;
}
}