how to check if cookies are altered javascript code example
Example 1: javascript check for undefined
if (typeof myVariable === 'undefined'){
//myVariable is undefined
}
Example 2: how to check if 2 images are touching js
function ImagesTouching(x1, y1, img1, x2, y2, img2) {
if (x1 >= x2+img2.width || x1+img1.width <= x2) return false; // too far to the side
if (y1 >= y2+img2.height || y1+img1.height <= y2) return false; // too far above/below
return true; // otherwise, overlap
}