javascript - How to check if an element is overlapping other elements?

Question

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Answer 1

Something like this for rect1 and rect2 retrieved via getBoundingClientRect():

var overlap = !(rect1.right < rect2.left || 
                rect1.left > rect2.right || 
                rect1.bottom < rect2.top || 
                rect1.top > rect2.bottom)

Explain: if one or more expressions in the parenthese are true, there's no overlapping. If all are false, there must be an overlapping.