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@jtsternberg
Forked from JayWood/colliding.js
Last active October 31, 2022 18:43
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Detect if two elements are colliding/overlapping
/**
* Detects if two elements are colliding
*
* Credit goes to BC on Stack Overflow, cleaned up a little bit
*
* @link http://stackoverflow.com/questions/5419134/how-to-detect-if-two-divs-touch-with-jquery
* @param $div1
* @param $div2
* @returns {boolean}
*/
var is_colliding = function( $div1, $div2 ) {
// Div 1 data
var d1_offset = $div1.offset();
var d1_height = $div1.outerHeight( true );
var d1_width = $div1.outerWidth( true );
var d1_distance_from_top = d1_offset.top + d1_height;
var d1_distance_from_left = d1_offset.left + d1_width;
// Div 2 data
var d2_offset = $div2.offset();
var d2_height = $div2.outerHeight( true );
var d2_width = $div2.outerWidth( true );
var d2_distance_from_top = d2_offset.top + d2_height;
var d2_distance_from_left = d2_offset.left + d2_width;
var not_colliding = ( d1_distance_from_top < d2_offset.top || d1_offset.top > d2_distance_from_top || d1_distance_from_left < d2_offset.left || d1_offset.left > d2_distance_from_left );
// Return whether it IS colliding
return ! not_colliding;
};
@sribna
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sribna commented Feb 19, 2021

Thanks. More cleanup

let isColliding = function (div1, div2) {

    let d1Offset = div1.offset();
    let d1Height = div1.outerHeight(true);
    let d1Width = div1.outerWidth(true);
    let d1Top = d1Offset.top + d1Height;
    let d1Left = d1Offset.left + d1Width;

    let d2Offset = div2.offset();
    let d2Height = div2.outerHeight(true);
    let d2Width = div2.outerWidth(true);
    let d2Top = d2Offset.top + d2Height;
    let d2Left = d2Offset.left + d2Width;

    return !(d1Top < d2Offset.top || d1Offset.top > d2Top || d1Left < d2Offset.left || d1Offset.left > d2Left);
};

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