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Edit File: wp-polyfill-dom-rect.js

// DOMRect (function (global) { function number(v) { return v === undefined ? 0 : Number(v); } function different(u, v) { return u !== v && !(isNaN(u) && isNaN(v)); } function DOMRect(xArg, yArg, wArg, hArg) { var x, y, width, height, left, right, top, bottom; x = number(xArg); y = number(yArg); width = number(wArg); height = number(hArg); Object.defineProperties(this, { x: { get: function () { return x; }, set: function (newX) { if (different(x, newX)) { x = newX; left = right = undefined; } }, enumerable: true }, y: { get: function () { return y; }, set: function (newY) { if (different(y, newY)) { y = newY; top = bottom = undefined; } }, enumerable: true }, width: { get: function () { return width; }, set: function (newWidth) { if (different(width, newWidth)) { width = newWidth; left = right = undefined; } }, enumerable: true }, height: { get: function () { return height; }, set: function (newHeight) { if (different(height, newHeight)) { height = newHeight; top = bottom = undefined; } }, enumerable: true }, left: { get: function () { if (left === undefined) { left = x + Math.min(0, width); } return left; }, enumerable: true }, right: { get: function () { if (right === undefined) { right = x + Math.max(0, width); } return right; }, enumerable: true }, top: { get: function () { if (top === undefined) { top = y + Math.min(0, height); } return top; }, enumerable: true }, bottom: { get: function () { if (bottom === undefined) { bottom = y + Math.max(0, height); } return bottom; }, enumerable: true } }); } global.DOMRect = DOMRect; }(self));