20 lines
468 B
TypeScript
20 lines
468 B
TypeScript
// Firefox has no implementation of toElement.
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if (!("toElement" in MouseEvent.prototype)) {
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Object.defineProperty(MouseEvent.prototype, "toElement", {
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get: function (): EventTarget | null {
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// @ts-ignore
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const event = this as MouseEvent;
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switch (event.type) {
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case "mouseup":
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case "focusin":
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case "mousenter":
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case "mouseover":
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case "dragenter":
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return event.target;
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default:
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return event.relatedTarget;
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}
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},
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});
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}
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