18 lines
616 B
JavaScript
18 lines
616 B
JavaScript
const isPrimaryPointer = (event) => {
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if (event.pointerType === "mouse") {
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return typeof event.button !== "number" || event.button <= 0;
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}
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else {
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/**
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* isPrimary is true for all mice buttons, whereas every touch point
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* is regarded as its own input. So subsequent concurrent touch points
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* will be false.
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*
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* Specifically match against false here as incomplete versions of
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* PointerEvents in very old browser might have it set as undefined.
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*/
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return event.isPrimary !== false;
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}
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};
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export { isPrimaryPointer };
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