71 lines
2.6 KiB
JavaScript
71 lines
2.6 KiB
JavaScript
import { isDragActive } from './drag/state/is-active.mjs';
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import { setupGesture } from './utils/setup.mjs';
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function isValidHover(event) {
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return !(event.pointerType === "touch" || isDragActive());
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}
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/**
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* Create a hover gesture. hover() is different to .addEventListener("pointerenter")
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* in that it has an easier syntax, filters out polyfilled touch events, interoperates
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* with drag gestures, and automatically removes the "pointerennd" event listener when the hover ends.
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*
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* @public
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*/
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function hover(elementOrSelector, onHoverStart, options = {}) {
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const [elements, eventOptions, cancel] = setupGesture(elementOrSelector, options);
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elements.forEach((element) => {
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let isPressed = false;
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let deferredHoverEnd = false;
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let hoverEndCallback;
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const removePointerLeave = () => {
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element.removeEventListener("pointerleave", onPointerLeave);
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};
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const endHover = (event) => {
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if (hoverEndCallback) {
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hoverEndCallback(event);
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hoverEndCallback = undefined;
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}
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removePointerLeave();
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};
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const onPointerUp = (event) => {
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isPressed = false;
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window.removeEventListener("pointerup", onPointerUp);
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window.removeEventListener("pointercancel", onPointerUp);
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if (deferredHoverEnd) {
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deferredHoverEnd = false;
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endHover(event);
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}
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};
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const onPointerDown = () => {
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isPressed = true;
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window.addEventListener("pointerup", onPointerUp, eventOptions);
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window.addEventListener("pointercancel", onPointerUp, eventOptions);
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};
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const onPointerLeave = (leaveEvent) => {
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if (leaveEvent.pointerType === "touch")
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return;
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if (isPressed) {
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deferredHoverEnd = true;
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return;
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}
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endHover(leaveEvent);
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};
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const onPointerEnter = (enterEvent) => {
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if (!isValidHover(enterEvent))
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return;
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deferredHoverEnd = false;
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const onHoverEnd = onHoverStart(element, enterEvent);
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if (typeof onHoverEnd !== "function")
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return;
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hoverEndCallback = onHoverEnd;
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element.addEventListener("pointerleave", onPointerLeave, eventOptions);
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};
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element.addEventListener("pointerenter", onPointerEnter, eventOptions);
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element.addEventListener("pointerdown", onPointerDown, eventOptions);
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});
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return cancel;
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}
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export { hover };
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//# sourceMappingURL=hover.mjs.map
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