forked from daren.hsu/line_push
48 lines
1.2 KiB
JavaScript
48 lines
1.2 KiB
JavaScript
function inserted(el, binding) {
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const modifiers = binding.modifiers || {};
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const value = binding.value;
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const {
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handler,
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options
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} = typeof value === 'object' ? value : {
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handler: value,
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options: {}
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};
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const observer = new IntersectionObserver((entries = [], observer) => {
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/* istanbul ignore if */
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if (!el._observe) return; // Just in case, should never fire
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// If is not quiet or has already been
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// initted, invoke the user callback
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if (handler && (!modifiers.quiet || el._observe.init)) {
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const isIntersecting = Boolean(entries.find(entry => entry.isIntersecting));
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handler(entries, observer, isIntersecting);
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} // If has already been initted and
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// has the once modifier, unbind
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if (el._observe.init && modifiers.once) unbind(el); // Otherwise, mark the observer as initted
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else el._observe.init = true;
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}, options);
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el._observe = {
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init: false,
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observer
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};
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observer.observe(el);
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}
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function unbind(el) {
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/* istanbul ignore if */
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if (!el._observe) return;
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el._observe.observer.unobserve(el);
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delete el._observe;
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}
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export const Intersect = {
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inserted,
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unbind
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};
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export default Intersect;
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//# sourceMappingURL=index.js.map
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