22 lines
430 B
TypeScript
22 lines
430 B
TypeScript
import { Directive } from 'vue';
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export default {
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mounted(src, binding, vn) {
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const fn = binding.value;
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if (fn == null) return;
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const observer = new IntersectionObserver(entries => {
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if (entries.some(entry => entry.isIntersecting)) {
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fn();
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}
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});
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observer.observe(src);
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src._observer_ = observer;
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},
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unmounted(src, binding, vn) {
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if (src._observer_) src._observer_.disconnect();
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},
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} as Directive;
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