26 lines
659 B
TypeScript
26 lines
659 B
TypeScript
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import { Directive } from 'vue';
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import { getScrollContainer, getScrollPosition } from '@/scripts/scroll';
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export default {
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mounted(src, binding, vn) {
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const ro = new ResizeObserver((entries, observer) => {
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const pos = getScrollPosition(src);
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const container = getScrollContainer(src);
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const viewHeight = container.clientHeight;
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const height = container.scrollHeight;
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if (pos + viewHeight > height - 32) {
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container.scrollTop = height;
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}
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});
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ro.observe(src);
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// TODO: 新たにプロパティを作るのをやめMapを使う
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src._ro_ = ro;
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},
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unmounted(src, binding, vn) {
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src._ro_.unobserve(src);
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}
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} as Directive;
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