80 lines
2.4 KiB
JavaScript
80 lines
2.4 KiB
JavaScript
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// Thanks to https://github.com/ElemeFE/element/blob/dev/src/transitions/collapse-transition.js
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import { addClass, removeClass } from '../../utils/assist';
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const Transition = {
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beforeEnter(el) {
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addClass(el, 'collapse-transition');
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if (!el.dataset) el.dataset = {};
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el.dataset.oldPaddingTop = el.style.paddingTop;
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el.dataset.oldPaddingBottom = el.style.paddingBottom;
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el.style.height = '0';
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el.style.paddingTop = 0;
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el.style.paddingBottom = 0;
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},
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enter(el) {
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el.dataset.oldOverflow = el.style.overflow;
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if (el.scrollHeight !== 0) {
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el.style.height = el.scrollHeight + 'px';
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el.style.paddingTop = el.dataset.oldPaddingTop;
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el.style.paddingBottom = el.dataset.oldPaddingBottom;
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} else {
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el.style.height = '';
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el.style.paddingTop = el.dataset.oldPaddingTop;
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el.style.paddingBottom = el.dataset.oldPaddingBottom;
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}
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el.style.overflow = 'hidden';
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},
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afterEnter(el) {
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// for safari: remove class then reset height is necessary
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removeClass(el, 'collapse-transition');
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el.style.height = '';
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el.style.overflow = el.dataset.oldOverflow;
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},
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beforeLeave(el) {
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if (!el.dataset) el.dataset = {};
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el.dataset.oldPaddingTop = el.style.paddingTop;
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el.dataset.oldPaddingBottom = el.style.paddingBottom;
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el.dataset.oldOverflow = el.style.overflow;
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el.style.height = el.scrollHeight + 'px';
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el.style.overflow = 'hidden';
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},
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leave(el) {
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if (el.scrollHeight !== 0) {
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// for safari: add class after set height, or it will jump to zero height suddenly, weired
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addClass(el, 'collapse-transition');
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el.style.height = 0;
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el.style.paddingTop = 0;
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el.style.paddingBottom = 0;
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}
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},
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afterLeave(el) {
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removeClass(el, 'collapse-transition');
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el.style.height = '';
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el.style.overflow = el.dataset.oldOverflow;
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el.style.paddingTop = el.dataset.oldPaddingTop;
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el.style.paddingBottom = el.dataset.oldPaddingBottom;
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}
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};
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export default {
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name: 'CollapseTransition',
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functional: true,
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render(h, { children }) {
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const data = {
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on: Transition
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};
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return h('transition', data, children);
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}
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};
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