73 lines
2 KiB
JavaScript
73 lines
2 KiB
JavaScript
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import { upperFirst } from '../../util/helpers';
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export default function (expandedParentClass = '', x = false) {
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const sizeProperty = x ? 'width' : 'height';
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const offsetProperty = `offset${upperFirst(sizeProperty)}`;
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return {
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beforeEnter(el) {
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el._parent = el.parentNode;
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el._initialStyle = {
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transition: el.style.transition,
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visibility: el.style.visibility,
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overflow: el.style.overflow,
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[sizeProperty]: el.style[sizeProperty]
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};
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},
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enter(el) {
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const initialStyle = el._initialStyle;
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const offset = `${el[offsetProperty]}px`;
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el.style.setProperty('transition', 'none', 'important');
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el.style.visibility = 'hidden';
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el.style.visibility = initialStyle.visibility;
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el.style.overflow = 'hidden';
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el.style[sizeProperty] = '0';
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void el.offsetHeight; // force reflow
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el.style.transition = initialStyle.transition;
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if (expandedParentClass && el._parent) {
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el._parent.classList.add(expandedParentClass);
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}
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requestAnimationFrame(() => {
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el.style[sizeProperty] = offset;
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});
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},
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afterEnter: resetStyles,
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enterCancelled: resetStyles,
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leave(el) {
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el._initialStyle = {
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transition: '',
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visibility: '',
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overflow: el.style.overflow,
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[sizeProperty]: el.style[sizeProperty]
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};
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el.style.overflow = 'hidden';
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el.style[sizeProperty] = `${el[offsetProperty]}px`;
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void el.offsetHeight; // force reflow
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requestAnimationFrame(() => el.style[sizeProperty] = '0');
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},
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afterLeave,
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leaveCancelled: afterLeave
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};
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function afterLeave(el) {
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if (expandedParentClass && el._parent) {
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el._parent.classList.remove(expandedParentClass);
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}
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resetStyles(el);
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}
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function resetStyles(el) {
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const size = el._initialStyle[sizeProperty];
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el.style.overflow = el._initialStyle.overflow;
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if (size != null) el.style[sizeProperty] = size;
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delete el._initialStyle;
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}
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}
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//# sourceMappingURL=expand-transition.js.map
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