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/* 视图伸缩动画效果组件 */
/* jshint esversion: 6 */
const elTransition =
"0.3s height ease-in-out, 0.3s padding-top ease-in-out, 0.3s padding-bottom ease-in-out";
const Transition = {
"before-enter"(el) {
el.style.transition = elTransition;
if (!el.dataset) el.dataset = {};
el.dataset.oldPaddingTop = el.style.paddingTop;
el.dataset.oldPaddingBottom = el.style.paddingBottom;
el.style.height = 0;
el.style.paddingTop = 0;
el.style.paddingBottom = 0;
},
enter(el) {
el.dataset.oldOverflow = el.style.overflow;
if (el.scrollHeight !== 0) {
el.style.height = el.scrollHeight + "px";
el.style.paddingTop = el.dataset.oldPaddingTop;
el.style.paddingBottom = el.dataset.oldPaddingBottom;
} else {
el.style.height = "";
el.style.paddingTop = el.dataset.oldPaddingTop;
el.style.paddingBottom = el.dataset.oldPaddingBottom;
}
el.style.overflow = "hidden";
},
"after-enter"(el) {
el.style.transition = "";
el.style.height = "";
el.style.overflow = el.dataset.oldOverflow;
},
"before-leave"(el) {
if (!el.dataset) el.dataset = {};
el.dataset.oldPaddingTop = el.style.paddingTop;
el.dataset.oldPaddingBottom = el.style.paddingBottom;
el.dataset.oldOverflow = el.style.overflow;
el.style.height = el.scrollHeight + "px";
el.style.overflow = "hidden";
},
leave(el) {
if (el.scrollHeight !== 0) {
el.style.transition = elTransition;
el.style.height = 0;
el.style.paddingTop = 0;
el.style.paddingBottom = 0;
}
},
"after-leave"(el) {
el.style.transition = "";
el.style.height = "";
el.style.overflow = el.dataset.oldOverflow;
el.style.paddingTop = el.dataset.oldPaddingTop;
el.style.paddingBottom = el.dataset.oldPaddingBottom;
},
};
export default {
name: "collapseTransition",
functional: true,
render(h, { children }) {
const data = {
on: Transition,
};
return h("transition", data, children);
},
};