86 lines
1.7 KiB
Vue
86 lines
1.7 KiB
Vue
<template>
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<transition-group
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name="staggered-fade"
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tag="div"
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:css="false"
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@before-enter="beforeEnter"
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@enter="enter"
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@leave="leave"
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mode="out-in"
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appear
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>
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<slot></slot>
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</transition-group>
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</template>
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<script lang="ts">
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import Vue from 'vue';
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export default Vue.extend({
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props: {
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delay: {
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type: Number,
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required: false,
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default: 40
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},
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direction: {
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type: String,
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required: false,
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default: 'down'
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},
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reversed: {
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type: Boolean,
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required: false,
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default: false
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}
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},
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data() {
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return {
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currentChildren: [] as Node[],
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index: 0
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};
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},
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methods: {
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updateChildren() {
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this.currentChildren = this.$slots.default!.filter(n => n.elm != null).map(n => n.elm!);
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},
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beforeEnter(el) {
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el.style.opacity = 0;
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el.style.transform = this.direction === 'down' ? 'translateY(-64px)' : 'translateY(64px)';
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},
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enter(el, done) {
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let index = this.index;
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// TODO
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//if (this.reversed) index = ...;
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//console.log(index);
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el.style.transition = [getComputedStyle(el).transition, 'transform 0.7s cubic-bezier(0.23, 1, 0.32, 1)', 'opacity 0.7s cubic-bezier(0.23, 1, 0.32, 1)'].filter(x => x != '').join(',');
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setTimeout(() => {
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el.style.opacity = 1;
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el.style.transform = 'translateY(0px)';
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setTimeout(() => {
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done();
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this.index--;
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}, 700);
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}, this.delay * index)
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this.index++;
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},
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leave(el, done) {
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setTimeout(() => {
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el.style.opacity = 0;
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el.style.transform = this.direction === 'down' ? 'translateY(64px)' : 'translateY(-64px)';
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setTimeout(done, 700);
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}, this.delay * el.dataset.index)
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},
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focus() {
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this.$slots.default[0].elm.focus();
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}
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}
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});
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</script>
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<style lang="scss">
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.staggered-fade-move {
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transition: transform 0.7s !important;
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}
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</style>
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