92 lines
1.9 KiB
Vue
92 lines
1.9 KiB
Vue
<template>
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<div class="video-scroll" ref="root">
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<img v-for="(file, idx) in definition.files"
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:data-src="file"
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:style="{
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top: `${Math.round(definition.top)}px`,
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left: `${Math.round(definition.left) + width * idx}px`,
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}"
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/>
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</div>
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</template>
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<script lang="ts">
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import {defineComponent, onMounted, ref} from "vue";
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export default defineComponent({
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name: "VideoScroll",
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props: {
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definition: {
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type: Object,
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required: true
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}
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},
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setup(props) {
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const width = ref(0);
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const height = ref(0);
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const root = ref<Element | null>(null);
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const definition = props.definition as VideoScrollDef;
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getMeta(definition.files[0]).then((img) => {
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width.value = img.width;
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height.value = img.height;
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});
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onMounted(() => {
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const observer = new IntersectionObserver((entries, observer) => {
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entries.forEach((entry) => {
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if (entry.isIntersecting){
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const element = entry.target as HTMLImageElement;
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element.src = element.dataset.src!;
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}
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})
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}, {rootMargin: "100px"});
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Array.from((root.value as Element).children).forEach((el) => {
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observer.observe(el);
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});
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});
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return {
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root,
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width,
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height
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};
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}
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});
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export enum VideoScrollDirection {
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RIGHT
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}
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export interface VideoScrollDef {
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top: number,
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left: number,
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direction: VideoScrollDirection,
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files: string[],
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style?: { [key: string]: string }
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}
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function getMeta(url: string): Promise<HTMLImageElement> {
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return new Promise((resolve, reject) => {
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let img = new Image();
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img.onload = () => resolve(img);
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img.onerror = () => reject();
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img.src = url;
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});
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}
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</script>
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<!-- Add "scoped" attribute to limit CSS to this component only -->
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<style scoped>
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.video-scroll img {
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position: absolute;
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}
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.initial {
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background: red;
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}
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</style>
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