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有些情况我们需要在各种刁钻的情况下都要保持图片比例不变,比如用户缩放窗口等改变布局的情况。实现原理就是通过容器的宽度和内边距在保持你想要的比例。
以下是基础功能的组件示例:
HTML
<template>
<div style="position: relative" :style="ratioStr">
<div style="position: absolute; inset: 0px; user-select: none">
<img
v-if="type === 'image'"
:src="src"
:alt="alt || src"
style="object-fit: cover; width: 100%; height: 100%" />
<video
v-else
:src="src"
controls
style="object-fit: contain; width: 100%; height: 100%" />
</div>
</div>
</template>
<script lang="ts" setup>
const props = defineProps({
ratio: {
type: Array as unknown as () => [number, number],
default: () => [1, 1],
},
alt: {
type: String,
default: "",
},
type: {
type: String as () => "image" | "video",
default: "image",
},
src: {
type: String,
default: "",
},
});
const ratioStr = computed(() => {
const [width, paddingBottom] = props.ratio;
return `width: 100%;padding-bottom: ${(paddingBottom / width) * 100}%;`;
});
</script>
<style lang="scss" scoped></style>
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