shoot-miniprograms/src/components/AppBackground.vue

<script setup>
import { ref } from "vue";
const props = defineProps({
  type: {
    type: Number,
    default: 0,
  },
});
const bgs = ref(["../static/app-bg.png", "../static/app-bg2.png"]);
</script>

<template>
  <view class="background">
    <image class="bg-image" :src="bgs[type]" mode="widthFix" />
    <view class="bg-overlay" v-if="type === 0"></view>
  </view>
</template>

<style scoped>
.background {
  position: fixed;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  z-index: -1;
}

.bg-image {
  width: 100%;
  height: 100%;
}

.bg-overlay {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  background: linear-gradient(
    to bottom,
    rgba(26, 26, 26, 0.2),
    rgba(0, 0, 0, 0.2)
  );
}
</style>