mtsd/sqxp-wx/components/client/client-image-loader.vue

<template>
  <view class="img-wrap" :style="wrapStyle" @click="onClick">
    <image class="img" :src="src" :mode="mode" @load="onLoad" @error="onError" />
    <view v-if="loading && src" class="img-mask">
      <view class="spinner" />
    </view>
  </view>
</template>

<script setup>
import { computed, ref, watch, onBeforeUnmount } from 'vue';

const props = defineProps({
  src: {
    type: String,
    default: ''
  },
  mode: {
    type: String,
    default: 'aspectFill'
  },
  radius: {
    type: String,
    default: '0'
  }
});

const emit = defineEmits(['click', 'load', 'error']);

const loading = ref(true);
let loadingTimer = null;

function clearLoadingTimer() {
  if (loadingTimer) {
    clearTimeout(loadingTimer);
    loadingTimer = null;
  }
}

function startLoadingFallback() {
  clearLoadingTimer();
  // H5 缓存命中场景偶发 load 事件未触发，超时后自动去除遮罩，避免图片“已加载但看不见”
  loadingTimer = setTimeout(() => {
    loading.value = false;
    loadingTimer = null;
  }, 1200);
}

watch(
  () => props.src,
  () => {
    loading.value = !!props.src;
    if (loading.value) {
      startLoadingFallback();
    } else {
      clearLoadingTimer();
    }
  },
  { immediate: true }
);

function onLoad(e) {
  clearLoadingTimer();
  loading.value = false;
  emit('load', e);
}

function onError(e) {
  clearLoadingTimer();
  loading.value = false;
  emit('error', e);
}

onBeforeUnmount(() => {
  clearLoadingTimer();
});

const wrapStyle = computed(() => ({
  borderRadius: props.radius
}));

function onClick(e) {
  emit('click', e);
}
</script>

<style scoped lang="scss">
.img-wrap {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.img {
  display: block;
  width: 100%;
  height: 100%;
}

.img-mask {
  position: absolute;
  inset: 0;
  background: rgba(245, 248, 247, 0.82);
  display: flex;
  align-items: center;
  justify-content: center;
}

.spinner {
  width: 36rpx;
  height: 36rpx;
  border-radius: 50%;
  border: 4rpx solid rgba(10, 159, 109, 0.22);
  border-top-color: #0a9f6d;
  animation: img-spin 0.9s linear infinite;
}

@keyframes img-spin {
  to {
    transform: rotate(360deg);
  }
}
</style>