feat: support blurhash

components/common/Blurhash.ts

@@ -0,0 +1,37 @@
+import { decode } from 'blurhash'
+import { getDataUrlFromArr } from '~~/composables/utils'
+
+export default defineComponent({
+  inheritAttrs: false,
+  props: {
+    blurhash: {
+      type: String,
+      required: true,
+    },
+    src: {
+      type: String,
+      required: true,
+    },
+  },
+  setup(props, { attrs }) {
+    const placeholderSrc = ref<string>()
+    const isLoaded = ref(false)
+
+    onMounted(() => {
+      const img = document.createElement('img')
+      img.onload = () => {
+        isLoaded.value = true
+      }
+      img.src = props.src
+
+      if (props.blurhash) {
+        const pixels = decode(props.blurhash, 32, 32)
+        placeholderSrc.value = getDataUrlFromArr(pixels, 32, 32)
+      }
+    })
+
+    return () => isLoaded.value || !placeholderSrc.value
+      ? h('img', { ...attrs, src: props.src })
+      : h('img', { ...attrs, src: placeholderSrc.value })
+  },
+})