feat: 优化md渲染组件性能表现

components/markdownRender.vue

@@ -4,17 +4,19 @@
     <div class="md-render-wrapper markdown-body">
         <VNodeMD v-if="VNodeMD && props.data"></VNodeMD>
         <div v-else>
-            <el-skeleton :rows="12" />
+            <el-skeleton v-if="!props.disableSkeleton" :rows="12" />
         </div>
     </div>
 </template>
 
 <script setup lang="ts">
+import codemirrorMiddleware from '~/hooks/h2v/codemirrorMiddleware';
 import useMarkdownit from '~/hooks/useMarkdownit';
 import Html2VNode from '~/utils/html2VNode';
 
 const props = defineProps<{
     data: string
+    disableSkeleton?: boolean
 }>()
 
 const VNodeMD = shallowRef<any>()
@@ -26,31 +28,7 @@ watch(() => props.data, async () => {
     const markdownIt = await useMarkdownit()
     const renderedData = markdownIt.render(props.data)
     const h2v = new Html2VNode()
-    h2v.use(
+    h2v.use(codemirrorMiddleware)
-        {
-            filter(tagName) {
-                return tagName === 'code'
-            },
-            async render({
-                item,
-                tagAttrs,
-            }) {
-                const codeMirror = (await import('./codeMirror.vue')).default
-                const codeType = tagAttrs?.class?.slice(1, -1)?.split('-')?.[1] ?? ''
-                // @ts-ignore
-                const inline = (item.children[0].children.trim() as string).includes('\n') ? false : true
-                return h(
-                    codeMirror,
-                    {
-                        // @ts-ignore
-                        data: item.children[0].children.trim(),
-                        type: codeType,
-                        inline,
-                    },
-                )
-            },
-        }
-    )
     const res = await h2v.render(renderedData)
     VNodeMD.value = {
         setup: () => {
@@ -61,10 +39,6 @@ watch(() => props.data, async () => {
     immediate: true
 })
 
-// watch(() => renderedData.value, () => {
-//     _key.value = Math.random()
-// })
-
 </script>
 
 <style lang="scss">

components/user/postEditor.vue

@@ -39,7 +39,7 @@
                 <el-input v-if="isEditing" type="textarea" v-model:model-value="content" placeholder="content"
                     :autosize="{ minRows: 15 }" :disabled="disabled" />
                 <div class=" border-1 border-gray-300 rounded-sm p-2" v-else>
-                    <markdown-render :data="content ?? ''" />
+                    <markdown-render :data="content ?? ''" :disable-skeleton="true" />
                 </div>
             </el-col>
         </el-row>

hooks/h2v/codemirrorMiddleware.ts

@@ -0,0 +1,28 @@
+const codemirrorMiddleware: middlewareType = {
+    filter(tagName: string) {
+        return tagName === 'code'
+    },
+    async render({
+        item,
+        tagAttrs,
+    }) {
+        const codeMirror = await cachedPromise('component:codeMirror', async () => {
+            const codeMirror = (await import('~/components/codeMirror.vue')).default
+            return codeMirror
+        })
+        const codeType = tagAttrs?.class?.slice(1, -1)?.split('-')?.[1] ?? ''
+        // @ts-ignore
+        const inline = (item.children[0].children.trim() as string).includes('\n') ? false : true
+        return h(
+            codeMirror,
+            {
+                // @ts-ignore
+                data: item.children[0].children.trim(),
+                type: codeType,
+                inline,
+            },
+        )
+    },
+}
+
+export default codemirrorMiddleware

utils/cachedPromise.ts

@@ -0,0 +1,11 @@
+import useDefaultStore from "~/hooks/pinia/useDefaultStore"
+
+export default async function cachedPromise<T>(key: string, promise: () =>Promise<T>): Promise<T> {
+    const cache = useDefaultStore().getCache(key)
+    if (cache) {
+        return cache
+    }
+    const res = await promise()
+    useDefaultStore().setCache(key, res)
+    return res
+}