feat: auto add ssrAttribute to htmlAttrs

src/server/generators/attribute.js

@@ -8,9 +8,9 @@ import { isUndefined, isArray } from '../../utils/is-type'
  * @param  {Object} data - the attributes to generate
  * @return {Object} - the attribute generator
  */
-export default function attributeGenerator ({ attribute } = {}, type, data) {
+export default function attributeGenerator ({ attribute, ssrAttribute } = {}, type, data) {
   return {
-    text () {
+    text (addSrrAttribute) {
       let attributeStr = ''
       const watchedAttrs = []
 
@@ -26,7 +26,14 @@ export default function attributeGenerator ({ attribute } = {}, type, data) {
         }
       }
 
-      attributeStr += `${attribute}="${(watchedAttrs.sort()).join(',')}"`
+      if (attributeStr) {
+        attributeStr += `${attribute}="${(watchedAttrs.sort()).join(',')}"`
+      }
+
+      if (type === 'htmlAttrs' && addSrrAttribute) {
+        return `${ssrAttribute}${attributeStr ? ' ' : ''}${attributeStr}`
+      }
+
       return attributeStr
     }
   }

test/unit/generators.test.js

@@ -6,7 +6,7 @@ import { titleGenerator } from '../../src/server/generators'
 const generateServerInjector = (type, data) => _generateServerInjector('test', defaultOptions, type, data)
 
 describe('generators', () => {
-  Object.keys(metaInfoData).forEach((type) => {
+  for (const type in metaInfoData) {
     const typeTests = metaInfoData[type]
 
     const testCases = {
@@ -58,6 +58,19 @@ describe('generators', () => {
         }
       })
     })
+  }
+})
+
+describe('extra tests', () => {
+  test('auto add ssrAttribute', () => {
+    const htmlAttrs = generateServerInjector('htmlAttrs', {})
+    expect(htmlAttrs.text(true)).toBe('data-vue-meta-server-rendered')
+
+    const headAttrs = generateServerInjector('headAttrs', {})
+    expect(headAttrs.text(true)).toBe('')
+
+    const bodyAttrs = generateServerInjector('bodyAttrs', {})
+    expect(bodyAttrs.text(true)).toBe('')
   })
 })