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yyx990803 · yyx990803 · commit dc00590bc56f · 2017-05-09T23:22:55.000+08:00
diff --git a/src/core/vdom/helpers/normalize-children.js b/src/core/vdom/helpers/normalize-children.js
@@ -52,13 +52,17 @@ function normalizeArrayChildren (children: any, nestedIndex?: string): Array<VNo
       res.push.apply(res, normalizeArrayChildren(c, `${nestedIndex || ''}_${i}`))
     } else if (isPrimitive(c)) {
       if (isTextNode(last)) {
+        // merge adjacent text nodes
+        // this is necessary for SSR hydration because text nodes are
+        // essentially merged when rendered to HTML strings
         (last: any).text += String(c)
       } else if (c !== '') {
         // convert primitive to vnode
         res.push(createTextVNode(c))
       }
     } else {
       if (isTextNode(c) && isTextNode(last)) {
+        // merge adjacent text nodes
         res[res.length - 1] = createTextVNode(last.text + c.text)
       } else {
         // default key for nested array children (likely generated by v-for)
