wip(ssr): vdom serialization

packages/runtime-dom/src/modules/attrs.ts

@@ -1,7 +1,18 @@
-export function patchAttr(el: Element, key: string, value: any) {
-  if (value == null) {
+// TODO explain why we are no longer checking boolean/enumerated here
+
+export function patchAttr(
+  el: Element,
+  key: string,
+  value: any,
+  isSVG: boolean
+) {
+  if (isSVG && key.indexOf('xlink:') === 0) {
+    // TODO handle xlink
+  } else if (value == null) {
     el.removeAttribute(key)
   } else {
+    // TODO in dev mode, warn against incorrect values for boolean or
+    // enumerated attributes
     el.setAttribute(key, value)
   }
 }

packages/runtime-dom/src/patchProp.ts

@@ -62,7 +62,7 @@ export function patchProp(
         } else if (key === 'false-value') {
           ;(el as any)._falseValue = nextValue
         }
-        patchAttr(el, key, nextValue)
+        patchAttr(el, key, nextValue, isSVG)
       }
       break
   }