fix(runtime-core): pass prev value to hostPatchProp (#809)

hareku · web-flow · commit cd3460386414 · 2020-03-09T16:08:10.000-04:00
fix #808
diff --git a/packages/runtime-core/src/renderer.ts b/packages/runtime-core/src/renderer.ts
@@ -831,7 +831,7 @@ function baseCreateRenderer<
               el,
               key,
               null,
-              null,
+              oldProps[key],
               isSVG,
               vnode.children as HostVNode[],
               parentComponent,
