fix(v3): properties

packages/uni-mp-weixin/dist/mp.js

@@ -508,9 +508,9 @@ function initProperties (vm, instanceData) {
         /* eslint-disable no-self-compare */
         if (newVal === value || (newVal !== newVal && value !== value)) {
           return
-        }
+        }
+        value = newVal;
         if (observer) {
-          value = newVal;
           observe(observer, vm, newVal, oldVal);
         }
         // 触发渲染

src/core/runtime/mp/polyfill/state/properties.js

@@ -84,9 +84,9 @@ export function initProperties (vm, instanceData) {
         /* eslint-disable no-self-compare */
         if (newVal === value || (newVal !== newVal && value !== value)) {
           return
-        }
+        }
+        value = newVal
         if (observer) {
-          value = newVal
           observe(observer, vm, newVal, oldVal)
         }
         // 触发渲染