[bugfix] Tab: 修复极端情况激活态异常

packages/common/utils.ts

@@ -1,23 +1,22 @@
-function isDef(value: any): boolean {
+export function isDef(value: any): boolean {
   return value !== undefined && value !== null;
 }
 
-function isObj(x: any): boolean {
+export function isObj(x: any): boolean {
   const type = typeof x;
   return x !== null && (type === 'object' || type === 'function');
 }
 
-function isNumber(value) {
+export function isNumber(value) {
   return /^\d+$/.test(value);
 }
 
-function range(num: number, min: number, max: number) {
+export function range(num: number, min: number, max: number) {
   return Math.min(Math.max(num, min), max);
 }
 
-export {
+export function nextTick(fn: Function) {
-  isObj,
+  setTimeout(() => {
-  isDef,
+    fn();
-  isNumber,
+  }, 1000 / 30);
-  range
+}
-};

packages/tabs/index.ts

@@ -1,6 +1,7 @@
 import { VantComponent } from '../common/component';
 import { touch } from '../mixins/touch';
 import { Weapp } from 'definitions/weapp';
+import { nextTick } from '../common/utils';
 
 type TabItemData = {
   width?: number
@@ -236,7 +237,7 @@ VantComponent({
         }
       });
 
-      this.set({}, () => {
+      nextTick(() => {
         this.setLine();
         this.setTrack();
         this.scrollIntoView();