Vue对数据变更只监听一次

stackblitz

• https://stackblitz.com/edit/vue-only-one-watch?file=src%2Fcomponents%2FHelloWorld.vue

演示

• https://vue-only-one-watch.stackblitz.io

    var unwatch = this.$watch('test', (newValue, oldValue) => {
      // 之后取消观察
      this.testText = `监听到了点击${this.test}次`;
      unwatch();
    });