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src/wxcomponents/vant/mixins/observer/behavior.js 391 Bytes
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  export const behavior = Behavior({
      methods: {
          set(data, callback) {
              return new Promise(resolve => {
                  this.setData(data, () => {
                      if (callback && typeof callback === 'function') {
                          callback.call(this);
                      }
                      resolve();
                  });
              });
          }
      }
  });