Component({
  doSth() {
    this.setData({ number: 1 }) // Executed directly within the current synchronous process

    wx.nextTick(() => {
      this.setData({ number: 3 }) // Executed after the current synchronous process ends, in the next time slice.
    })

    this.setData({ number: 2 }) // Executed directly within the current synchronous process
  }
})