Promise usage

When adding new employees First judge whether the mobile phone number is registered If registered You can't add If not registered You can add

	//  Verify whether the mobile phone number is registered 
    checkOilStaffMobilePhone() {
    
      return new Promise((resolve, reject) => {
    
        checkOilStaffMobilePhone({
    
          mobilePhone: this.ruleForm.mobilePhone
        }).then(res => {
    
          resolve(res)
        })
      })
    },
    //  New employees 
    createOilStaff(formName) {
    
      this.$refs[formName].validate(valid => {
    
        if (valid) {
    
          this.checkOilStaffMobilePhone().then(res => {
    
            if (res) {
    
              createOilStaff(this.ruleForm).then(() => {
    
                this.$message({
     message: ' Saved successfully ', type: 'success' })
                this.newAddStaffDialog = false
                this.getStaffList()
              })
            } else {
    
              this.$message.error(' This mobile number has been registered ')
            }
          })
        }
      })
    },

    C() {
    
      Promise.all([ this.A(), this.B() ]).then(res => {
    
          res Is an array  A and B The return value of 
        }
      })
    },
    A() {
    
      return new Promise((resolve, reject) => {
    
        rechargeOverviewInfo().then(data => {
    
          resolve(data)
        })
      })
    },
    B() {
    
      return new Promise((resolve, reject) => {
    
        getRechargeCardInfoToday().then(data => {
    
          resolve(data)
        })
      })
    }

async

async a(){
    
	await this.b()
}
b() {
    
	return new Promise((resolve, reject) => {
    
		setTimeout(() => {
    
			resolve(' success ')
		}, 1000)
	})
}