1、获取一年之前的今天
// 获取几年前，默认一年前的今天 getLastYear (yearNum = 1) { let today = new Date() //当天 today.setFullYear(today.getFullYear() - yearNum) return today; },
let yesteryearTime = this.getLastYear();
2、获取今年（当前年）第一天
var tYear = new Date().getFullYear() var startTime = new Date(tYear, 0, 1) //当前年第一天
this.$set(this.formValidate, 'startDate', this.$moment(startTime).format('YYYY-MM-DD'))
