The time format 2020-09-29T18:02:02.000Z is converted to "year, month, day, hour, minute and second"

Encountered a demand:

After selecting the time, it will be printed out in the format "2020-09-29T18:02:02.000Z", and the background needs to be converted to the format "2020-09-30 02:02:02".

1. 2020-09-29T18:02:02.000Z

T represents the separator, and Z represents UTC.

UTC: Universal standard time, adding 8 hours to the universal standard time, which is the Eastern Eighth District time, which is Beijing time.

2. 2020-09-29T18:02:02.000Z is converted to 2020-09-30 02:02:02 Steps:

①. Introduce dayjs (a lightweight javascript library for processing time and date)

1. Download npm install dayjs --save
2. 
   Import dayjs from'dayjs' globally introduced in main.js
   Vue.prototype.dayjs = dayjs;

②. Time conversion function

	
	// 时间
    aaa() {
    
    
      let time = '2020-09-29T18:02:02.000Z'
      time = this.formateDate(time);
      console.log(form); // 2020-09-30 2:2:2
    },
    
    // 时间格式转换
    formateDate(time) {
    
    
      // 使用dayjs 把世界标准时间转换为北京时间
      let date = this.dayjs(time).format();
      console.log(date) // 2020-09-30T02:02:02+08:00
      // 把2020-09-30T02:02:02+08:00 截取出 '2020-9-30 2:2:2'
      const arr = date.split("T");
      const d = arr[0];
      const darr = d.split("-");

      const t = arr[1];
      const tarr = t.split(".000");
      const marr = tarr[0].split(":");

      const dd =
        parseInt(darr[0]) +
        "-" +
        parseInt(darr[1]) +
        "-" +
        parseInt(darr[2]) +
        " " +
        parseInt(marr[0]) +
        ":" +
        parseInt(marr[1]) +
        ":" +
        parseInt(marr[2]);
      console.log(dd) // 2020-9-30 2:2:2
      return dd;
    },

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