utils 方法汇总

新建js文件 utils.js
let utils = {}
//例子
utils.getstr = function (str) {
  return str+'test';
};

export default utils;

main.js
  import utils from "@/utils"
  Vue.prototype.$utils = utils
使用：
 this.$utils.getstr("字符")

日期格式 yyyy-MM

  //将时间戳转换为日期格式 yyyy-MM
  utils.formatMonth = function (timeStamp) {
    if (timeStamp == null || timeStamp === "") {
      return "";
    }
    let date = new Date(timeStamp);
    let month = date.getMonth() + 1;
    if (month < 10) {
      month = "0" + month;
    }
    return date.getFullYear() + "-" + month;
  };

日期格式 yyyy-MM-dd

utils.formatDate = function (timeStamp) {
  if (!timeStamp) {
    return "";
  }

  let date = new Date(timeStamp);
  let month = date.getMonth() + 1;
  if (month < 10) {
    month = "0" + month;
  }
  let day = date.getDate();
  if (day < 10) {
    day = "0" + day;
  }
  return date.getFullYear() + "-" + month + "-" + day;
};

日期格式 yyyy-MM-dd hh:mm:ss

utils.formatDateTime = function (timeStamp) {
  //shijianchuo是整数，否则要parseInt转换
  if(!timeStamp){
    return ''
  }
  function add0(m) {
    return Number(m) < 10 ? "0" + Number(m) : Number(m);
  }
  var time = new Date(timeStamp);
  var y = time.getFullYear() || '00';
  var m = time.getMonth() + 1 || '00';
  var d = time.getDate() || '00';
  var h = time.getHours() || '00';
  var mm = time.getMinutes() || '00';
  var s = time.getSeconds() || '00';
  return 
    y + "-" + add0(m) + "-" + add0(d) + " " +
    add0(h) + ":" + add0(mm) + ":" + add0(s)
};

值集翻译

//list--值集数据集合
//code--要匹配的值
//listCode--匹配值集数据的哪个字段  默认value
//returnCode--返回值集数据的哪个字段  默认label
utils.codeGetname = function (list,code,listCode='value',returnCode='label') {
  if(!list||!code){
    return ''
  }
  let name = ''
  let value = listCode
  let label = returnCode
  for (let i = 0; i < list.length; i++) {
      if (list[i][value] == code) {
        name = list[i][label]
      }
  }
  return  name
};

获取指定时间的日期 前几日或后几日

utils.getDatebynum =  function(num){
	var now = new Date().getTime();
    var timeStamp = now + 1000 * 60 * 60 * 24 * num;
    function add0(m) {
        return Number(m) < 10 ? "0" + Number(m) : Number(m);
    }
    var time = new Date(timeStamp);
    var y = time.getFullYear();
    var m = time.getMonth() + 1;
    var d = time.getDate();
    var h = time.getHours();
    var mm = time.getMinutes();
    var s = time.getSeconds();
    return (
        y +"-" +add0(m) +"-" +add0(d) +" " +add0(h) +":" +add0(mm) +":" +add0(s)
    );
}