Vue的filters(本地)或filter(全局)过滤常用数据类型解析

// 【全局过滤】----------------------------------------
 
//转换情况一的日期
Vue.filter('yyyy_MM_dd', v => {
    if (v) return new Date(v)
        .toLocaleString("zh-Hans-CN", {
            year: "numeric",
            month: "2-digit",
            day: "2-digit",
        }).replace(/\//g, "-");
    else return '';
});
 
//转换情况二的百分数
Vue.filter('percent', v => {
    if (v) return  Math.abs(v.toFixed(2)) + "%";
    else return 0;
});

  filters: {
    //转换情况一的日期
    yyyy_MM_dd: (v) => {
      if (v)
        return new Date(v)
          .toLocaleString("zh-Hans-CN", {
            year: "numeric",
            month: "2-digit",
            day: "2-digit",
          })
          .replace(/\//g, "-");
      else return "";
    },
 
    //转换情况二的百分数
    percent: (v) => {
      if (v) return Math.abs(v.toFixed(2)) + "%";
      else return 0;
    },
  },

{{ 日期 | yyyy_MM_dd }}
{{ 小数 | percent }}
 
 

Vue.filter('NumberFORMat', function(value) {
  if (!value) {
    return '0'
  }
  const intPartFormat = value.toString().replace(/(\d)(?=(?:\d{3})+$)/g, '$1,') // 将整数部分逢三一断
  return intPartFormat
})

Vue.filter('MoneyFormat', function(number, decimals, symbol) {
    if (!decimals) {
      decimals = 2
    }
    if (!symbol) {
      symbol = ''
    }
    const decPoint = '.'
    const thousandsSep = ','
    number = (number + '').replace(/[^0-9+-Ee.]/g, '')
    const n = !isFinite(+number) ? 0 : +number
    const prec = !isFinite(+decimals) ? 0 : Math.abs(decimals)
    const sep = (typeof thousandsSep === 'undefined') ? ',' : thousandsSep
    const dec = (typeof decPoint === 'undefined') ? '.' : decPoint
    let s = ''
    const toFixedFix = function(n, prec) {
      const k = Math.pow(10, prec)
      return '' + numMulti (n, k) / k
    }
    s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.')
    const re = /(-?\d+)(\d{3})/
    while (re.test(s[0])) {
      s[0] = s[0].replace(re, '$1' + sep + '$2')
    }
    if ((s[1] || '').length < prec) {
      s[1] = s[1] || ''
      s[1] += new Array(prec - s[1].length + 1).join('0')
    }
  
    return symbol + s.join(dec)
  })

export function numMulti (num1, num2) {
  num1 = num1 || 0
  num2 = num2 || 0
   let baseNum = 0
   try {
       baseNum += num1.toString().split('.')[1].length
   } catch (e) {
   }
   try {
       baseNum += num2.toString().split('.')[1].length
   } catch (e) {
   }
   return Number(num1.toString().replace('.', '')) * Number(num2.toString().replace('.', '')) / Math.pow(10, baseNum)
}

const formatMoney = (money) => {
  return money.replace(new RegExp(`(?!^)(?=(\\d{3})+${money.includes('.') ? '\\.' : '$'})`, 'g'), ',')  
}
formatMoney('123456789') // '123,456,789'
formatMoney('123456789.123') // '123,456,789.123'
formatMoney('123') // '123'

  filters: {
    itemDescFilter: function (value) {
      if (!value) {
        return ''
      }
      value = value.toString()
      if (value.length <= 10) {
        return value
      } else {
        return value.substr(0, 10) + ' . . .'
      }
    }
  },

Vue.filter('dayjs', function(dataStr, pattern = 'YYYY-MM-DD') {
  return moment(dataStr).format(pattern)
})

Vue.filter('moment', function(dataStr, pattern = 'YYYY-MM-DD HH:mm:ss') {
  return moment(dataStr).format(pattern)
})
具体使用同第4点