1.数据格式化，数字超出三位数 逗号 分割： 123，23

    1. /**
    2.  * 格式化数字，超过3个加 逗号 分割
    3.  * @returns 123,456
    4.  */
    5. function intervalNum(data: number | string) {
    6.   if (data === undefined) {
    7.     return
    8.   }
    9.   if (typeof data === 'number') {
    10.     data = data.toFixed(2)
    11.   }
    12.   data = data.replace('.00', '')
    13.   data = data.substring(data.length - 2) === '.0' ? data.replace('.0', '') : data
    14.   // 小于3位数，直接返回
    15.   if (data < '1000') {
    16.     return data
    17.   }
    18.   if (!(data.split('.')[0].length > 3)) {
    19.     return data
    20.   }
    21.   let price = data.split('.')[0]
    22.   const pricePoint = data.split('.')[1]
    23.   let result = ''
    24.   price = price.toString()
    25.   result =
    26.     price.length > 6
    27.       ? `${price.substring(0, price.length - 6)},${price.substring(
    28.         price.length - 6,
    29.         price.length - 3
    30.       )},${price.substring(price.length - 3, price.length)}`
    31.       : `${price.substring(0, price.length - 3)},${price.substring(price.length - 3, price.length)}`
    32.   result = pricePoint ? `${result},${pricePoint}` : result
    33.   return result
    34. }

    2.枚举键值互换

    1. /**
    2.  * convertEnum
    3.  * 枚举键值互换 title:'你好' => '你好':title
    4.  */
    5. export const convertKeyValueEnum = (obj) => {
    6.   const result = {}
    7.   if (typeof obj === 'object') {
    8.     for (const key in obj) {
    9.       if (obj.hasOwnProperty(key)) {
    10.          result[obj[key]] = key
    11.       }
    12.      }
    13.    }
    14.    return result
    15. }