js方法 filter utils 方法记录

//数字格式话方法，场景：

//（1）数字小于99999，每三位用逗号分隔；

//（2）数字大于99999，需要换算以万为单位末尾加“w”，并且四舍五入保留两位小数，如果整数位大于4位数，需要每三位用逗号分隔；
  // 数字大于99999，加w
  numFormatting (num) {
    if (num > 99999) {
      const numFormat = Math.floor(num / 10)
      const rounded = (numFormat / 1000).toFixed(2)
      const integer = rounded.split('.')[0]
      const decimal = rounded.split('.')[1] === '00' ? rounded.split('.')[1] = '' : '.' + rounded.split('.')[1]
      return this.formatNum(integer) + decimal + 'w'
    } else {
      return this.formatNum(num)
      // return (num || 0).toString().replace(/(\d)(?=(?:\d{3})+$)/g, '$1,')
    }
  }

  // 数字格式化，每3位用都逗号分隔
  formatNum (num) {
    let res = ''
    let counter = 0
    let splits = []
    splits = num.toString().split('.')
    num = (splits[0] || 0).toString()
    for (let i = num.length - 1; i >= 0; i--) {
      counter++
      res = num.charAt(i) + res
      if (!(counter % 3) && i !== 0) {
        res = ',' + res
      }
    }
    return splits.length > 1 ? res + '.' + splits[1] : res
  },

// 60秒倒计时
    getCode () {
      if (!this.vCodeTimer) {
        this.vCodeCount = this.countDown
        this.vCodeShow = false
        this.vCodeTimer = setInterval(() => {
          if (this.vCodeCount > 0 && this.vCodeCount <= this.countDown) {
            this.vCodeCount--
          } else {
            this.vCodeShow = true
            clearInterval(this.vCodeTimer)
            this.vCodeTimer = null
          }
        }, 1000)
      }
    },

    // 校验手机号
    isPhoneAvailable (phone) {
      const myreg = /^[1][3,4,5,6,7,8,9][0-9]{9}$/
      if (!myreg.test(phone)) {
        return false
      } else {
        return true
      }
    },



    // 正则 获取url里面的参数，params：key值，url：路径
    getUrlParams (params, url) {

      const reg = new RegExp('(^|&)' + params + '=([^&]*)(&|$)')
      const r = url.substr(1).match(reg)
      if (r == null || r.length < 1) {
        return null
      }
      return r[2]
    },


//多行文本省略号
/* splitContent
 * text 需要处理的文字
 * box 盒子容器
 * maxRow 文字超出多少行显示省略号
 * offset 偏移值
 */
splitContent(text, box, maxRow, offset) {
    var re = /[^\x00-\xff]/g; // 匹配双字节字符
    var style = getComputedStyle(box, null); // 获取盒子的样式
    var w = parseInt(style.width);
    var mSize = parseInt(style.fontSize);

    var count = Math.floor(w / mSize); // 一行可显示多少字
    var hasDouble = text.match(re);
    var len = hasDouble ? (hasDouble.length + text.length) / 2 : text.length / 2;
    var maxSize = count * maxRow; // 最多显示的文字个数
  
    if (len > maxSize) {
        for (var i = maxSize; i < text.length; i++) {
            var mText = text.substr(0, i - 8);
            var has = mText.match(re);
            var mLen = has ? (has.length + mText.length) / 2 : mText.length / 2;
            console.log(text.length,maxSize,mLen,offset)

            if (mLen >= maxSize - offset) {
                text = mText + '...' + '更多';
                break;
            }
        }
    }
    box.innerHTML = text;
}