[JavaScript知识库]金额格式化

1.判断正负 + -号 ，不是数字返回 ‘-’

export const toThousandsNoZero = num => {
  return num ? ((isNaN(parseFloat(num.toString().replace(/,/g, ''))) ? 1 : parseFloat(num.toString().replace(/,/g, '')))).toFixed(2).toString().replace(/(\d)(?=(\d{3})+\.)/g, function ($0, $1) {
    return $1 + ','
  }) : '0.00'
}

//没有值返回 0.00
export const ZeroAndNegative= num =>{   
  if(num!=='' &&!isNaN(num)){
    let po=Math.abs(num)
    if(num<0){
      return '- ￥ '+toThousandsNoZero(po)
    }else{
      return '￥ '+toThousandsNoZero(po)
    }
  }else{
    return '￥ 0.00'
  }
}
//没有值返回'-' 0返回也是'-'
export const ZeroAndNegativeB= num =>{   
  if(num!=='' &&!isNaN(num)){
    let po=Math.abs(num)
    if(num<0){
      return '- ￥ '+toThousandsNoZero(po)
    }else if(num>0){
      return '￥ '+toThousandsNoZero(po)
    }else{
      return '-'
    }
  }else{
    return '-'
  }
}

?2. numeral:格式化和操作数字的?JavaScript?库。可以通过format方法添加千分符，也可以增加其他符号。

例：{{amountNumeralFormart(homeBalance.balance,'0,0.00')}}

import numeral from 'numeral'

export const amountNumeralFormart = (amount,formater) => {
  if (!amount) return '0.00';
  let result =  ''
  try{
    let amountNumber = Number(amount)
    result =  numeral(amountNumber).format(formater);
  }catch (e) {
    console.log('金额格式化错误:'+amount +",e:"+e)
  }
  return result;
}