金额格式化 - davy-gan/web GitHub Wiki

function digitUppercase(n) {
  if (!n) {
    return '零元整';
  }
  const fraction = ['角', '分'];
  const digit = ['零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖'];
  const unit = [
    ['元', '万', '亿'],
    ['', '拾', '佰', '仟'],
  ];
  let num = Math.abs(n);
  let s = '';
  fraction.forEach((item, index) => {
    s += (digit[Math.floor(num * 10 * (10 ** index)) % 10] + item).replace(/零./, '');
  });
  s = s || '整';
  num = Math.floor(num);
  for (let i = 0; i < unit[0].length && num > 0; i += 1) {
    let p = '';
    for (let j = 0; j < unit[1].length && num > 0; j += 1) {
      p = digit[num % 10] + unit[1][j] + p;
      num = Math.floor(num / 10);
    }
    s = p.replace(/(零.)*零$/, '').replace(/^$/, '零') + unit[0][i] + s;
  }

  return s.replace(/(零.)*零元/, '元').replace(/(零.)+/g, '零').replace(/^整$/, '零元整');
}
 function formatMoney(num, unit = '元') {
  if (num === undefined) {
    return `0.00${unit}`;
  }
  if (num === '') {
    return;
  } else if (isNaN(num)) {
    return num;
  }
  return `${parseFloat(num).toFixed(2).replace(/(\d)(?=(\d{3})+\.)/g, '$1,')}${unit}`;
}

function formatDigitMoney(n) { // 目前只能处理万亿以下的数据
  if (!n) {
    return '0元';
  }
  if (n >= 1000000000000) {
    return formatMoney(n);
  }
  const fraction = ['角', '分'];
  const digit = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
  const unit = [
    ['元', '万', '亿'],
    ['', '', '', ''],
  ];
  let num = Math.abs(n);
  let s = '';
  fraction.forEach((item, index) => {
    s += (digit[Math.floor(num * 10 * (10 ** index)) % 10] + item).replace(/0./, '');
  });
  s = s || '';
  num = Math.floor(num);
  for (let i = 0; i < unit[0].length && num > 0; i += 1) {
    let p = '';
    for (let j = 0; j < unit[1].length && num > 0; j += 1) {
      p = digit[num % 10] + unit[1][j] + p;
      num = Math.floor(num / 10);
    }
    p = `${Math.floor(p)}`;
    s = p + unit[0][i] + s;
  }

  return s.replace(/0000万/, '').replace(/0000/, '').replace(/万0元/, '万元').replace(/亿0万/, '亿')
    .replace(/^$/, '0元');
}

function format(value,symbol){  //两个参数，一个是值，一个是货币类型（￥,$）
		var obj = {
			symbol:symbol||"",    //货币类型
			int:undefined,    //整数位
			dec:undefined,  //小数位
			targ:"",          //正负
			times:['','万','亿','万亿','亿亿']
		}
		value = String(value);
		var reg = /^-?\d+\.?\d+$/;
		if(!reg.test(value)){
			alert("请输入数字");
			return false;
		}
		
		if(value[0]=="-"){
			obj.targ = "-";
			value = value.substring(1,value.length)
		}
		
		var times = 0;
		value = Number(value);
		while(value >= 10000){
			value = value/10000;
			times++;
		}
 
		value = value.toFixed(2)
 
		var arr = String(value).split(".")
		obj.dec = arr[1];
		obj.int = arr[0];
		if(obj.int.length>3){
			obj.int = obj.int.replace(/(.{1})/,'$1,')
		}
 
		return obj.symbol+obj.targ+obj.int+"."+obj.dec+obj.times[times];

}
export function formatMoney(value, symbol) {
  // 两个参数，一个是值，一个是货币类型（￥,$）
  const obj = {
    symbol: symbol || '', // 货币类型
    int: undefined, // 整数位
    dec: undefined, // 小数位
    targ: '', // 正负
    times: ['', '万', '亿', '万亿', '亿亿']
  };
  value = String(value);
  const reg = /^-?\d+\.?\d+$/;
  if (!reg.test(value)) {
    return 0;
  }
  if (value[0] === '-') {
    obj.targ = '-';
    value = value.substring(1, value.length);
  }
  let times = 0;
  value = Number(value);
  while (value >= 10000) {
    value /= 10000;
    times++;
  }
  value = value.toFixed(2);
  const arr = String(value).split('.');
  obj.dec = arr[1];
  obj.int = arr[0];
  return `${obj.symbol + obj.targ + obj.int}.${obj.dec}<span class="alb-money-unit">${obj.times[times]}</span>`;
}