@daysnap/utils/es/chunk-4BFL6RXS.js

通用的工具库

// src/round.ts
function round(val, fractionDigits) {
  const number = val;
  if (number >= 10 ** 21) {
    return number.toString();
  }
  if (typeof fractionDigits === "undefined" || fractionDigits === 0) {
    return Math.round(number).toString();
  }
  let result = number.toString();
  const arr = result.split(".");
  if (arr.length < 2) {
    result += ".";
    for (let i = 0; i < fractionDigits; i += 1) {
      result += "0";
    }
    return result;
  }
  const integer = arr[0];
  const decimal = arr[1];
  if (decimal.length === fractionDigits) {
    return result;
  }
  if (decimal.length < fractionDigits) {
    for (let i = 0; i < fractionDigits - decimal.length; i += 1) {
      result += "0";
    }
    return result;
  }
  result = `${integer}.${decimal.substr(0, fractionDigits)}`;
  let last = decimal.substr(fractionDigits, 1);
  if (/^\d(9){5,}[0-9]$/.test(decimal.substr(fractionDigits))) {
    last = (+last + 1).toString();
  }
  if (parseInt(last, 10) >= 5) {
    const x = 10 ** fractionDigits;
    result = (Math.round(parseFloat(result) * x) + 1) / x;
    result = round(result, fractionDigits);
  }
  return result;
}

export {
  round
};