fenzhi-utils/globalMethods/CustomNumber/CustomNumberNoFixed.js

分值前端项目的js函数库

/**
 * 保留小数(非四舍五入)
 * @param {*} n
 * @param {*} fixed
 * @returns
 */
/**
console.log(CustomNumberNoFixed(10.123456, 2)); // 10.12
console.log(CustomNumberNoFixed(-10.123456, 2)); // -10.12
console.log(CustomNumberNoFixed(NaN, 2)); // -
console.log(CustomNumberNoFixed(null, 2)); // -
console.log(CustomNumberNoFixed('', 2)); // -
console.log(CustomNumberNoFixed(undefined, 2)); // -
console.log(CustomNumberNoFixed(Number.MAX_SAFE_INTEGER, 2)); // 9007199254740991
console.log(CustomNumberNoFixed(Number.MIN_SAFE_INTEGER, 2)); // -9007199254740991
 */
export function CustomNumberNoFixed(n, fixed) {
  const num = parseFloat(n);
  if (isNaN(num)) {
    return '-';
  }
  return ~~(Math.pow(10, fixed) * num) / Math.pow(10, fixed);
}