haw-utils/lib/math/round.js

一个基于业务场景的工具方法库

(function (global, factory) {
  if (typeof define === "function" && define.amd) {
    define(["exports", "./divide", "./times"], factory);
  } else if (typeof exports !== "undefined") {
    factory(exports, require("./divide"), require("./times"));
  } else {
    var mod = {
      exports: {}
    };
    factory(mod.exports, global.divide, global.times);
    global.round = mod.exports;
  }
})(typeof globalThis !== "undefined" ? globalThis : typeof self !== "undefined" ? self : this, function (_exports, _divide, _times) {
  "use strict";

  Object.defineProperty(_exports, "__esModule", {
    value: true
  });
  _exports["default"] = void 0;
  _divide = _interopRequireDefault(_divide);
  _times = _interopRequireDefault(_times);
  function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
  /**
   * 四舍五入，支持设置精度
   * 
   * @static
   * @alias module:Math.round
   * @since 3.1.0
   * @param {Number} num 要四舍五入的数字
   * @param {Number} [precision=0] 四舍五入的精度
   * @returns {Number} 四舍五入的数字
   * @example
   * 
   *  round(4.006);
   *  // => 4
   * 
   *  round(4.006, 2);
   *  // => 4.01
   * 
   *  round(4060, -2);
   *  // => 4100
   */
  function round(num) {
    var precision = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
    var base = Math.pow(10, precision);
    return (0, _divide["default"])(Math.round((0, _times["default"])(num, base)), base);
  }
  var _default = round;
  _exports["default"] = _default;
});