Updating the signature to use destructuring, removing edge case assignments on invalid inputs (fail by design)

Author: avoidwork

lib/filesize.es6.js

@@ -3,31 +3,34 @@
  *
  * @copyright 2022 Jason Mulligan <[email protected]>
  * @license BSD-3-Clause
- * @version 9.0.0
+ * @version 9.0.1
  */
 (function (global, factory) {
 	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
 	typeof define === 'function' && define.amd ? define(factory) :
 	(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.filesize = factory());
 })(this, (function () { 'use strict';
 
-	const symbol = {
-			iec: {
-				bits: ["bit", "Kibit", "Mibit", "Gibit", "Tibit", "Pibit", "Eibit", "Zibit", "Yibit"],
-				bytes: ["B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"]
+	const strings = {
+			symbol: {
+				iec: {
+					bits: ["bit", "Kibit", "Mibit", "Gibit", "Tibit", "Pibit", "Eibit", "Zibit", "Yibit"],
+					bytes: ["B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"]
+				},
+				jedec: {
+					bits: ["bit", "Kbit", "Mbit", "Gbit", "Tbit", "Pbit", "Ebit", "Zbit", "Ybit"],
+					bytes: ["B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"]
+				}
 			},
-			jedec: {
-				bits: ["bit", "Kbit", "Mbit", "Gbit", "Tbit", "Pbit", "Ebit", "Zbit", "Ybit"],
-				bytes: ["B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"]
+			fullform: {
+				iec: ["", "kibi", "mebi", "gibi", "tebi", "pebi", "exbi", "zebi", "yobi"],
+				jedec: ["", "kilo", "mega", "giga", "tera", "peta", "exa", "zetta", "yotta"]
 			}
 		},
-		fullform = {
-			iec: ["", "kibi", "mebi", "gibi", "tebi", "pebi", "exbi", "zebi", "yobi"],
-			jedec: ["", "kilo", "mega", "giga", "tera", "peta", "exa", "zetta", "yotta"]
-		},
 		roundingFuncs = {
+			ceil: Math.ceil,
 			floor: Math.floor,
-			ceil: Math.ceil
+			round: Math.round
 		};
 
 	/**
@@ -38,35 +41,21 @@
 	 * @param  {Object}  descriptor [Optional] Flags
 	 * @return {String}             Readable file size String
 	 */
-	function filesize (arg, descriptor = {}) {
-		let result = [],
+	function filesize (arg, {bits = false, pad = false, base = 10, round = 2, locale = "", localeOptions = {}, separator = "", spacer = " ", symbols = {}, standard = "iec", output = "string", fullform = false, fullforms = [], exponent = -1, roundingMethod = "round", precision = 0} = {}) {
+		let e = exponent,
+			num = Number(arg),
+			result = [],
 			val = 0,
-			e, base, bits, ceil, full, fullforms, locale, localeOptions, neg, num, output, pad, round, u, separator, spacer, standard, symbols, roundingFunc, precision;
+			u = "";
+		const ceil = base === 10 ? 1000 : 1024,
+			full = fullform === true,
+			neg = num < 0,
+			roundingFunc = roundingFuncs[roundingMethod];
 
 		if (isNaN(arg)) {
 			throw new TypeError("Invalid number");
 		}
 
-		bits = descriptor.bits === true;
-		pad = descriptor.pad === true;
-		base = descriptor.base || 10;
-		round = descriptor.round !== void 0 ? descriptor.round : 2;
-		locale = descriptor.locale !== void 0 ? descriptor.locale : "";
-		localeOptions = descriptor.localeOptions || {};
-		separator = descriptor.separator !== void 0 ? descriptor.separator : "";
-		spacer = descriptor.spacer !== void 0 ? descriptor.spacer : " ";
-		symbols = descriptor.symbols || {};
-		standard = descriptor.standard in symbol ? descriptor.standard : "iec";
-		output = descriptor.output || "string";
-		full = descriptor.fullform === true;
-		fullforms = descriptor.fullforms instanceof Array ? descriptor.fullforms : [];
-		e = descriptor.exponent !== void 0 ? descriptor.exponent : -1;
-		roundingFunc = roundingFuncs[descriptor.roundingMethod] || Math.round;
-		num = Number(arg);
-		neg = num < 0;
-		ceil = base > 2 ? 1000 : 1024;
-		precision = isNaN(descriptor.precision) === false ? parseInt(descriptor.precision, 10) : 0;
-
 		// Flipping a negative number to determine the size
 		if (neg) {
 			num = -num;
@@ -97,7 +86,7 @@
 		// Zero is now a special case because bytes divide by 1
 		if (num === 0) {
 			result[0] = 0;
-			u = result[1] = symbol[standard][bits ? "bits" : "bytes"][e];
+			u = result[1] = strings.symbol[standard][bits ? "bits" : "bytes"][e];
 		} else {
 			val = num / (base === 2 ? Math.pow(2, e * 10) : Math.pow(1000, e));
 
@@ -113,12 +102,12 @@
 			const p = Math.pow(10, e > 0 ? round : 0);
 			result[0] = roundingFunc(val * p) / p;
 
-			if (result[0] === ceil && e < 8 && descriptor.exponent === void 0) {
+			if (result[0] === ceil && e < 8 && exponent === -1) {
 				result[0] = 1;
 				e++;
 			}
 
-			u = result[1] = symbol[standard][bits ? "bits" : "bytes"][e];
+			u = result[1] = strings.symbol[standard][bits ? "bits" : "bytes"][e];
 		}
 
 		// Decorating a 'diff'
@@ -153,7 +142,7 @@
 		}
 
 		if (full) {
-			result[1] = fullforms[e] ? fullforms[e] : fullform[standard][e] + (bits ? "bit" : "byte") + (result[0] === 1 ? "" : "s");
+			result[1] = fullforms[e] ? fullforms[e] : strings.fullform[standard][e] + (bits ? "bit" : "byte") + (result[0] === 1 ? "" : "s");
 		}
 
 		// Returning Array, Object, or String (default)