webpack/lib/SizeFormatHelpers.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Sean Larkin @thelarkinn
*/

"use strict";

/**
 * @param {number} size the size in bytes
 * @returns {string} the formatted size
 */
exports.formatSize = size => {
	if (typeof size !== "number" || Number.isNaN(size) === true) {
		return "unknown size";
	}

	if (size <= 0) {
		return "0 bytes";
	}

	const abbreviations = ["bytes", "KiB", "MiB", "GiB"];
	const index = Math.floor(Math.log(size) / Math.log(1024));

	return `${+(size / Math.pow(1024, index)).toPrecision(3)} ${
		abbreviations[index]
	}`;
};