1 /*! loglevel - v1.6.8 - https://github.com/pimterry/loglevel - (c) 2020 Tim Perry - licensed MIT */
2 (function (root, definition) {
4 if (typeof define === 'function' && define.amd) {
6 } else if (typeof module === 'object' && module.exports) {
7 module.exports = definition();
9 root.log = definition();
14 // Slightly dubious tricks to cut down minimized file size
15 var noop = function() {};
16 var undefinedType = "undefined";
17 var isIE = (typeof window !== undefinedType) && (typeof window.navigator !== undefinedType) && (
18 /Trident\/|MSIE /.test(window.navigator.userAgent)
29 // Cross-browser bind equivalent that works at least back to IE6
30 function bindMethod(obj, methodName) {
31 var method = obj[methodName];
32 if (typeof method.bind === 'function') {
33 return method.bind(obj);
36 return Function.prototype.bind.call(method, obj);
38 // Missing bind shim or IE8 + Modernizr, fallback to wrapping
40 return Function.prototype.apply.apply(method, [obj, arguments]);
46 // Trace() doesn't print the message in IE, so for that case we need to wrap it
47 function traceForIE() {
49 if (console.log.apply) {
50 console.log.apply(console, arguments);
52 // In old IE, native console methods themselves don't have apply().
53 Function.prototype.apply.apply(console.log, [console, arguments]);
56 if (console.trace) console.trace();
59 // Build the best logging method possible for this env
60 // Wherever possible we want to bind, not wrap, to preserve stack traces
61 function realMethod(methodName) {
62 if (methodName === 'debug') {
66 if (typeof console === undefinedType) {
67 return false; // No method possible, for now - fixed later by enableLoggingWhenConsoleArrives
68 } else if (methodName === 'trace' && isIE) {
70 } else if (console[methodName] !== undefined) {
71 return bindMethod(console, methodName);
72 } else if (console.log !== undefined) {
73 return bindMethod(console, 'log');
79 // These private functions always need `this` to be set properly
81 function replaceLoggingMethods(level, loggerName) {
82 /*jshint validthis:true */
83 for (var i = 0; i < logMethods.length; i++) {
84 var methodName = logMethods[i];
85 this[methodName] = (i < level) ?
87 this.methodFactory(methodName, level, loggerName);
90 // Define log.log as an alias for log.debug
91 this.log = this.debug;
94 // In old IE versions, the console isn't present until you first open it.
95 // We build realMethod() replacements here that regenerate logging methods
96 function enableLoggingWhenConsoleArrives(methodName, level, loggerName) {
98 if (typeof console !== undefinedType) {
99 replaceLoggingMethods.call(this, level, loggerName);
100 this[methodName].apply(this, arguments);
105 // By default, we use closely bound real methods wherever possible, and
106 // otherwise we wait for a console to appear, and then try again.
107 function defaultMethodFactory(methodName, level, loggerName) {
108 /*jshint validthis:true */
109 return realMethod(methodName) ||
110 enableLoggingWhenConsoleArrives.apply(this, arguments);
113 function Logger(name, defaultLevel, factory) {
116 var storageKey = "loglevel";
118 storageKey += ":" + name;
121 function persistLevelIfPossible(levelNum) {
122 var levelName = (logMethods[levelNum] || 'silent').toUpperCase();
124 if (typeof window === undefinedType) return;
126 // Use localStorage if available
128 window.localStorage[storageKey] = levelName;
132 // Use session cookie as fallback
134 window.document.cookie =
135 encodeURIComponent(storageKey) + "=" + levelName + ";";
139 function getPersistedLevel() {
142 if (typeof window === undefinedType) return;
145 storedLevel = window.localStorage[storageKey];
148 // Fallback to cookies if local storage gives us nothing
149 if (typeof storedLevel === undefinedType) {
151 var cookie = window.document.cookie;
152 var location = cookie.indexOf(
153 encodeURIComponent(storageKey) + "=");
154 if (location !== -1) {
155 storedLevel = /^([^;]+)/.exec(cookie.slice(location))[1];
160 // If the stored level is not valid, treat it as if nothing was stored.
161 if (self.levels[storedLevel] === undefined) {
162 storedLevel = undefined;
170 * Public logger API - see https://github.com/pimterry/loglevel for details
176 self.levels = { "TRACE": 0, "DEBUG": 1, "INFO": 2, "WARN": 3,
177 "ERROR": 4, "SILENT": 5};
179 self.methodFactory = factory || defaultMethodFactory;
181 self.getLevel = function () {
185 self.setLevel = function (level, persist) {
186 if (typeof level === "string" && self.levels[level.toUpperCase()] !== undefined) {
187 level = self.levels[level.toUpperCase()];
189 if (typeof level === "number" && level >= 0 && level <= self.levels.SILENT) {
190 currentLevel = level;
191 if (persist !== false) { // defaults to true
192 persistLevelIfPossible(level);
194 replaceLoggingMethods.call(self, level, name);
195 if (typeof console === undefinedType && level < self.levels.SILENT) {
196 return "No console available for logging";
199 throw "log.setLevel() called with invalid level: " + level;
203 self.setDefaultLevel = function (level) {
204 if (!getPersistedLevel()) {
205 self.setLevel(level, false);
209 self.enableAll = function(persist) {
210 self.setLevel(self.levels.TRACE, persist);
213 self.disableAll = function(persist) {
214 self.setLevel(self.levels.SILENT, persist);
217 // Initialize with the right level
218 var initialLevel = getPersistedLevel();
219 if (initialLevel == null) {
220 initialLevel = defaultLevel == null ? "WARN" : defaultLevel;
222 self.setLevel(initialLevel, false);
231 var defaultLogger = new Logger();
233 var _loggersByName = {};
234 defaultLogger.getLogger = function getLogger(name) {
235 if (typeof name !== "string" || name === "") {
236 throw new TypeError("You must supply a name when creating a logger.");
239 var logger = _loggersByName[name];
241 logger = _loggersByName[name] = new Logger(
242 name, defaultLogger.getLevel(), defaultLogger.methodFactory);
247 // Grab the current global log variable in case of overwrite
248 var _log = (typeof window !== undefinedType) ? window.log : undefined;
249 defaultLogger.noConflict = function() {
250 if (typeof window !== undefinedType &&
251 window.log === defaultLogger) {
255 return defaultLogger;
258 defaultLogger.getLoggers = function getLoggers() {
259 return _loggersByName;
262 return defaultLogger;