Simple JavaScript logger with log level and (graceful) fallback

logger.js

Logger = function(level) {
	this.level = level || 0;

	methods = ["trace", "debug", "info", "warn", "error"];
	levels = {};

	this.log = function() {
        (console.log === undefined) ? function() {} : console.log.apply(console, arguments);
	};

	methods.forEach(function(level, index) {
		levels[level] = index;

		this[level] = function() {
			if(this.level - 1 > levels[level]) {
				return; // No need to log at all!
			}

			(console[level] === undefined) ? this.log.apply(null, arguments) : console[level].apply(console, arguments);
		};
	}.bind(this));
}