jquery.console.js

jquery.console.js

/**
 * jQuery wrapper/plugin for console functions in FF/IE/Chrome.
 *
 * These functions execute silently when no console is available, so
 * you can safely leave diagnotics calls in place during development
 * and beta-testing.
 *
 * Examples:
 *
 *    $.log('Hello, World.',1,2,3);
 *    $.warn('foo');
 *    $.assert(1 == 2, 'false'); // prints "false"
 *    $.assert(1 == 1, 'true'); // does not print
 *    
 * Example with chainable functions:
 * 
 *    $('#test')
 *      .log('testing',1,2,3)
 *      .warn('warning!')
 *      .css('color','green');
 *
 * The log() and warn() methods accept variable number of arguments,
 * same as the console.log() and console.warn() methods in FF/IE/Chrome.
 */
(function($) {
    $.each(['log','warn'], function(i,fn) {
        $[fn] = function() {
            if (!window.console) return;
            var p = [], a = arguments;
            for (var i=0; i<a.length; i++)
                p.push(a[i]) && (i+1<a.length) && p.push(' ');
            Function.prototype.bind.call(console[fn], console)
                .apply(this, p);
        };
        
        $.fn[fn] = function() {
            var p = [this], a = arguments;
            for (var i=0; i<a.length; i++) p.push(a[i]);
            $[fn].apply(this, p);
            return this;
        };
    });
    $.assert = function() {
        window.console
            && Function.prototype.bind.call(console.assert, console)
               .apply(console, arguments);
    };
})(jQuery);

/**
 * examples:
 */
$(document).ready(function() {
    $.log('Hello, World.',1,2,3);
    $.warn('foo');
    $.assert(1 == 2, 'false'); // prints "false"
    $.assert(1 == 1, 'true'); // does not print
    
    $('#test')
        .log('testing',1,2,3)
        .warn('warning!')
        .css('color','green');
});