Your browser's console api now minimally conforms :-p

minimal-console.js

(function(){
    var noOp = function(){};
    var methods = [
        'assert','clear','count','debug','dir','dirxml','error','exception',
        'group', 'groupCollapsed', 'groupEnd', 'info', 'isIndependentlyComposed',
        'log', 'profile', 'profileEnd', 'timeEnd', 'timeStamp', 'trace', 'warn'
    ];
    methods.forEach(function (name) {
        if( !console[name] ) {
            console[name] = noOp;
        }
    });
}())