google_closure_examples.js

// Google Closure Compiler examples
// Malformed JS
var foo = {
    attrib1: 'foo',
    attrib2: 'bar', // <--- trailing comma
}

// RESULT: 
// [vincentc@local bad_js]$ gjs --js bad_js.js 
// bad_js.js:8: ERROR - Parse error. Internet Explorer has a non-standard intepretation of trailing commas. Arrays will have the wrong length and objects will not parse at all.
// }
// 
// 1 error(s), 0 warning(s)


// Really wordy JS
var bar = function () {
    // I am a really wordy js file 
    // with many cool comments!
    console.log("I am a debug statement");
    
    x = 10;
    if (true) {
        x = 1 + 1;
        new Ajax.Updater('', {
            // We like to make tons of comments
            onSuccess: function () {
                $('cool_div').hide();
            },
            
            onComplete: function () {
                $('cool_div').show();
            }
        });
    }
    
}

// RESULT (notice: the if block has been removed since it always evals to true. 
// The '1+1' evaluation has just been replaced by 2): 
// [vincentc@local bad_js]$ gjs --js bad_js.js 
// var bar=function(){console.log("I am a debug statement");x=10;x=2;new Ajax.Updater("",{onSuccess:function(){$("cool_div").hide()},onComplete:function(){$("cool_div").show()}})};