find dead JavaScript code?

Question

We are refactoring a legacy web app and as a result are \"killing\" quite a lot of JavaScript code but we\'re afraid of deleting what we think is dead code due to not being

Answer 1

You could use code optimizers as Google Closure Compiler, however it's often used for minimizing code.

function hello(name) {
alert('Hello, ' + name);
}

function test(){
alert('hi');
}

hello('New user');

Will result in

alert("Hello, New user");

For example.

Another thing you could do is to use Chrome's Developer Tools (or Firebug) to see all function calls. Under Profiles you can see which functions are being called over time and which are not.