Is there a way to catch an attempt to access a non existant property or method?

Question

For instance this code:

function stuff() {
  this.onlyMethod = function () {
    return something;
  }
}

// some error is thrown
stuff().nonExistant();
         


        

Answer 1

You can also check if the method exists.

if(a['your_method_that_doesnt_exist']===undefined){
//method doesn't exist
}