Google Closure Compiler Type Annotations For Array

While playing around with Google Closure Compiler, I found a case where I couldn't force the compiler to give a warning for a wrong variable type. I used the following sample: /**

Solution 1:

To force type checking on push, it has to be redefined in code with the correct type. Note that using object literal notation, you have to define the types by using @type instead of @param, because we are assigning the function to a object's parameter, not defining a normal function. In this case it would be the following:

/** @type {function(pendingItem)} */
pending.push = function(item) {
  Array.prototype.push.call(pending, item);
};

Now when trying to compile the following:

// Still an intentionally misspelled "toke"
var dummyItem = {
  name: 'NameHere',
  toke: 'SomeToken' 
};

// First warning
pending.push(dummyItem);

// Second warning
pending[1] = {
  name: 'Second name',
  toke: 'Second Token'
};

Then both will generate a type mismatch warning, like expected.

Thought that it might be useful to somebody in the future.