How to override the window.open functionality?

Question

Let\'s say I have window.open (without name parameter), scattered in my project and I want to change the implementation so that wherever name is not specified I\'ll specify

Answer 1

To avoid circular calls, you need to stash away the original window.open function in a variable.

A nice way (that doesn't pollute the global namespace) is to use a closure. Pass the original window.open function to an anonymous function as an argument (called open below). This anonymous function is a factory for your hook function. Your hook function is permanently bound to the original window.open function via the open argument:

window.open = function (open) {
    return function (url, name, features) {
        // set name if missing here
        name = name || "default_window_name";
        return open.call(window, url, name, features);
    };
}(window.open);