更换 window.setTimeout

Question

Guys, I'm thinking of replacing window.setTimeout with a function of my own (for example we could have a generic error handler for exceptions thrown in callbacks).

The code will be along these lines:

var nativeSetTimeout = window.setTimeout;
window.setTimeout = function(fn, interval){
    nativeSetTimeout(function(){
            try{
               fn();
            }catch(e){
                // handle errors coming from the execution of fn
            }
        }, interval);
}

Given that my app will stay in a single iframe, is there any outstanding issue that I should be concerned about?

Answer 1

I wouldn't do that because it's true it can help in your own development, but replacing standard functions could break third-party libraries.

Basically, using your own function without replacing standard one should be the way to go. Use it in your code.

Answer 2

You could do it that way, but unless you're deliberately trying to intercept the behaviour of existing code or third party libraries, it would be clearer to just write a wrapper with an alternative name, Eg function setSafeTimeout(fn, timeout) {... ; return setTimeout(fn, timeout);} function setSafeTimeout(fn, timeout) {... ; return setTimeout(fn, timeout);} .