CODEWITHSUNDEEP
javascript
tawheed
tawheed

Reputation: 5821

self() property in javascript

I know that in Javascript, I can call the function self.close() to close my current window. I was wondering what if rather than closing the window I wanted to alert "foo", is that possible?

which in this case my code would look like

   function funky(){
alert("foo");
}

can I do this in my html

self.funky()

To invoke funky? In other words I want to alert my user a message before they close the browser

Upvotes: 2

Views: 132

Answers (3)

zzzzBov
zzzzBov

Reputation: 179086

self is not special other than the fact that it is initially set to reference window. Similarly, in the global context this also refers to window. Within functions, this will be defined to be the context of the function, and self is often used to preserve a context:

function Foo() {
    var self;
    self = this;
    setTimeout(function () {
        self.bar(); //here `self` references the Foo instance
    }, 1000);
}
Foo.prototype = {
    bar: function () {
        self.console.log('bar!'); //here `self` references `window`
    }
}
new Foo();

Upvotes: 0

Anoop
Anoop

Reputation: 23208

self and window are same object

   self === window  // true

Upvotes: 0

Pointy
Pointy

Reputation: 413747

The global property "self" is just an alias for window (in some browsers). Thus any property of window can be accessed via "self" too.

If you declare a global function, then it too becomes a property of "self"/window.

Upvotes: 3

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