Is there any way to make something like the following work in JavaScript?
var foo = { a: 5, b: 6, c: this.a this.b // Doesn't work }; In its current form, this code obviously throws a reference error because this does not reference foo. ButyesIs there any way to make the value in an object literal property dependent on other previously declared properties?
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You can do this:
var foo = { a: 5, b: 6, init: function() { this.c = this.a + this.b; return this; } }.init();This will be some kind of one-time initialization of the object.
Note that you are actually assigning the return value of
init()tofoo, so you mustreturn that value.Well, the only thing I can tell you is
var foo = { a: 5, b: 6, get c() { return this.a + this.b; } } console.log(foo.c) // 11