I have some code that looks like
self = @ and then later on it's using @someMethodName or self.someMethodName
Does @ have some special meaning?
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问题:
回答1:
@ is not a valid character for a javascript identifier. Identifiers may only contain $, _, digits and letters.
In coffeescript, @ means this.
CoffeeScript has a few nice features related to the this keyword. First, CoffeeScript uses the @ symbol as shorthand for this.. For example, @foo is equivalent to this.foo. Second, if you use the @ symbol in the parameters of a function, CoffeeScript will automatically assign those values as properties of the object.
Edit: As far as jQuery is concerned, the same identifier rules as javascript apply since jQuery is just javascript. For other uses of @ in jQuery, see this question or the docs.
回答2:
@ is shortcut for this in coffeescript
So
self = @ is coffeescript for:
var self = this;