CoffeeScript callback parameter becomes Object

Question

My callback function is being wrapped as an object when process into JavaScript. The browser throws this error because of it:

Uncaught TypeError: object is not a function

The CoffeeScript:

startCamera: ->
    @media = $('#camera').getUserMedia {},
    success: (obj) ->
        console.log obj
        return
return

The Output:

startCamera: function() {
    this.media = $('#camera').getUserMedia({}, {
        success: function(obj) {
            console.log(obj);
        }
    });
}

How can I build a regular anonymous function for the parameter?

Tanzeel Kazi · Accepted Answer · 2014-03-08 05:45:52Z

1

If I have understood your question correctly you want to pass an anonymous function as the second parameter.

To do that you will need to get rid of the text success: so that your coffeescript looks as follows:

startCamera: ->
    @media = $('#camera').getUserMedia {},
    (obj) ->
        console.log obj
        return
    return

answered Mar 8, 2014 at 5:45

Tanzeel Kazi

3,8371 gold badge20 silver badges22 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

theLucre Over a year ago

Perfect! For readability, is there any way to name anonymous functions inline , or does it need to be declared before it's passed in?

Tanzeel Kazi Over a year ago

@theLucre if readability is a concern you could always add a coffeescript comment above the function like # success:.

Collectives™ on Stack Overflow

CoffeeScript callback parameter becomes Object

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related