Question

I’m working on a simple example; I can get it to work with Javascript, but there is something wrong with my CoffeeScript version.

Here is person.coffee:

module.exports = Person

class Person 
    constructor: (@name) ->

    talk: ->
        console.log "My name is #{@name}"

And here is index.coffee:

Person = require "./person"
emma = new Person "Emma"
emma.talk()

I am expecting to run index.coffee and see the console output “My name is Emma”. Instead, I am getting an error saying TypeError: undefined in not a function.

Answer 1

Put the module.exports line at the bottom.

—-person.coffee—-

class Person 
    constructor: (@name) ->

    talk: ->
        console.log "My name is #{@name}"

module.exports = Person

---

Person = require "./person" // [Function: Person]
p = new Person "Emma" // { name: 'Emma' }

When you assign to module.exports at the top, the Person variable is still undefined.