The error message received is: "EvalError: 'undefined' cannot be used as a function when trying to execute '_class.apply(this, arguments)'"

Every time I attempt to create instances of MyClass(), an error appears.

s = new MyClass();
> TypeError: 'undefined' is not a function (evaluating '_class.apply(this, arguments)')

This is the Class in question:

class MyClass
    constructor: (@value = 'defaultValue')
    ….

Can anyone figure out what is triggering this error?

Answer №1

In order for the constructor to work properly, it must be defined as a function and marked with ->:

class ExampleClass
    constructor: (@data = 'defaultData') ->

See live demo

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