JavaScript: can I somehow strong type function parameters?

Question

I am a newbie with JavaScript and I feel the unresistible need to strong type my functions parameters for a couple of tools I am coding:

1. That would give me autocompletion within those functions
2. Debugging/function access gets more consistent

After some googling, I guess this isn't directly possible. However, are there common tools to emulate this rather simply?

What are your thoughts?

Answer 1

People writing "you shouldn't use it" are wrong. In the next Java Script 2.x specification there is a plan to add strong typed variables.

Meanwhile you may use very simple solution to emulate strong types:

var = Object.create( String );

After that autocompleting in a lot of IDE (including IntelliJ IDEA) will work great and you have declared and initialized an object of specified type.

Read more on my blog.

Answer 2

No, you can't and even if there is a way you shouldn't. JavaScript is a dynamically typed language. For auto completion you can however use JSDoc style documentation tags that give some type pointers:

var Person = {
    /**
     * Say hi
     * @param {String} name The name to say hi to
     * @return {String}
     */
    sayHi : function(name)
    {
        return 'Hi ' + name;
    }
}

If they are being used depends entirely on your IDE though.