Straightforward Way to Extend Class in Node.js

Question

I am moving a plain Javascript class into Node.js. In the plain Javascript I use:

class BlockMosaicStreamer extends MosaicStreamer{
}

I can't seem to find a simple way to implement this in Node.js. In my node project in BlockMosaicStreamer.js I have:

'use strict'; 
function BlockMosaicStreamer(){
} 

How would I extend MosaicStreamer which is in ./MosaicStreamer.js?

'use strict'; 
function MosaicStreamer(){
} 

Solution

It depends how you defined your first class, I suggest using something like this:

class SomeClass {
}

module.exports = SomeClass

then in your extend:

const SomeClass = require('./dir/file.js')

class MyNewClass extends SomeClass {
}

module.exports = MyNewClass

Comments

[Sara Fuerst]

However, my classes are defined as shown in the question. Using class in node causes a lot of issues

[Bergi]

@tibsar: Then use a transpiler. There should be nothing that stops you from using ES6 today.

[Nick Messing]

@tibsar, you can update node.js, I'm using 5.9.1 and it works just fine.

[Sara Fuerst]

Is there absolutely no way to do it the way I'm doing it?

[Nick Messing]

@tibsar, it will take way more time then writing in es6 and transpiling or updating node

[Sara Fuerst]

@NickMessing Can you show me how you would do it this way?

[Nick Messing]

@tibsar, take a look at typescriptlang.org/play choose Classes Example and take a look at JavaScript result.