CODEWITHSUNDEEP
javascriptecmascript-6es6-class
erol_smsr
erol_smsr

Reputation: 1496

Using a ES6 class instead of a constant and export it

I'm a little confused about coding with classes in ES6. Suppose I want to create a simple library similar to JS. I create a module like so in my library.js:

const $ = (...args) => {
    if (typeof args[0] === 'function') {
    const docReadyFn = args[0];

    document.addEventListener('DOMContentLoaded', docReadyFn);
  }
}

module.exports = $;

I then require this file in index.js:

const $ = require('./library');

module.exports = $;

And use it in another file:

const $ = require('./library');

$(() => {
    console.log('DOM ready!');
});

However, instead of doing const $ = (...args) => { ... } I want to make a class with a constructor like this:

class Library {
    constructor(...args) {
        if (typeof args[0] === 'function') {
            const docReadyFn = args[0];

            document.addEventListener('DOMContentLoaded', docReadyFn);
        }
    }
}

module.exports = Library;

Is it wise to do it this way? And with classes I have to create a new instance with new Library(args), but with by exporting const $ = (...args) => { ... } I can simply use $ without doing anything. No new instance or anything. How can I use classes to achieve the same thing as creating a const and exporting that and using it right away?

Upvotes: 0

Views: 159

Answers (1)

Bergi
Bergi

Reputation: 665276

A class must always be called with new, and will create a new instance.
Your $ function does not create objects - it should not be a class.

Upvotes: 2

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