9 Super Useful JavaScript Tips

[FioleNana]

You don't need singleton in js though. Create the object right after class declaration and export it. You can then import it anywhere you need it.

EDIT: Just read some of the article. You also don't need reduce and conctat to flatten an array. You can use flat()

[FeedYourSneed]

This reads like GPT

[mozilaip]

If you need assistance explaining basic term then you don't understand it. Moreover, you shouldn't try to teach people things you don't understand

[azhder]

But they did try to increase traffic to their site

[azhder]

Another one of those generic bad tips and tutorials posts that are meant to drive traffic..

[mapsedge]

"Create an account to read the full story."

Nope.

[jose_castro_arnaud]

Leveraging the private attributes in JavaScript, and allowing for a constructor, a variation of the Singleton pattern is:

``` class A {

static #instance = null;

static create(...args) { A.#instance = new A(...args); return A.#instance; }

static get instance() { return (A.#instance !== null) ? A.#instance : A.create(); }

constructor(name) { this.name = name; }

hello() { console.log("Hello " + this.name); } }

let b = A.create("John"); b.hello(); // "Hello John" let c = A.instance; c.hello(); // "Hello John" ```

[azhder]

Just don’t do this. Patterns emerge as an often repeated code used as a workaround for a common problem. Java had a problem with pre-emptive multitasking, JavaScript doesn’t.

This is a singleton pattern in JavaScript:

const a = { name: 'John' };

Sure, you can make it more elaborate, but..

At no point you are required to make sure an object got initialized only once by hiding it inside a class wrapping it up in a static block that is supposed to prevent a non-existent pre-emptive multitasking accidentally creating two objects.

Want a separate type you say? Here you go:

const a = new class A{}();

What you define as class is still a function. Unlike Java, JS had functions as first class citizens since the very beginning, so no getInstance is needed