Simple methods added to native browser objects.

DOM extensions

To generate:

<section class="big red">
<h1>Title</h1>
<p>Paragraph</p>
<p>Paragraph</p>
</section>

in clean javascript you need to write

let section=document.createElement('section');
section.className='big red';
let h1=document.createElement('h1');
h1.textContent='Title';
section.appendChild(h1);
let p1=document.createElement('p');
p1.textContent='Paragraph';
section.appendChild(p1);
let p2=document.createElement('p');
p2.textContent='Paragraph';
section.appendChild(p2);
document.body.appendChild(section);

But using this lib you type:

import 'prototype-extensions';

var section=document.body.addChild('section.big.red');
section.addChild('h1', {text:'Title'});
section.addChild('p', {text:'Paragraph'});
section.addChild('p', {text:'Paragraph'});

avalible methods

document.create(selector, attributes)

Generates and returns new element. You can define an element on two ways:

• selector string - css-like selector
• attributes object

In this example all three elemens will be identical:

let a = document.create('p#first.red');
let b = document.create({tagname:'p',id:'first',className:'red'});
let c = document.create('p',{id:'first',className:'red'});

element.addChild(selector, attributes)

Works like previous, but also adds created object by element.appendChild()

Array extensions

var array = [5,2,-3,11];
console.log(array.min(x=>x))// -> -3
console.log(array.min(x=>Math.abs(x)))// -> 2
console.log(array.sum(x=>(x>0)?1:0))// -> 3

Read more

https://thebugger.home.blog/2019/10/20/javascript-tricks-1-extendings-prototypes/