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balajs

bala.js npm version

A function for elements selection in 255 ASCII chars

bala.js is a function that allows you easily select elements on a web page and get rid of jQuery in most of cases.

const buttons = $('.button');

You can use it as a global variable on your page

<script>
$=((a,b,c)=>(c=((d,e,f)=>(f=Object.create(c.fn),d&&f.push(...d.dispatchEvent?[d]:""+d===d?/</.test(d)?((e=a.createElement(e)).innerHTML=d,e.children):e?(e=c(e)[0])?e[b](d):f:a[b](d):d),f)),c.fn=[],c.one=((a,b)=>c(a,b)[0]),c))(document,"querySelectorAll");
</script> 

If you don't want to use $ variable just rename it.

foo=...
// instead of 
$=...

And you can use it as a local variable in a script you make

((win, $) => {
    // your code starts here 
    const divs = $('div');
    console.log(divs);
    // your code ends here 
})(window, ((a,b,c)=>(c=((d,e,f)=>(f=Object.create(c.fn),d&&f.push(...d.dispatchEvent?[d]:""+d===d?/</.test(d)?((e=a.createElement(e)).innerHTML=d,e.children):e?(e=c(e)[0])?e[b](d):f:a[b](d):d),f)),c.fn=[],c.one=((a,b)=>c(a,b)[0]),c))(document,"querySelectorAll"));

Or install it via NPM

npm install --save balajs

bala.js is inherited from Array.prototype which means it has the same set of methods as native array has.

More features?

Different types support

bala accepts many kinds of first argument and converts everything into bala instance

$('.one, #two')
$(document.querySelectorAll('.selector'));
$(document.body);
$(element.children);
$(jQuery('.selector'));
$([document.querySelector('.one'), document.querySelector('.two')])

That means when you make your own library (e. g. VanillaJS plugin) you can use bala in case if you don't know which arg type will be passed by a programmer.

const myCoolLibrary = (el) => {
  el = $(el);
  // ... 
};

$.one

Getting zero-indexed element in DOM libraries is annoying. bala has one little static method called $.one which selects only one element.

$.one('.button');
//vs 
$('.button')[0];

This function is also created to get rid of extra variables (usually DOM libraries make two vars: $$ and $) which means you can import bala nicely via module system.

AMD

require(['path/to/bala/umd/bala.umd.js'], ($) => {
    // ... 
});

CommonJS

const $ = require('path/to/bala/bala.umd.js');

CommonJS + NPM

const $ = require('balajs');

ECMAScript 2015

import $ from 'balajs';

Find elements inside another element

const elements = $('.my-selector', someParent);
// or 
const element = $.one('.my-selector', someParent);

Parse HTML

Simple parsing.

const div = $('<div><span class="yeah"></span></div>');

Contextual HTML parsing

In case if you need to parse HTML which contains contextual elements (td, tr, option) you can pass a context tag name as a second argument.

const cells = $('<td>foo</td><td>bar</td>', 'tr')

Plugins

You can extend bala as easily as you do it with jQuery or Zepto. Use fn property to define your own plugin.

$.fn.toggle = (boolean) => {
    for(let node of this) {
        node.hidden = boolean;
    }
};
 
$('.button').toggle(false); // hides all buttons 

I need more examples!

Add style

for(let element of $('.my-selector')) {
    element.style.color = 'red';
}

In case if you need to set style only for one element you can use $.one.

$.one('.my-selector').style.color = 'red';

Events delegation

for(let element of $('.my-selector')) {
    element.addEventListener('click', function ({ target }) {
        if (this.contains(target.closest('.delegated-selector'))) {
            alert('yep!');
        }
    });
}

Or

$.one('.my-selector').addEventListener('click', function ({ target }) {
    if (this.contains(target.closest('.delegated-selector'))) {
        alert('yep!');
    }
});

Elements removal

for(let element of $('.my-selector')) {
    element.remove();
}

Or

$.one('.my-selector').remove();

Animations

Use element.animate for smooth GPU-accelerated animations. You may need polyfill for Web Animations API.

$.one('.my-selector').animate([
  {transform: 'translate(' + snowLeft + 'px, -100%)'},
  {transform: 'translate(' + snowLeft + 'px, ' + window.innerHeight + 'px)'}
], {
  duration: 1500,
  iterations: 10,
  delay: 300
});

Do you still need jQuery?