undless / ki.js

ki.js is a super-tiny jQuery-like 554-bytes JavaScript Library

ki.js

ki.js is a super-tiny jQuery-like JavaScript Library (552 bytes | 347 gzipped)

Browser support

ki.js (recommended) version is supported by the following browsers: IE9+, Chrome 6+, Safari 5+, Firefox 6+, Opera 11.5+.

ki.ie8.js version is supported by the previous browsers including IE8. (811 bytes | 468 gzipped)

What can I do with ki.js?

With ki.js you can do the basic stuff jQuery can, for example:

DOM Ready?

$(function () {
  // this will be executed when the dom is ready!
  alert('Hey the DOM is ready ;)');
});

This was just ki.js, no jQuery

CSS Selectors

Use any CSS selector that exists to get elements from the DOM.

$('p:nth-last-of-type(2)');
$('[attribute|=value]');
$('p:not(.note)');
$('p:empty');

See a list of all CSS selectors

Events

Yes, events with the known .on() and .off() methods

<button>ki.js</button>

$(function () {
  // ok now that the dom is ready i would like to add some events
  var alertMyName = function () {
    alert('My name is ' + this.textContent); // will allert 'ki.js'
  };
  
  $('button').on('click', alertMyName);
  // to turn it off just use .off()
  //$('button').off('click', alertMyName);
});

You can add any JavaScript event even touch events for mobile, under the hood ki.js uses addEventListener, so feel free to use any valid ECMAScript 5 event.

.each()

The each() is also included in the core of ki.js for easy iterating a DOM collection.

$(function () {
  // get all p tags
  $('p').each(function (elem, i) {
    // change color to red
    elem.style.color = 'red';
    // append the index to the text
    elem.textContent += i;
  });
});

Keep the chain!

All methods of ki.js are chainable, just like jQuery.

Plugins?

Yeah, you could write plugins for ki.js if you want, fork the project for making them, keep them super super xxs and I promise to merge them into the official repo.

How to make plugins?

Just add your methods to the prototype of ki.js and you're done. For example, let's add a text() method for setting or getting the text of the elements, in the tiniest way I can think of:

// minified is 106 bytes
$.prototype.text = function (a) {
  return a === []._ ? this[0].textContent : this.each(function (b) {
    b.textContent = a
  })
};

Now use the plugin just like the other methods:

$(function () {
  // <p>hello</p>
  
  // get the text from the p tag
  console.log($('p').text()); // hello
  
  // set another text
  $('p').text('bye'); // bye
});

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Create your own plugin and let's make the tiniest JavaScript Library ever! Remember to write byte-saving code, see this [useful resource for JavaScript byte-saving techniques](https://github.com/jed/140bytes/wiki/Byte-saving-techniques) written by 140byt.es community

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Where can i use ki.js?

In every cool and modern browser.

The Code

The code of ki.js was written for byte-saving, so I don't recommend using this script for a real application or website. It was done for fun, and the funniest part is that it actually works :)

License

See LICENSE.txt