OO JavaScript

Online Color Picker and Color Conversion Tool

Just a few hours ago I finished and deployed my new online service and very first endeavor in the interesting world of colors and color theory. Say hi to AcidJs.ColorConverter!


  • Native HTML5 color picker.
  • Color conversion to and from HEX, RGB, HSL, CMYK, HSV,  etc.
  • Color tints, tones and shades.
  • CMYK and RGB color charts, powered by Google Charts.
  • Inspirational color schemes.
  • Detailed information about the selected color.
  • Option to save the raw JSON data, containing the details of the selected color.
  • About 900 named color equivalents.

Built on top of HTML5 WebComponents (AcidJs.XTabs and AcidJs.XOverlay), and utilizing Object.observe() and the (not-so-new) input “color” type (sorry, no fallback for browsers, which do not support it and that’s on purpose!) and using the data from the brilliant ColorHexa service, which I transform to JSON via the REST API running on my server.


The color picker:


Raw data viewer:


RGB and CMYK color charts


Color conversions table


Advanced view – shades, tints, tones and schemes


Editor tab


Check it on this page and have fun!

If you share the same interest towards HTML5 Web Components as I do these days, make sure you read my relevant blog posts and further endeavors on my HTML5, CSS3 and JavaScript Experiments and Insight website.


The HTML5, CSS3 and JavaScript Experiments Website Has Just Received a Facelift

It’s been more than a year since launched HTML5, CSS3 and JavaScript Experiments to share my insight in front-end development and I never thought that it would become that popular in a relatively short period of time. As of September 2014 the website showcases than 60 demos also available for download and because of that constantly growing number and devout visitors (Thanks, fellows, you are the ones that keep this up and running!) I realized that the old layout became less usable and demands something new. The time for a facelift had come and this is what I did during the past few days.

Due to my recent excitement and digging into the amazing world of HTML5 Web Components, I decided to take the risk of losing page-views due to browser incompatibility and implemented the front-end using custom-built web components, some of which such as AcidJs.XImg (used for optimizing the loading of images) and AcidJs.XTabs (used for the code listing at the bottom of each page) are already featured on the website. Apart from these two, I developed AcidJs.XDrawer, which is used for the left hand navigation, and it will be soon available as a standalone demo and download.  The utilization of reusable HTML5 Web Components allowed me to remove a lot of custom JavaScript and CSS, which optimized the overall performance and loading time. The currently supported browsers are all evergreen browsers and IE10+.

As a bottom line – I am really happy with the result, and I hope that the website will continue being a useful and inspirational source for front-end developers, sharing the same passion towards HTML5, CSS3 and JavaScript.

Thanks and enjoy!

Extended File Upload Input, Wrapped as a HTML5 Web Component

Yesterday I finished my latest endeavor of the explorations of the amazing world of HTML5 Web Components. I must say that the deeper I get into the topic, the more I understand their importance, and I am pretty sure that very soon (even much sooner that I dared to speculate a couple of months ago) they will become really popular.


The new component is called AcidJs.XUpload, and is an extended input element for uploading files, similar to <input type=”file” />, but with a lot of additional out-of-the-box features such as multiple/directory upload, icon support, editing of the file list, custom events and last but not least – fully skinnable via CSS. Using it is charming, stylish and so HTML5:

<acidjs-xupload width="140" height="44" name="file-02" label="Select files"></acidjs-xupload>
<acidjs-xupload id="file-02" name="file-02" label="Browse for files" multiple></acidjs-xupload>
<acidjs-xupload width="150" height="54" icon="AcidJs.XUpload/icons/icon-01.svg"></acidjs-xupload>
<acidjs-xupload directory label="Select a Folder to Upload"></acidjs-xupload>
<acidjs-xupload multiple accept=".gif" label="Select GIFs"></acidjs-xupload>
<acidjs-xupload multiple accept="image/*" label="Select Images"></acidjs-xupload>
<acidjs-xupload multiple accept="video/*" label="Select Videos"></acidjs-xupload>

HTML Attributes

Any native HTML attribute (id, class, data-*, style, etc.) is supported, plus the component-specific:

  • width – Optional width of the component. Default is auto.
  • height – Optional height of the component. Default is 2em.
  • name – Optional name of the component which will be used as query parameter. No default name.
  • label – Optional label of the component. Default is Browse....
  • icon – Optional icon of the component. By default no icon is set.
  • disabled – If set, the component will be rendered disabled.
  • multiple – If set, multiple selection will be enabled, so users will be able to select multiple files via Ctrl/Shift + Click or Ctrl + A.
  • accept – Allows the setting of file filters (Check the examples for browser support).
  • directory – If set, users will be able to upload a whole directory and sub-directories (Check the examples for browser support).
  • nofiles – If set, users will be able to remove items from the drop down, containing the currently selected files.

* Due to security reasons, setters and getters are disabled.

JavaScript Methods

Any native JavaScript method (getElementById, querySelector, etc. plus the component-specific:

  • getPostData() – returning the current FileList, which can be used to upload the data to the server (check the information on this page for more info regarding FileList).

* Due to security reasons, setAttribute and removeAttribute will not take effect.

JavaScript Events

  • "acidjs-xupload-change" – Similar to the normal change event, but returning the FileList, which can be used to upload the data to the server (check the information on this page for more info regarding FileList):
    $("#file-02").bind("acidjs-xupload-change", function(e, data) {
        window.console.log(e.type, data);

Check the demo on this page. You will also find a download link there. If you share the same interest towards HTML5 Web Components as I do these days, make sure you read my relevant blog posts and further endeavors on my HTML5, CSS3 and JavaScript Experiments and Insight website.

Custom HTML5 Tag to Show Your Favorite Music Albums on Your Website or Blog

Sometime ago I used Last.Fm’s REST API to show some of my favorite albums on my website. The current implementation is using JavaScript, CSS3, HTML5, PHP and client-side rendering and I’m pretty happy with it. However, I’ve always fancied a simple reusable HTML tag, which would be able to render my favorite music albums’ cover art, track listing, genres and info without the hassle of additional coding. So, here it is – my most recent experiment with HTML5 Web Components: X-CD-Info.

What it can do for you is to save you the nag of writing custom JavaScript, querying Last.Fm’s API then rendering the JSON and styling the result. All you need is:

    artist="Joe Satriani"
    album="Unstoppable Momentum">

… And you will get this:


Or if you prefer a more compact rending, like:



Or… why not go really minimalist, and show the cover art only (of course, everyone knows that album):

    album="Tapping the Vein">


I love it, I really do, and I had real fun developing it. Moreover, apart from the tag itself, you have a couple of handy native JavaScript methods and HTML attributes:

HTML Attributes of the Tag

Any native HTML attribute (id, class, data-*, style, etc.) is supported, plus the component-specific:

  • artist – Required artist name to search on Last.Fm.
  • album – Required album name to search on Last.Fm.
  • mode – Optional display mode of the component. The default mode is "full". "compact" and "minimal" are the other two options.

JavaScript Methods

Any native JavaScript method (document.getElementById, document.querySelector, element.setAttribute, element.removeAttribute etc.
as well as their jQuery or other libraries aliases), plus the component-specific:

  • render(artist, album, mode) – Render album info in the queried acidjs-xcdinfo element. The mode parameter is optional and if not set to
    any of the "full", "compact" or "minimal", the "full" mode will be used. Example:

    • JavaScript:
      document.querySelector("#album-02").render("Steve Vai", "Passion and Warfare", "full");
      document.getElementById("#album-02").render("Steve Vai", "Passion and Warfare", "full");
    • jQuery:
      $("#album-02").get(0).render("Steve Vai", "Passion and Warfare", "full");
  • getData() – Get the stored current DTO, received from Last.Fm. Example:
    • JavaScript:
    • jQuery:

In order to use X-CD-Info you will need to get an API key from Last.Fm. If you don’t have one already, get it here. It’s free, and Last.Fm rocks.

Sounds good? Check it and get it here. Find @wemakesitesnet on Twitter and let me know what you think.

Sharing the same interest towards HTML5 Web Components? Check my other experiments, related to that exciting technology. If you are interested in similar 3rd-party widgets or APIs make sure you check my IMDB Fetcher project.

Rock and Roll!


X-Meme: A Modern HTML5 Approach to Memes. You don’t say?

Memes have been circulating the Internet for many years and are among the few phenomena whose creation approach never changed (and never will). Dare to imagine a meme without the sloppy white font, black stroke and huge text shadow?  The charm of memes is not only in the witty phrases, but also in that particular design belonging to the Mid ’90s, Paint, PSP and other even more obscure image editors.

In the era of HTML5, memes keep going strong and refuse to die, so here is a fun experiment – a custom HTML5 Web Component, making possible the creation of memes via a simple HTML tag, built on top of Mozilla’s X-tags. Meet X-Meme:

    caption-top="I don't always play the guitar"
    caption-bottom="But when I do, I do it when my hoomans are sleeping">

The code above will render:


Attributes of the <acidjs-xmeme></acidjs-xmeme> Tag:

  • src – path to the meme image (required).
  • caption-top – optional top caption.
  • caption-bottom – optional bottom caption.

The current version is using HTML and CSS for rendering, but for the next I’m planning optional canvas rendering. Until then, you may check the demo and eventually download and use it. These days I am particularly interested in HTML5 Web Components, so if you share the same interest you may want to check my other experiments.

Slides Viewer: HTML5 Web Component

One of my experiments with atypical uses of radio buttons I blogged about sometime ago was the CSS3 Driven Slides Viewer Without any JavaScript, and soon after it was published, became one of my most popular posts, but busy with other stuff I never took the time to extend or improve it. Until yesterday, when I decided to rework it as a HTML5 Web Component as part of my recent amusement with this new and exciting aspect of HTML5.

The result is that now users could easily create a full-blown slides viewer just by utilizing this simple markup:

    <acidjs-xslides-slide>Slide content - simple text or complex HTML</acidjs-xslides-slide>
    <acidjs-xslides-slide>Another slide content - simple text or complex HTML</acidjs-xslides-slide>
    <acidjs-xslides-slide>Yet another - simple text or complex HTML</acidjs-xslides-slide>

You can check the demo and download X-Slides on my Experiments and Insight website, and if you are interested in HTML5 Web Components, X-Tags or Google Polymer, you will probably find inspiration in my other endeavours with this technology.

X-Tabs – HTML5 Web Component Built with Mozilla X-Tags

Last night I introduced a new “html5 web components” category on my HTML5, CSS3 and JavaScript Experiments and Insight Website, so now all of the examples, which deal with this new and amazing technology are separated from the CSS and the JavaScript demos. Apart from that, I released a new component, based on Mozilla’s X-Tag and utilizing the JavaScript-less tabstrip solution I blogged about a sometime ago.

The component is called X-Tabs and allows declarative creation of fully functional tabs without any JavaScript:

<acidjs-xtabs width="100%" height="200" selectedtab="0" name="my-x-tab-01">
    <acidjs-xtabs-pane label="Home" hint="Go to our homepage">
        <p>Lorem ipsum.</p>
    <acidjs-xtabs-pane label="About Us" hint="More info about us">
        <h3>About Us</h3>
        <p>Sed ut perspiciatis?</p>
    <acidjs-xtabs-pane label="Downloads" hint="Visit our downloads section">
        <p>At vero eos et accusamus.</p>
    <acidjs-xtabs-pane label="Contact Us" hint="Give us a shout">
        <h3>Contact Us</h3>
    <acidjs-xtabs-pane label="Disabled Tab" hint="Give us a shout" enabled="false">
        <h3>Disabled Tab</h3>
        <p>Just a disabled tab.</p>
    <acidjs-xtabs-pane label="Yet Another Tab" hint="And Yet Another Tab">
        <h3>Disabled Tab</h3>
        <p>Lorem ipsum dolor sit amet.</p>


Have fun with the demo and feel free to modify and use the source code. If you like what I’m doing, follow me on Twitter or check my other posts about HTML5 Web Components, CSS3 or JavaScript.