Category Archives: CSS

Auto Resizing Textarea HTML5 WebComponent

Just finished my next experiment with HTML5 WebComponents. AcidJs.XTextarea is an advanced replacement of the classic <textarea /> HTML element, supporting custom events and auto resizing as-you-type. Check the extensive documentation in the distribution file (click the download button at the top of the demo page) or scroll this page to see the demos.



<acdisj-xtextarea placeholder="Type your message..." id="textarea-1" name="textarea-1" rows="5" cols="40"></acdisj-xtextarea>
<acdisj-xtextarea name="textarea-2" rows="10" cols="30" disabled></acdisj-xtextarea>
<acdisj-xtextarea name="textarea-5" autoresize="off" rows="5" cols="30"></acdisj-xtextarea>
<acdisj-xtextarea autofocus name="textarea-8" cols="60" rows="5"></acdisj-xtextarea>
<acdisj-xtextarea name="textarea-4" hidden></acdisj-xtextarea>

HTML Attributes of the Component

Apart from the form attributes like name, rows, cols, placeholder, spellcheck, autofocus, disabled and readonly etc. and the HTML standard attributes such is id and style AcidJs.XTextarea supports one custom property, allowing to turn the autoresizing off:

  • [autoresize="off"]

JavaScript API – Methods, Accessors and Events

The component supports all standard JavaScript methods querySelector, querySelectorAll, getElementById, etc. plus the following custom methods, accessors and events:


  • enable() – the method enables back a previously disabled textbox by using the disable() method, the enabled accessor or the disabled and readonly properties.
  • disable() – the method disables the queried textbox, so no user input is possible.
  • getValue() – the method returns the current value of the queried textbox, similar to the enabled accessor.
  • setValue(String|null) – the method sets new value to the queried textbox.


  • enabled – gets or sets the enabled state of the textbox. Use Boolean value for the setter.
  • value – gets or sets value of the textbox. The setter requires a string or empty value.


  • type – the event is triggered upon user input and returns an object, containing the current value of the textbox to which the event handler is bound to:
        data: "Lorem ipsum dolor sit amet..."
     * Bind to the "type" event of the textbox
     $("#my-textarea").on("type", function(e, data) {
         window.console.log("textbox event:", e.type, data);

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.

Enabling Placeholders in ContentEditable Elements with CSS

Recently I worked on an HTML5 app, utilizing contenteditable elements. According to the specs of the app, the empty editable elements were supposed to have placeholder texts and since the placeholder attribute is only supported by standard input boxes and textareas I was planning to use JavaScript to enable this functionality in contenteditable elements, but then I decided to try this small CSS trick with generated content and the attr(attribute) function, which actually worked:

The CSS:

    content: attr(data-placeholder);
    font-style: italic;
    opacity: .75;

… And the Markup:

<div contenteditable data-placeholder="Add some text..."></div>

If you are interested in more CSS3, HTML5 WebComponents and JavaScript stuff, make sure you check my experiments website.

Adding Icons to the Option Elements of the Select Tag in Firefox. Quick and Dirty

Below is a quick and dirty solution for adding icons to the <option /> elements of the <select /> tag utilizing CSS generated content.

Disclaimer: According to the CSS specs, the <option /> element should not support generated content, and this solution works only in Firefox. Anyways, it may come handy sometime.

The Result:


The CSS:

.acidjs-cssw-select-icons option::before
    content: "";
    display: inline-block;
    vertical-align: middle;
    margin: 2px 6px 2px 2px;
    width: 16px;
    height: 16px;
    background: url("path/to/the/icon.png") no-repeat center;

The demo and the download link are on this page. If you are interested in more CSS3, HTML5 WebComponents and JavaScript stuff, make sure you check my experiments website.

Collaboration with Webucator

A couple of weeks ago I was contacted by Webucator asking me if I’d be interested in the creation of a video tutorial with my Parallax Page Scroll Effect with Pure CSS3. No JavaScript. No Hassle blog post and experiment. Of course, I was much excited by the idea, especially when I was told that it will be directed and narrated by Chris Minnick from WatzThis – a published author of several amazing books on web development.

The video is available on YouTube already. Enjoy, have a great weekend and make sure you pay a visit to my new friends at Webucator if you are looking for professional online and onsite instructor-led training classes in web- and software development.

5 Years of Ribbon JS!

Ribbon JS is turning 5 this month! If you are planning to purchase a license, now it’s the time. Join the celebration and get any commercial license for the most advanced and feature-complete JavaScript, HTML5 and CSS3 MSOffice-like ribbon control available on the Internet today at a half price only in August 2015!