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Two Lines CSS Framework

Tuesday, October 26, 2010 { 19 Comments }

I love to experiment with CSS layouts. One year ago I made 1 line CSS Framework now here is two lines CSS Framework. Both are mainly build for teaching purposes. Avoid using them in production.

Last week I spotted the article "Announcing The Oxymoron CSS Framework" and I decided to "shrink it" preserving only display:table; and display:table-cell;

Here is the code:

.row { display:table; width:960px; margin:0 auto }
.cell { display:table-cell; vertical-align:top; padding-left:10px }


With this two lines of CSS you can build n. column grid system.

Five column system will look like:

<div class="row">

<div class="cell">1</div>
<div class="cell">2</div>
<div class="cell">3</div>
<div class="cell">4</div>
<div class="cell">5</div>

</div>

You can add as many "cells" as you like.

Here is the demo.
Two Lines CSS Framework

How this system works?

By combining display:table and display:table-cell you have the container(.row) and the columns(.cell), any row can contain many cells.

All cells by default are fluid. There is no need of Float and clearing. The width of all cells can be additionally defined. So there are literally endless combination of columns. You can mix px,em,% and fluid colmns.

Example 1

Code explanation:

.row {
display:table; /* The container */
width:960px; /* Any width, you can also use % and ems */
margin:0 auto /* Centered */
}
.cell {
display:table-cell; /* column */
vertical-align:top; /* align to top */
padding-left:10px /* the default gutter, you can personalize your gutter size */
}

Here are also two more examples:

Example 2

Example 3

So you can personalize your main width, columns size, gutter size, you can use %, ems or default fluid width and choose to center or not your main layout . Pretty powerful don’t you think?

Unfortunately this system will not work in IE 6/7 and some older browsers.
You probably noticed the similarities with classical tables coding approach (table, td, tr) and someone will think that this method is trying to reinvent the tables. What changes?

When the CSS is used for styling layouts the main goal is to separate the content from presentation. So in this case we have the CSS who is controlling the content without the use of table tags.

Today we are playing with the new CSS3 "make up" tricks forgetting that the main problem in CSS is the layout and we still don’t have good layout model who will satisfy all our designer needs.

This Framework is just an experiment that can help you understand different CSS layout models and coding approaches.

The code and the examples are also available on GitHub.



About the dollar sign ($) in JavaScript

Friday, October 15, 2010 { 11 Comments }

I’m writing this short post because I think that many people are puzzled by the $ sign in JavaScript. When I started using jQuery I thought that the $ sign have some super powers or do some Voodoo magic.

The truth is the dollar sign is "special" in JavaScript but unfortunately doesn’t do Voodoo magic.

Why the $ sign is special?

Because you can do this: var $ = "Hello World";

But you can’t do this: var £ = "Hello World"; or var @ = "Hello World"; or var # = "Hello World";

The $ sign is "special" because is treated like any normal letter (a,b,c …).

So the $ is cool sign that probably every keyboard have and is perfectly legal to use. Probably because of that John Resig decided to give him special role in JQuery and later the $ sign was implemented by Prototype and MooTools. How jQuery and the other libraries implement the $ is another issue which will not be discussed in this article.

Another characters like the ($) dollar is the underscore (_).

Quote from Standard ECMA-262 ECMAScript Language Specification


7.6 Identifier Names and Identifiers
Identifier Names are tokens that are interpreted according to the grammar given in the “Identifiers” section of chapter 5 of the Unicode standard, with some small modifications. An Identifier is an IdentifierName that is not a ReservedWord (see 7.6.1). The Unicode identifier grammar is based on both normative and informative character categories specified by the Unicode Standard. The characters in the specified categories in version 3.0 of the Unicode standard must be treated as in those categories by all conforming ECMAScript implementations.

This standard specifies specific character additions: The dollar sign ($) and the underscore (_) are permitted anywhere in an IdentifierName.



What other characters(letters) are there?

Recently I discovered that you can use some small Ancient Greek letters Alpha, Beta, Delta and others (α, β, δ) can be used.

So var α = "hello world"; is ok. Unfortunately there is no Alpha (α ) sign on my keyboard.

Potentially this Greek letters can be used to avoid "conflicts" or in some minification tools but that is probably another topic.

Did I missed something?

Update: I was wrong that the the jQuery was first implement the $ sign. But my point was not who was the first or last but the explain that the $ is just like any other letter in JavaScript.



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Name: Vladimir Carrer
vladocar [at] gmail.com
Location: Verona, Italy
I'm a web designer, developer, teacher, speaker, generally web addicted ...

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