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Posted in "html5"


About responsive tables

css3 html5 responsive-design

2013 was the year of responsive design. And 2014 too.

There are many html5/css3 frameworks which provide components, css classes, js libraries etc... that you can use to speed up the process of creating a good and responsive web interface.

There is a sort of vacuum indeed, when dealing with html tables. Do not get me wrong, this is not a fault of the frontend frameworks, but it is an intrinsic problem, due to the nature of tables. The ...

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Geometriko, an enjoyable html5 js game

games html5 javascript

GEOMETRIKO is a skill game, written in html5, css3 and javascript, developed by a friend of mine which captured my attention some days ago'. It's available now in a demo version at this url, give it a chance because it's really an enjoyable game. It can be surely improved in some details, comment here if you have ideas or suggestions that can be useful for the developers.

The game

GEOMETRIKO is a turn–based game played on a 4x4 grid, and features four different tiles, aka Tiers, arranged in ascending order. Each player starts with an infinite number of Tier–1 tiles. Every time a player makes a three–of–a–kind he performs a Trip on the board; once a Trip is made it ...

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The importance of semantics in html documents

html5 semantics webmaster

Wow, the first post of the last year of the world...

In the last weeks I've discovered the importance of the semantics rules applied to the web documents (well, really I knew it before, but I had never given it the importance it has).
The html5 specification introduces some new interesting html elements which plays a leading rule in this sense. Here I speak about some of them since many and many articles may tell you the same story and probably in a better way, look at this for example.

With the older html4 and XHTML the semantic structure of the page was determined essentially by the title tag in the head of the document and by all the h1..h6 tags in the body, which all represents an headline in a descendant order. In particular if you wanted to have a semantic structure with only one external root element you had to use only one h1 element. Then you had to use the others (in descendant order) to create semantics subsections.

The html5 specification introduces some semantic elements which may be used to create more complex semantic structures, and solve some situations that couldn't be managed earlier ...

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Development of undo and redo functionality with canvas

canvas html5 javascript mootools webmaster

Sometimes I like playing with html5 and javascript. Today I was playing around with a sort of paint project for mootools. Clearly I used the html5 canvas element and I wrote some tools (pencil, rectangle, ...) to draw in it.

Well, one of the first problems encountered is the need for a undo/redo functionality. Let's see a way to implement such thing.

Essentially when drawing we can imagine we pass through a series of different states. Each state represents the canvas aspect at that time. Clearly we have a continuous set of states, but it would be to "expensive" to consider and implement this way.

So we may consider a discrete set of states, where a new state is created consequentially to a user action (and not time dependent). Let's consider the creation of a new state consequent to a mousedown-mouseup action of the user, in other words a new state is created when the user draws something in one move.

Now imagine to consider three categories: past, present and future.

The present category includes only the present ...

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