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HTML 5 - efecte vizuale uimitoare

Se pare ca zilele in care se folosea Photoshop la greu pentru a crea efecte pe paginile HTML incep sa apuna. Java Script impreuna cu HTML 5 ofera posibilitatea de a face efecte vizuale pe care acu 2-3 ani doar le puteam visa.
Hai sa va dau si un exemplu: http://www.nevermindthebullets.com/
Este un site de benzi desenate. Nimic deosebit pana acuma. Dar daca ne uitam in codul HTML o sa observam ca foarte multe efecte vizuale la imagini sunt facute prin intermediul la Java Script.
Cum s-a ajuns la aceasta performanta? S-a inceput de la niste imagini in format PNG, care pot sa fie transparente sau "decupate". Prin acest mecanism se permite suprapunerea de imagini ca si in Photoshop( layer). Fiecare element din imagine este o imagine separata. Dar pe langa atributele normale care le putem gasi pentru tagurile HTML precum img sau p o sa observat niste atribute noi precum: cp:x, cp:ballon sau cp:text. Aceste atribute custom, prefixate cu cp pe care le-a introdus creatorul sitului nu sunt procesate de catre brower deoare nu sunt valide. Dar reprezinta un mod inedit de a pastra meta-date precum pozitie pe o anumita axa, fond type, efectul care sa existe pe tagul respectiv.
<p class="Balloon" cp:text="Little" cp:balloon="Tell" style="left: 74px; top: 35px; width: 280px; position: absolute">
He's come to the west; the land of opportunity.
</p>
<img class="Layer" style="left:-444px; top:-75px" src="soif-2.png" cp:y="100" cp:x="600" />

Dar fiecare din aceste atribute sunt prelucrate de catre Java Script care adauga anumite efecte speciale. Toate aceste efecte speciale le puteti gasii in parallax.js.
Daca vreti sa aflati mai multe puteti sa intrati aici.

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