Why the hype about JavaScript?
● Web Application Distributed Processing
● Face the Server Side Development
Approach
● Improve Web User Experience
● Browsers War's Protagonist
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... but at early stages
was JavaScript a
document.getElementById
based language?
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JavaScript
Designed to be a procedural
programming language!
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Procedural Programming...
simply contain a series of
computational steps to be
carried out.
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JavaScript
... but it also have structs like C
programming language!
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OKAY I'M IMPRESSED.
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BUT WAIT!
JavaScript can also provide a
powerful a OOP programming
environment!
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NOW I'M CONFUSED! ¬¬
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The world needs heroes
to bring JavaScript to "braços da
galera"
JavaScript Structures...
...are also known as JavaScript
Objects, writen in JavaScript
Object Notations (JSON).
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JavaScript Classes...
...are any callable functions.
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Its variables...
... are always a reference to a
memory instantiated object.
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When everything is reference...
... data integrity inside
application can be a little odd.
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As Procedural Programming...
...JavaScript functions have no
maintainer class, no parent
class... nothing but a code
stack!
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Buzzword
CLOSURE
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Closure
NOT JUST A TECHNIQUE, BUT A
GOOD PRACTICE
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Default API
● Window public functions
● Array, String, Boolean, RegExp, Function,
Date, Object...
● Some Browsers specific classes
● DOM Layer 1
● DOM Layer 2
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By default we got no
● Scope namespaces / packages
● No simple class implementations
● No threads
● No event driven architecture
● ... just a low level API to handle browsers'
things.
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Frameworks?
WHEN YOU NEED TO WORK WITH ONE OF THAT
FEATURES, YOU BETTER FIND A FRAMEWORK.
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THE END
JAVASCRIPT BECOME MORE SIMPLER WHEN
YOU KNOW HOW IT WAS DESIGNED.
Autor: Miere Teixeira
E-mail: [email protected] / [email protected]
Twitter: @miere