Can I use JavaScript to do the same what Adobe Flash does?_问答_开发者

Is JavaScript capable of doin开发者_运维技巧g the same what Flash does? And if it is the case, can it be a good idea to switch from Adobe Flash to JavaScript?

No, JavaScript cannot do what Flash does. Maybe HTML5 w/ canvas,JavaScript w/ JQuery,CSS3, some Webkits and some SVG/JPG to handle pictures and animations can make an attempt at what Flash was 5-10 years ago.

Video

JavaScript - There is only one implementation I know that slice the video into JPEGs then dram it onto the canvas. No clue what happens if one wanted to stream a file.

<video> tag - Best thing to come along. I would not lie. But this is not JavaScript.

Audio

JavaScript - I remember once it could be used for MIDI files but then it needed compatibility checks based on the browser

<audio> tag - Same reasoning as <video> tag, it is not JavaScript

Animation

These are three places I know making the cream of the crop that can be made with JavaScript.

Mr.Doob's Playground
Spiderman Animation
SmokeScreen Flash to JavaScript

Note well. Do not talk about Apple Demos ... that is a joke and all marketing. They have only optimized for their browser (Safari)

Also do not talk about what Steve did or did not say. He is a pro at marketing. The other steve (Steve Wozniak) is the engineer.

(1) I highly respect because Mr.Doob really pushed that <canvas> and JS . (2) Was great animation that could be accomplished by a teenager in Flash IDE 5 years ago ... way too much effort to make something so simple. (3) Is really good yet you start with the Flash File ^.^

Lines Of Code

In many cases ActionScript, better yet the Flash IDE make animation a breeze with half the lines of codes (or maybe even simple drag and drop on timelines) than JavaScript. Libraries such as JQuery were brought in to try to shorten the amount of code. Even then in most cases less code/implementation was needed in ActionScript.

Accessibility and Performance

This is in the hands of the developer and has nothing to do with the language. Flash is capable of providing deep linking with SWFAddress (Ajax), page resizing (Stage Scale) and so forth. People constantly talk about performance with Flash, yes this is true but this is poor design on the developer for memory management.

Updates

JavaScript will be limited by the <canvas> and other elements to achieve what Flash can do.How ? If issues started to occur in HTML5, what would you do ? Send in a bug request ? No ... you will wait a next 3-5 years for HTML6 specification.

Suggestion

I suggest looking through Mr.Doob's work, Webby Awards and google the best of Flash Websites. Look at them carefully see if you can bring up case studies. Like this one : Creating marketing platforms with Adobe Flex Website under study : http://www.bombaysapphire.com/

And a word to a wise , one of your favorite websites - YouTube, would not have survived if it was not for Flash :D

Hell you can use javascript to "do" flash!! Check this out! Smokescreen

On a serious note, flash has its own advantages. Like e.g. games and some very specialized apps like audio video editing etc. Maybe javascript and HTML5 is not there yet, but its getting close!

Is JavaScript capable of doing the same what Flash does?

No, definitely not. While both share some capabilities, like animations and interactive interfaces, JavaScript's and Flash's design philosophies differ fundamentally, and in terms of features in those fields, Flash is certainly way, way ahead.

And if it is the case, can it be a good idea to switch from Adobe Flash to JavaScript?

It might, depending on what exactly you are doing in Flash. If you outline that in more detail, you will certainly get more concrete answers.

Here's a response to Apple's recent trumpeting of HTML5 - Jump back in time with HTML5. There's still plenty of reasons to use Flash!

The Apple HTML5 demos (left parts) only work with Safari (4.7% of all users on all devices). Some HTML5 features work, others won't work on other browsers. As a matter of fact, HTML5 is not really a standard at all. The Flash TODAY demos (right parts) show how 97% of all websurfers can experience Flash the way it is supposed to be today & tomorrow: fresh & innovative. By the way, these Flash-examples are extremely hard or simply impossible to build with HTML5

Depends on what functionality you are looking for. While javascript has much evolved recently and many frameworks were introduced it cannot be compared to Flash in terms of creating rich web interfaces. I think though that progressively new concepts will be introduced like HTML5, usage of the GPU and HTML + javascript might one day fill the gap.

Javascript is vast. But it cannot replace Flash.! The biggest Advantage of using flash is hiding the source code.. Which in Javascript is nt applicable always.!

Flash is Used in Animation of Cartoons and 3D web sites etc.. Of course u cannot create a front end competing to Flash..

One good solution would be => If you want ur site to hav good programming properties den go for javascript..

If U want ur site to be good in Front end design den go for Flash!! Although flash has its scripting language [Actionscript] its not dat much flexible as javascript!!!!