I have the feeling that Flash-based ( or Silverlight-based) websites are generally frowned upon, except when you are creating games or multimedia-content rich applications. Why this is so?
Flash is infamous for its poor accessibility.
Keyboard navigation does not usually work, and Flash (up until recently) did not have search engine support.
Flash applications does not work in mobile phones and other portable devices.
Flash is not there in the iPhone!!!
Flash is controlled by a single company (Adobe) and so it is not following any well defined standards for the Internet.
The beauty of Internet lies in the fact that you can always view the source code of any website you are in. This way you can use the same programming/design techniques in your website or you can find security flaws in the web application. This is not possible in Flash. In Flash, source code is closed.
The big question is, why should you use Flash "except when you are creating games or multimedia-content rich applications"?
jtyost2 says,
"I would also add that you can't directly link to any content inside of a Flash site, thus breaking one of the major factors that makes the Internet, the Internet, links."
content weight
usability
crawlability of search engine bots
accessibility
ease of use (disputable)
technology encumbrance (added software required to access the site)
security issues (needing to add software comes with issues involved with installing or running that software/player of the content)
[Edit] Why I place usability and ease of use separate is best explained in this link
Usability:
a result – software that is usable;
a process, also called user-centered design, for creating usable software;
a set of techniques, such as contextual observation and usability
testing, used to achieve that result;
or
a philosophy of designing to meet user needs?
Ease of use:
Effective
Efficient
Engaging
Error Tolerant
Easy to Learn
I agree with the comments on that site, but this is all debatable...could be a good stackoverflow question: is usability and ease of use the same? IMO part of usability is ease of use and vice versa, but they are not necessarily the same.
I hope I don't enfuriate the more semantical sensitive with this edit :-)
Interestingly everyone here blasts Flash/Silverlight and you would do well to recognise that this is only one side of the coin.
Flash (and Flex) allow web site designers significantly more flexibility and richer content for their site and this works in a variety of situations - e.g. sites relating to movies, or bands, sites for kids, sites for games etc.
Certainly, there are many reasons to not choose Flash/Flex/Silverlight, but one can do sites just as inaccessible in JavaScript these days. I have previously worked with JavaScript products that have no reasonable usability by blind people, or web crawlers.
Flash penetration (from a biased source to be sure) is 99%+ (http://www.adobe.com/products/player_census/flashplayer/version_penetration.html), which means that those that say "would never visit a Flash site" are in the 1% of the population that do no install Flash, do not watch YouTube or movie trailers online.
So, you need to be mindful of your audience. Certain audiences and situations would definitely be better off with plain HTML pages and a minimum of JavaScript (government websites, programming websites are two areas that spring to mind). Other times it is because the audience are office workers that are not allowed to install Flash in the browsers.
Rich Internet Applications (RIA) is one area where there is a distinct clash/struggle between the Flex/Silverlight and JavaScript/CSS/HTML sides. I've worked with both, and I'm now of the opinion that requiring Flex/Silverlight plug-ins is fairly reasonable, though you can still lose some visitors if the application is public.
In summary - you're best to identify your audience, identify what they're willing/able to use and then based on such limitations decide on your technology.
Flash and Silverlight based sites typically go against basic Internet conventions with their closed models.
For example, most Flash & Silverlight based sites:
Ignore the back/fwd button.
Don't allow you to send anyone a URL to a specific place on the site, or bookmark a specific spot for later via your browser
Place the internet in a fixed size box. No dynamic sizing for wider monitors or higher resolutions.
"I was about to click checkout but I wanted to change something so I hit the back button"
In this next rant s/Flash/Flash or Silverlight/g
The Flash application/plugin is a closed source pot of serious undisclosed security holes that expose private data, allow modification of arbitrary files on your hard disk, etc.
Flash files are enormous for basic content. There are more efficient ways of doing things
Flash is slow. The plugin on my Windows PC can hog 100% of the CPU time to play some shitty websites.
Flash is non-standard. There isn't a supported flash plugin installed everywhere. Linux users can't run it without jumping through package management hoops. Firefox users on Windows don't get it by default (well didn't last I checked).
Flash is annoying; your users don't want to be bombarded by animations and jingles and junk just to get some basic information.
No back/forward functions unless the Flash designer wanted to implement them in
Can't view a single page without waiting for all the content/scripts that make up that "page" to load. That's really quite painful if all your user wants is a slice of text and you force the multimedia down their throat.
Most Flash-only sites are really bad; the designers seem more concerned with using all of the features of the flash engine rather than presenting something that's concise and useful to the user.
I am a Flash developer. The firm I work for has no difficulty finding clients who want us to build Flash-based products for them. There is a certain set of applications which it is much easier to develop in Flash than in other environments I have used.
But Flash has its problems. Some above have complained that Flash apps do not include keyboard support. Others say it is because the developers are too lazy to implement it. The truth is that many of the components that come standard with Flash are buggy. At my firm we have had to write our own replacements. One feature that is problematic is keyboard support. I implemented my own support for keyboard interaction. It works well, but required effort. If I were writing a Windows VB app, the keyboard navigation would be provided and would work well out of the box.
The same is true for deep-linking, back-button support, etc. A clever developer will be able to make a Flash app behave well. Some open source libraries are indispensable here.
As for flowing layouts, I just completed a proof-of-concept for this (in AS3) as well. It is possible, but requires much effort. Why do I make the effort? Because of the other things that Flash does well.
My biggest gripe with Flash is that it takes you "out of the browser" into its own totally separate application. This breaks "browser standards" - i.e. the functions I can do in my browser:
Right click
Middle click (for opening links in other tabs)
Selecting text
Copy & paste
Printing
Keyboard shortcuts (since Flash steals keyboard focus)
Back/Forward buttons and the whole "page" concept
Javascript interaction with other elements on the page (I don't think this is possible).
"Inspect element" in Firebug or Chrome, if I wanted to see the source of a particular part of the Flash file, or find the image being used.
Flash has its uses. It's good for content, not webpages.
Printing is often poorly supported and the backbutton does not work.
I think it's a matter of selecting the lowest cost medium to reach your target audience,
be it Flash or Silverlight or JavaScript or plain text.
You can have text-only, JavaScript-only, etc. versions of your site if you have the
money, and your target audience come with different prioritizes.
So my question to you would be: does your website has people who frown on Flash as its target audience? If yes, you need to stay away from it. If not, use anything to give your
visitors a good experience.
SEO is the prime issue. Still Flash is not crawlable. But Adobe is working on it.http://www.adobe.com/devnet/flashplayer/articles/swf_searchability.html for better swf indexing.
Does anybody know a site called YouTube? It wouldn't exist without flash. Flash has great video/multimedia capabilities that simply cannot be ignored.
Flash is amazing when used in the proper way, in appropriate circumstances and when the designer/coder has taken care to embed basic accessibility features.
The thing is, like all good things, there's a lot of abusive use (flashturbation). Especially in the beginning, when people just want to slap Flash wherever they can just to show off.
But I strongly disagree that Flash sites are bad: When made properly, and with good UI design and accessibility, they bring a whole new dimension to the web.
See Steve Jobs' Thoughts on Flash: http://www.apple.com/hotnews/thoughts-on-flash/
Let us not forget that Flash allows web sites to display video, animation, user interaction, etc., and it allows this to be a simple process or a geeky techie one, depending on what you want to do. Many bad Flash sites are down to the author.
If YOU don't like Flash then the answer is simple, don't use it. Don't install the Flash plug-in, or install a browser plug-in such as Flashblock on Firefox. This replaces any Flash movie with a play button, preventing and download until it is clicked.
Better than that though, if you don't like the solution that Adobe or Microsoft are giving you, then come up with a better one, or at least let them know what you don't like, they do take feedback seriously. Support some of the people who campaign for accessibility improvements in Flash, for example visit http://niquimerret.com.
Accessibility is an ongoing issue and not one that will go away, Flash accessibility is improving for people with physical disabilities. In in some cases the use of Flash enhances the experience for people with cognitive and learning disabilities, when an concept or idea is better explained when presented as an animation rather than a page of words and static images.
Flash adds another heavyweight component that's required to properly view a web page. The flash plugins are often buggy and can crash a browser. Flash pages often are used to make cutesy animations and other things that make it harder to quickly navigate a site.
All of the above is true for the wild wild web.
However, for internal business applications, Flash and Silverlight allow the user to have something close to a fully-fledged application in their browser. Accessibility, SEO, and closed source are not very important in an internal application. All that matters is making the user's life easier.
I dislike Flash based websites because what happens if your browser crash or your connection dies for a bit? You have to load it again and go back to the menu, and select the item you wanted to read about, and so on and so forth.
Just don't do it. :S
I don't install Flash on my browsers, mainly to escape the nuisance of animated ads, but also for all the security and privacy reasons mentioned by others.
So sites done completely in Flash are nonexistent as far as I'm concerned. (W.r.t. Youtube, I download videos directly into Miro.)
Probably for the same reason C programmers shied away from Win32 API, Win32 programmers from MFC and MFC programmers from Windows Forms. It's tricky to use and understand - I have tried programming in Flex and am getting along pretty well but it is not inherently designed for typical web application design e.g. there is no native (at least until Flex 3) support for databases or cookies or sessions - you need to put all 3 in PHP or another server-side page and call that from ActionScript.
Try making a simple register/login page with PHP and then again with Flex/Flash and you will see that all the server side crunching is done by someone else - again, this is probably by design since we have HTML/JavaScript for the front-end mixed with ColdFusion or PHP etc. for back-end in "traditional" web applications.
Like started by other people, Flash is bad with the keyboard - try pressing Ctrl-T in Firefox when a Flash object embedded in an HTML page has focus (mouse-over) - so that can be frustrating for the user...
Having said all that, I would still rather make a web application front-end in Flash/Flex than HTML/JavaScript/CSS since the latter needs a sharp learning curve that gets quite bewildering after a while since you have to account for the "good" design aspects of CSS and JavaScript and the bad ones too - and also the peccadilloes that JavaScript/CSS inherently have and those which are introduced by the JavaScript library vendor (Yahoo's YUI, Google's Ajax API, script.aculo.us, etc.
If you are already a web programmer who knows CSS/HTML/JavaScript very well and have a good development environment set up on your PC with all required code inspectors and runtime debuggers etc. etc. then it's easy to keep on working in that (not taking into account end-user preferences) but if you are like me and want to make a web application ready and available for use quickly and want to add features to it quickly while making it pretty all the time, then Flash/Flex is a better option, IMHO.
I am a Flash developer.. and I have found that although Flash requires more effort in coding, the potential is enormous. You can create very simple sites with simple transitions, so subtle it would seem to be a normal HTML page, while still being just as light.
At the same time, you can use OOP with ActionScript to create a website that is as complex and as inclusive, as well as feels and acts like a desktop application. WHILE ALSO REMAINING VERY LIGHT! (only the content required is loaded on demand, as apposed to 4 column HTML sites with far too much information.)
Nowadays, and this is still without migrating to ActionScript 3, but still using ActionScript 2, MY flash files contain simply 2 or 3 lines of ActionScript, only one frame, and an empty stage. Everything else is dynamically created or added at runtime.
Flash's problems are not about Flash, but about lazy development.
In its defence, most of the issues raised here about how people have implemented Flash in their websites, not about Flash itself. Flash does support accessibility it's just that most people don't consider it when building their sites. Flash does work on mobile phones - it's Flash Lite, although the ActionScript is limited in earlier versions.
Why should anyone have an automatic right to view the source code of a website?
A web author has spent time and effort dreaming up their code to share their ideas through the medium of the web. If you want to know how something works, why not put a bit of effort in yourself, and work it out? The beauty of the web is the message, not the medium.
So what if Flash is owned by a single company - Adobe bought it for a reason, and that's because it's a fantastic bit of kit. The problem comes from web authors not using it properly, trying to make it do things it was never intended to, or simply not applying standards to their sites when developing using Flash.
What is so evil about a Flash based website? Absolutely nothing.
It's like asking what is so evil about a gun. Nothing. It's the idiot wielding it that has the problem.
Flash sucks and I refuse to visit Flash-based web sites. Why? Because I can't. Why? Because Adobe is too ignorant to write a plugin for a 64-bit browser.
Look at any major car maker's website, they are ALL in Flash. It depends on what you are doing. If your goal is to provide a rich, sexy website Flash/Silverlight will give you a huge advantage in terms of development time. IF you are providing content/data HTML and JavaScript (jQuery for example) can give you a lot of whizbang without requiring additional software plug-ins (Flash/Silverlight).
Flash Player is the culprit behind more Mac OS X crashes than anything else. It's not exactly well-known for its stability.
All the above answers are focusing on Flash, Silverlight is just as bad or worse. If you are running Firefox with NoScript (you should be) then you have to click on every script that you wish to allow to run.
So build your websites with scripts, Flash and Silverlight. Just make sure that they still work with them disabled. Many of us will simply move on when we open a site and see nothing.
Many of us have had bad experiences with Flash based websites which has propagated the idea that flash is "evil". I don't really think it's fair to apply the label of evil to any technology or framework, they are each designed to cater to specific scenarios and many of them do well in those scenarios, for example, I have no problem with websites that use flash video.
A few other responses have touched on the fact that the use of flash contradicts many of the standard metaphors we use on the internet (e.g. links and navigation buttons), I hate this as much as the next web user but this doesn't really make flash evil either.
While it has been said that there are mechanisms within Flash/Flex to add support for these things, in my experience these are rarely implemented, which is not directly the fault of Flash per se, but is very annoying for the user.
Perhaps the evil is not Flash/Flex but Adobe for not making many of these things easier or more visible to developers.
For the record I have never developed in Flash
Flash isn't evil, it's what people do with it that's evil.
For goofy vector animations and maybe even for example a 360 product view or interactive diagram, yes. Flash can do beautiful Full HD animation on my ancient box # 60 fps using ~15 % cpu.
For web video, if you have no other choice, I suppose.
But for entire websites and these things called 'RIA's, no.
So shockingly a technology works better for the thing that it was designed to do.
Flash is one more stuff to learn in web development. No thanks!
There are just too many already. If I can do my job without it, I don't need it.
Programming is being paid less every day.
Related
I was wondering that if I want to make apps for both iOS as well as Android is it worth it to get into learning the whole HTML-CSS-JavaScript route or should I learn their native SDKs?
Exactly how much will HTML5 be the future I guess Im wondering. Is it going to really replace the native mobile app?
I know noone has a crystal ball but Im just seeking input from more experienced/or more senior developers.
Much appreciated.
The reality is that HTML5 will never be a realistic replacement for native applications built in iOS and Android, as it is not powerful or robust enough to do so. Additionally, using HTML5 will only work for you if you intend to create very simple apps. Even then, you will run into problems.
Consider for example the Table view in iOS. It can be highly optimized for speed and interaction in a way that will always surpass a third-party, remote solution such as HTML5. Note that the table view is one of the simplest things you will do when creating an iOS app.
Additionally, knowing Java (Android) and Objective-C (iOS) will be beneficial to you in the long run in terms of your development career.
There is one real exception: if your app is going to be the native representation of a web app (ie. Facebook) then it does in fact make sense to go with a largely web approach (HTML5/Javascript/CSS). In fact, that is exactly what Facebook did. However, even Facebook experienced a very buggy and crash-prone existence on mobile devices for the better part of a year.
In conclusion, I know of no application developer who seriously considers HTML5 as a contender for the building of mobile applications (other than for heavily web-based apps with web-like functionality). The dream, of course, is that HTML5 will be a "silver bullet" or a "golden hammer" for developers, ushering in a brave new age in which we are able to focus on learning one set of technologies for all sorts of devices. Unfortunately, it is merely a dream. At least for now.
I have developed a casual game that has become a modest hit on a few flash gaming sites and
I'm weighing the pros and cons of adding it to facebook. I don't have a strong coding background - I learned AS3 as I was developing the game- so I'm not sure if embedding a flash file is a good idea for facebook games. If I want to eventually enable in-app purchases, are there any reasons I might not want to use Flash? Does Flash make the game more susceptible to cheating? Are there any other reasons that I might want to go with HTML5 or another coding language?
HTM5 isn't a coding language, but JavaScript is used for programming the HTML5 Canvas element, which is what your consideration would be.
There are a lot of Canvas vs. Flash posts on the internet and I suggest you search for them and read them. There's no reason for me to reiterate what's been said a hundred times.
There isn't anything wrong with embedding Flash on Facebook, though the usual iOS crowd won't be able to see it.
Personally I'd recommend learning Canvas, which is a lot lower level than Flash but totally doable. The future of flash is probably going to get a lot smaller, and you're already boxing out at least one demographic (iPad/Phone/Pod/iOS) by using it.
So the bottom line is that Flash is easier, at least for now, but HTML5 Canvas is the future here.
There are a number of Canvas books that cover simple game development and there are already several libraries that make game creation easier (ImpactJS, Game Closure, etc. I'd suggest searching and taking a good look at the currently most popular ones)
If you already actually have the game all coded up and working in AS3, it's pretty much a waste of time to switch it over to another language. A lot of Facebook games are Flash, and if you want to target iOS you can always package it as an AIR app.
For future projects though, I'd agree that taking a look at HTML5 technologies would be prudent.
I want to make a site from scratch, and Im considering to use Flex to make a R.I.A instead of the standard approach (xhtml + css + some ajax).
The kind of site I want to make is something like e-bay, but less complicated.
But.. I know that 95%+ of the sites like that are built in the previous mentioned techs... so, what are the cons and pros if I want to make a pure Flex site?
Thx.
If you write an entire website in Flash, the entire website lives at one URL. (Short of mucking around with whatever Flash provides to let you offer deeper links.)
Whereas a website written in HTML, unless you go mad with your AJAX, lets people link to the stuff they’re actually interested in, like unicorns:
http://cgi.ebay.co.uk/DESPICABLE-ME-AGNES-Unicorn-Doll-Plush-Character-Doll-/180602861597?pt=LH_DefaultDomain_0&hash=item2a0cc4f81d#ht_1755wt_907
Or for a non-eBay example, Stack Overflow questions:
Flash for business web applications - why not?
HTML also has a pretty standard and understood user interface: links, and form controls. (Mainly links.)
Flash doesn't work on iPhone/iPad. End of story.
Other reasons: not a web standard, often quite slow, not good for SEO, etc.
It requires users to have a proprietary plugin which some users don't want and other users can't have (since isn't available for all platforms (iOS being a key example)).
It also has performance and stability issues on some platforms (OS X and Linux being prime candidates).
While some search engines have started to index Flash content (so long as it exposes the information), the results aren't as good as for content rich HTML sites.
You can do that simply using traditional xhtml + css + jQuery (or any JS framework if you want to increase UX). Flex won't do much in your scenario.
In my experience, performance is not a real issue unless you play video - one can write bad programs in JavaScript, too...
Your pros are mostly on the development side: You can have a great looking site quickly, and you can almost completely forget about browser incompatibilites.
You rely on the customers having the plugin installed, though, and you rely on Adobe's technology for development and playing of the content.
If this is not important to you, and you can afford to do without all iPhone and iPad users, accessibility and standards compliance... go for it!
Flex is good if you want to install as an application using Air. ebay actually has a RIA version, or at least they did for a while.
There are several concerns with a Flash site, some of which Adobe has addressed in the last couple of years.
One is accessibility. It is more difficult to make a Flash site accessible to the visually impaired, who use screenreaders.
Related, people like to be able to copy and paste content, as well as print. With standard web pages, the developer need do nothing to support this, it just works from the browser. With Flash, you'll have to take care to make your text content selectable, and I'm not sure a user could ever select a section of text + images. I've never done it, but I can only imagine that implementing printing ability in your Flash site would be nightmarish, at best.
Another is linking and addressability. For most sites, you can copy or at least get a link that you can share or save to get back to where you want to be. With Flash, you usually go to a single address and then the rest of of your experience happens inside the Flash "window" and the browser isn't actually navigating any pages. It is far more difficult to implement this ability in a Flash site.
A Flash site is usually very slow to load, especially the first time, and page load times are immeasurably important to a site's success.
Finally, you've perhaps heard the furor over the last couple of years about different vendors supporting or not supporting Flash in their products/devices. An all-flash site would be completely inaccessible on any iPhone or iPad, for example, which do not support Flash at all. Furthermore, some employers do not allow plugins like Flash to be installed on work machines, so you'd eliminate that portion of possible traffic, as well.
Nobody has yet mentioned Silverlight.?
I mostly agree with Jay's answer concerning accessibility, but as a further note would like to add that development in Flex/Flash vs HTML/CSS/JS could be more costly not only in terms of money but also for maintenance. Many Flex/Flash devs typically charge a higher price and their dev tools, which are necessary for compilation, usually aren't free, compared to HTML/CSS/JS devs, who often use freely available text editors.
Why HTML/JavaScript/CSS are not becoming compiled languages (or maybe even merge into a single compiled language)? What if browsers were running "Browser Virtual Machine" and html/javascript/css sources could by compiled to a "browser bytecode". Wouldn't it help developers and users a lot?
I can see a few challenges:
What to do with zillions of existing pages? Make this compilation optional, so if you want you can use plain old html. If you want to feed a browser with a compiled page just use .chtml for example.
How search providers would index pages? Make a decompiler that would decompile bytecode into exact original sources (for example like flash can be decompiled). Or search providers can use the same virtual machine and get data they need from there.
How to make it compatible with all browsers? Have one centralized developer (lets say w3c) to develop this virtual machine and then each browser would embed it.
But what about benefits:
Speed.
Size.
No more "loose" and "half-correct" html. It is either correct or won't compile.
Looks the same in every (supported) browser.
If not a bytecode then at least have some native compression going on, html probably is not the most efficient way of data storing. I know there is gzip but why to compress pages every time on a server and decompress in a browser if we can compress it once and feed it to a browser?
So what stops us from taking this road (well, besides a huge amount of effort to make it all happen)?
Ah, but Javascript IS becoming a compiled language. Check out Firefox 3.5 with TraceMonkey. It's insanely fast compared to um you-know-who's browser. It's true that JS will never be C, but it's a much more dynamic language than C is, and in many ways that makes it more expressive and powerful.
As far as HTML goes, I don't think that the lack of validity of HTML is a huge detriment to speed. I think the engines that put together the visual representation and manipulate the DOM need to get a lot better (um, IE, I'm looking in your general direction...). CSS compliance needs to get better, and CSS itself needs to get more powerful. (Get on the bus with CSS 3 people!)
But I do think that speed is going to get better on Firefox and Chrome to such an extent that people really ARE going to start using it for mainstream application development. It's funny. Adobe seems to be selling Flash as their platform for dynamic web content, MSFT is selling Silverlight for dynamic web content, and Google just wants to really improve HTML and Javascript to display dynamic web content. And Google's doing pretty well at it so far, I must say...
Your ideas have validity when they are applied to JavaScript. As others have noted, to one degree or another several vendors are trying to apply those principles to JS even now. Another big step in this area will likely be the Chrome OS Google has announced. However, when it comes to (X)HTML and CSS I think your ideas may be missing the point.
The world wide web is not a buggy and inconsistent application platform but a massive and unprecedented collection of interconnected documents. The power of the web is in the abstraction of the data from the often rigid (and breakable) visual layouts and increasingly complex in-page functionality largely provided via JavaScript. Encoding these pages in (X)HTML is ideal for making them accessible to the widest possible audience both in terms of browsers and in terms of technical knowledge required to author a page.
More and more the web is being used as an application platform - which is a powerful and exciting use of this technology - but we cannot lose sight of the fact that these Ajax-driven "web 2.0" apps are merely documents with extended functionality. Compilation doesn't make sense for a document and compression is already happening (via gzip and the like).
On a more practical note, the W3C moves at a glacier's pace and browser vendors take turns between jumping-the-gun supporting experimental features in unfinished specs and taking their sweet time supporting other specs which have been on the table and in common usage for years. The whole processes is like herding cats. I wouldn't hold my breath for them to make the kind of radical changes you're proposing any time soon.
Since HTML and CSS aren't code they can't be compiled. Google Chrome's V8 engine does actually convert JS into byte code, expect other rendering engines to follow suit!
http://code.google.com/apis/v8/design.html
We recently reworked a php template system I've helped create to use minify to compress multiple JS and CSS into one file each, seeing our file sizes drop to about 20% of the origial combined sizes. Minify also does gzip and caching so it's really amazing for speeding up websites.
http://code.google.com/p/minify/
In short you can't compile non-code, which HTML and CSS are. JS can be compiled and is starting to be, but all depends on what browsers feel like doing.
Browsers just need to be on the ball regarding supporting web standards. The more browsers do this, the less headache us web developers have. I was quite happy with YouTube's very public drop of support for IE6. We need more action like that for the web to move forward.
The V8 javascript engine (also embedded in Google Chrome, but it's open-source and liberally licensed so you're welcome to use it in the next browser you write!) does compile Javascript to native machine code -- of course, it does it "just in time" (like most modern compilers -- Java, C#, etc!), not "ahead of time" (like Fortran did in 1954 when computers were just too weak to handle compilation in the midst of execution). I'd be surprised if other good JS engines, like those in the very latest Firefox and Safari, didn't do the same.
Looks like you're not advocating "javascript as a compiled language" (since it obviously already IS compiled, if you're using a good JS engine), but rather "ahead-of-time" compilation for it (just when most modern languages are essentially abandoning ahead-of-time compilation). Pushing machine code rather than compilable code down the wire sounds like a mostly horrible idea -- much larger size, difficulties in supporting one CPU vs another, security nightmares in properly sandboxing it, etc, etc) with not much in term of compensating benefits.
That said, if you're really keen on pushing machine code to the client, try out nativeclient (as long as the client is an x86 machine - forget every smart phone on the planet, many netbooks, good old macs, etc) -- at least it promises a fix to the security nightmares. If and when you're happy with nativeclient, transforming a just-in-time compiler into an ahead-of-time one is a far easier technical challenge (if you want to keep using Javascript for the sources rather than other languages, of course).
See here for a previous discussion on the matter
Not all of the reasons given are necessarily valid, but one important one is that, unless you're Google, server-side CPU cycles are a lot more valuable than client-side cycles: so it's easier to have the client compile/optimize what is quite often dynamically generated HTML/JavaScript, rather than the server.
Ken
Speed.
You're assuming that it takes significant time to parse HTML. However it might be that that time is insignificant compared to the time required for something else, e.g. the time required to layout the text on the end-user's window.
No more "loose" and "half-correct" html. It is either correct or won't compile.
You already get that, using [X]HTML.
Looks the same in every (supported) browser.
You seem to be saying that there should only be one browser, or that all browsers would support it equally.
Internet standards don't happen by having a single body (the w3c) implementing something and declaring it a standard. Instead, internet standards happen by having multiple independent bodies creating multiple implementations. A consequence is:
Some people have developed something that isn't standard yet (i.e. they're ahead of the standard)
Some people haven't yet developed something that is standard (i.e. they're behind of the standard)
I think your idea is sound, however there's still no way to enforce a standard. Thus if there was a non-supported feature, there's a good chance the entire page would simply not display anything. In the current setup, critical information can still be passed.
Google V8, which is one of many new-generation javascript engines 'compiles' javascript into pseudocode, much like .NET 'compiles' c# on the fly. Nothing magical here. Expect more of it esp. as webapps get heavier and more demanding
HTML
HTML is pretty much XML. DTD'd exist for various versions and developers can check against that at any time.
CSS
CSS is not a programming language, however I do agree that "compiled" CSS could work seeing as compilation would compress it. However with the support that CSS has and with the number of essential hacks any CSS needs to have, you'd never manage to compile it without errors.
JS
As others have mentioned, JS IS becoming a compiled language except the browser compiles it for you and not you yourself.
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My website will be basically selling services; will my SEO ranking still be affected if I embed the Flash site in a blank html page? I am at that critical point where I am ready to upload the site but I am just having second thoughts about the ease of doing business with Flash.
Ignoring the SEO implications of an all-Flash site, unless you're building games, or I have an extremely strong desire to buy what you're selling, I will turn back immediately if I find a website built entirely out of Flash.
Nothing against your programming skill; I just have rarely seen such a site give me what I want. The name is often apropos.
Search engine crawlers can't crawl flash sites, so your SEO rankings will be based off the non-flash part (the blank html page). Personally, I also don't really like the user experience of a flash-only site.
Google and Yahoo! have added flash crawling functionality to their engines recently.
http://www.adobe.com/devnet/flashplayer/articles/swf_searchability.html
From a SEO perspective you're fine on that front. Still..your page will need a DOC TYPE, Page Title, etc to remain SEO compliant.
IF your target market is users browsing your site from a laptop or desktop you should be fine. You may want to include a flash-free option for users accessing your site on a mobile phone or with javascript/flash disabled.
For example, You can run a browser sniffer to redirect any user agents accessing the page on Safari via an iPhone OS.
Other than that Flash does offer some nice flair to a site. If you can give alternatives to users that don't like the application then I say do it.
It can certainly be done well. I've seen some pretty cool Flash-powered stuff being run by some pretty big-name companies, do a search for HP's Photosmart page for instance.
Look: there's a lot of information out there about Flash and SEO, and much of it is out of date. Google rolled out "official" flash support about a year ago, and they've been refining it ever since. Google will index your Flash site, but exactly what gets indexed is a bit of a black box so it always helps to have HTML alt-copy.
Never, ever build a full-flash website without using SWFObject for embeds and always try to use SWFAddress to enable Flash Deep-linking. There are ways to make this work and work well - a lot of people don't know that and have a deep-seated hatred of all things Flash because they were irritated by Splash pages in 2002. There's nothing to be done about them.
But if you want to use Flash, go for it - just do a lot of homework and test your work.
Whether or not it's business suicide depends on how much of your revenue is dependent on getting referrals from search engines. Your search engine ranking will certainly be affected if you have an HTML page in which you simply embed some flash.
Could you implement an alternative more static site, by scraping the main content from your flash?
all web applications should be made from the point of view of accessibility, no matter what the scripting language used at the time. If you use a nice script like SWFObject then you can populate your page with "alternative content" to the flash page which the search engines will crawl. this will also allow any browser that doesnt have flash to have a look at the website, even if you dont make the whole thing as "pretty" in HTML.
two birds as they say.
I don't know whether you've considered this or not, or whether it applies to your circumstances, but you might lose out on business from the visually impaired. Unless I'm mistaken, I don't think there are any screen readers that operate on Flash.
I think it depends on what kind of business we are talking about.
For most, I would say don't do it!
But there are ome kinds of sites where I think it is appropriate, if done very well. For example if you are in the business of art or design, or are showcasing a product/service where art or design is key.
As an example:
Volkswagon's GTI Project (a large part of what cars are about is design)
Flash has fallen out of favour the last few years with a lot of people. Initially it was because search engines didn't crawl it but these days it's mainly because 'flashy' effects can be done with javascript engines like jquery, scriptaculous or mootools.
Having said that I can tell you that nearly every business customer I go to still wants flash on their site and most casual web users don't give two hoots what a site is built like as long as it works, is fast (something kinda tricky to do with flash) and is what they want to look at.
I say go for it and see how the site does! I'm sure if you use analytics for a few weeks you will know whether your site is doing well or not.
Best of luck with it :)
For some reason Motorola made their new Droid site all in Flash.
This is a good article about how dreadful it is, and the drawbacks:
newmedia article
There are a ton of good reasons to use Flash sparingly. It's good for what it does well and dreadful for entire sites.
Ok so first of all, perspective, my primary domain is Flash and system architecture, I and the company that I work for at present are all about creating online 'digital experiences', engaging online content.
This is NOT applicable to selling services, e-commerce, and general information based sites, as much as it pains me to say that. There is current a massive backlash against flash due to the arrival of javascript effects and the canvas tag, I'm going to be bold here and say that anyone who thinks they can replace x years of plugin development and and media experience by giving html/javascript devs a div they can draw into are simply misguided (and you can show me all the chrome experiments you want but its still not going to be pixel bender or native 3D support).
So with that said, in this climate you've got to play to each formats strengths, you want slick, stylised SEO'd content that is accessible and concise, html with progressively enhanced javascript is a no brainer. You want a web app that people can use easily, search and build a micro-community around then googles GWT (other js frameworks are available) is the way to go. For everything in-between and beyond theres Flash.
I'm not giving Flash a kicking (it's my lively-hood after all), far from it, in fact I'm actively encouraging people to use Flash only for the kind a digital master-pieces it was made for, if you can do it in HTML, why would you do it in Flash? Sure in most cases it actually works out lighter than JS, and it's cross-browser compatible, but these are small issues that will only be ironed out in time, HTML was designed for the web, Flash was designed as a plugin.
In coming years we will see Flash on a multitude of devices with the open-screen project and the iphone-flash cross compiling, it is becoming a platform for multimedia development in general, where-as the web is becoming more service orientated platform, web apps running off searchable indexed content in the cloud. If your website is intended for the web, then make it for the web.
(Just realised that this was a bit of a rant, apologies)
If you created a web site with Flash, user will not be able to use basic browser functions and extensions such as searching, spell checking, sharing a particular page via Twitter, etc.... (And cannot access from iPhone.)
Depends on the site in question. If its just displaying marketing collateral or case-studies then a "flashy display" would be fine. Have seen couple of such websites in the past and the better ones have impressed me.
You should also consider how frequently content would change and how it impacts your design in Flash vs say design in html. The search engine ranking aspect also will matter.
You won't get any business from me.
Nothing says 'amateur' on the web like pointless Flash.