It's the app that should compile all the code to run in the target environment if needed. This is what we've done in the new Polymer CLI / polymer-build: we compile all dependencies but only if necessary.

That's debatable, particularly when you factor in bugs. However, even if they did, it seems unwise to assume that all relevant users for all or even most projects will be on the latest evergreen browsers. Several large groups, including business users on IE and mobile users on slightly older devices, probably won't be.

I know there's a certain type of web developer who would love for everyone to have updated their browser within the last five minutes so all the new toys are available universally, but that has never been the nature of web development. Deliberately breaking major infrastructure is just going to make JS development even more screwed up than it already is.

Which leads me to wonder: are developers that are so willing to advocate breaking compatibility with older browsers actually deploying real sites that have normal representative user audiences? Or is this an insular group of developers mostly making things for each other?

So while there's still likely an insular group at play, it's not limited to just developers.

IE11 is a different case entirely, though. Almost everything still gets significant traffic on that platform, and in the business world supporting it is pretty much essential. Not much ES6 support there, though.

Still though, it's hard to adopt a policy that axes even just 1% of your customer base just for the sake of easier development cycles when alternate options exist.

Then, I don't understand the rest of the argument. Open Source software has simply won in the marketplace, mostly because of it's openness, rarely because of it's price.

Example: Operating Systems, which is the rare beast where an actual closed-source competitor still exists. Yet the Windows marketshare on the server is around 10%, and I doubt that it's the price that encourages all those Unicorns to chose Linux. Databases are a similar story.

> Neither of these necessarily implies writing or maintaining ideal tools to support web development more widely

It doesn't necessarily do that, but in the case of Google specifically, it does: they need the open web as a platform to compete against the "walled gardens" of Apple and Facebook. Their interests happen to be aligned with those of web developers, which is why Chrome has revitalised browser competition, easily beating the laser-focused team at Mozilla.

> Unfortunately, because so much of the influence is now concentrated with so few organisations or even individual people

The influence is spread out far wider today than it was at the time where Microsoft and Flash were able write APIs without asking anybody.

But, more importantly, I'm unsure what you want? A version of React that supports IE 6 and lynx? They have that, it's called XHTML 1.0 Transitional.

You might like to take a look at the history of Babel (formerly 6to5) as one prominent counter-example. For several years, much of the web development community has been relying on a great tool that was originally written by one talented young amateur.

Open Source software has simply won in the marketplace, mostly because of it's openness, rarely because of it's price.

Chrome being prominently advertised every time anyone visited a Google site using another browser probably didn't hurt. Being installed by default on the most popular mobile OS also didn't hurt. If openness were all it took, Firefox would surely still be a more prominent player.

It doesn't necessarily do that, but in the case of Google specifically, it does: they need the open web as a platform to compete against the "walled gardens" of Apple and Facebook.

Google wants people to use the Web because it makes its money primarily from advertising on web sites. It is in Google's direct financial interest to support the part of the Web ecosystem that in turn supports advertising. That typically doesn't include, for example, corporate intranets, or embedded UIs in network-connected devices, or academic sites, which are three big areas where web technologies are widely used but stability and long-lasting content are more highly valued.

Their interests happen to be aligned with those of web developers, which is why Chrome has revitalised browser competition

Writing as a professional web developer who often works in those other areas I mentioned, Chrome hasn't revitalised browser competition. On the contrary, it's become the new IE from the old browser wars. A lot of the new functionality only works properly in Chrome, and often it's not reliable even there because of the frequent updates that change behaviour and/or introduce regressions. There's no real concern about proper standardisation or compatibility or longevity any more.

But, more importantly, I'm unsure what you want?

I want the fundamental tools on which much of the ecosystem now relies not to break everything that predates a standard that is less than two years old and still not fully supported across many active browsers. In this case, that means being able to install packages from NPM with a reasonable expectation that they will not require a substantial extra build process to be used.

Obviously no-one contributing NPM packages has any obligation to respect that. It's not as if we're all paying for their openly licensed work. I just think the community as a whole will otherwise suffer yet more overheads getting infrastructure set up instead of actually getting useful work done.

If there's no Good chosen, then it all gets crufty and full of tech debt. So someone else thinks they can do better, and starts developing a replacement. In order to get traction, though, they need to make it Free and develop it Fast, so after a while they start taking a few short-cuts, and round we go again.

I have faith that it'll settle down eventually, but until then...

But how does that apply to Chrome, or React? Is there any indication that Chrome carries more technical debt than, say IE7? Similarly, in what way does Facebook need people to adopt React, and would that matter enough to accept such compromises? Is there any indication that their code quality is inferior to <pick whatever commercial js library you want>?

And if this is the complaint about churn, that, at this time would be older than our js stack if it were true: React came out in 2013, it's four years old. Before that, most people probably used JQuery, which came out in 2006, i. e. 11 years ago. Is learning a new library every five years too much, considering this is one of the most dynamically evolving ecosystems of technology?

To extend it further, this is why you should be very careful who you give credit to in the JavaScript ecosystem. If you're trying to build anything robust and potentially long-lived, relying on anything but the largest and most established dependencies is usually unwise, and even then relying on any any aspect that isn't in mainstream use is a risk.

Now, I'll admit, I've dev'd against React and deployed with preact-compat as a build sub for size... but a couple times back to React for broader support, and it really didn't save on speed anyway.

React is hands down the first web tech I've used (out of dozens of platforms and toolkits over the years) that just made sense. Not everything I agree with, and would love some adjustments. All the same, more often than not, it does what I expect, and I definitely can't say that of most of the rest.

As to jQuery, I think it's a great idea, was and still is in a lot of ways. I do wish they'd just drop their XHR, and Promise implementation at this point... but the selection library + eventing is cool and easier to grasp to this day, despite going without it for about 2 years now. There are cases where it was just nice, and still is.

I'm actually fine with JSX, imho it's better having some XML in my JS than it ever was having weird DSL in templates in JS.

Recently, I updated the browser support docs for my employer, and was surprised to note that IE11 is now the oldest browser with standard vendor support, so everybody on older versions of IE is either working for a company with specific extended support contracts with Microsoft, or they are running with no support at all.

Make sure to state "For security reasons" policies always have that even when it's not true, or bad security, because most people don't question it.

Sure, google.com probably needs to support IE 6. For my own business, I'm not willing to make compromises for browsers below 2%. That currently means Safari 10, Chrome 56, and IE 11. And IE 11 is really stretching it by now–next time it gets in my way, I'll give people a reason to upgrade.

Now I don't have "enterprise" customers, and it's a rather small business. For anything medium-size up, the calculus changes, and probably makes it worthwhile. But at some point, these mystical "enterprises" really have to get their act together and stop dragging technology back to 2006.

But, I'm not arguing that web sites should only serve ES6 to browsers, only that packages should be distributed as ES6 and the app should be responsible for compilation.

No, it isn't. For a lot of web developers, two of those aren't major browsers at all and you've missed the 800lb gorilla. You're also ignoring older versions of mobile browsers, the current Firefox ESR, and at least one other browser that has a larger market share than several of the above in parts of Asia, among other things.

But, I'm not arguing that web sites should only serve ES6 to browsers, only that packages should be distributed as ES6 and the app should be responsible for compilation.

And consequently, the entire community has to start incorporating a heavyweight build process that relies on third party tools just to use modules from the de facto standard package repository, and everyone also has to take extra time checking the exact requirements for every module they directly or indirectly depend on to make sure their build process supports it. In an ecosystem with absurd levels of microdependencies, which is certainly what we have today in JS world, the last thing we need is moving goalposts on the basic assumptions that everyone makes. This sort of thing is exactly why proper, long-lived standards are important as the foundation of a productive development ecosystem.

Not sure the 800lb gorilla you're referring to, but maybe UC Browser? That thing is so odd it's difficult to know what it supports, and it's not supported in nearly any popular CI service. I'm sure all kinds of things are broken on it, but you can still compile your app to ES5.

And ES6 _is_ a proper long lived standard. I'm not sure what would be more standard.

Compiling dependencies is not that heavyweight, especially when there is no configuration. Babel and TypeScript are fast. The results can be cached, it can be done on the fly for dev servers. Requirements shouldn't need to be checked - I'm not advocating for distributing code using decorators or class properties, nor modules (which without the HTML spec on module specifiers isn't a fully functional spec anyway) just plain ES6.

ES5 and ES6 classes cannot coexist on the same proto chain. Compiling to ES5 prevents things like mixins being usable against ES6 superclasses, so you force all dependents to be ES6. If you're going to force one way or the other, force in the future direction where there's still the option to compile the whole app to the older version of JS. ES5 classes can't extend subclassable built-ins like Array, Promise, Set, Map, HTMLElement, Error, etc. ES5 is now mostly slower than the equivalent ES6, it also doesn't minify as well as ES6.

Are you kidding? she/he is talking about IE.

IE11, older FF and Chrome, and especially older mobile devices with older Webkit based browser (Android and iOS)

Messy.

EDIT: I should add, that I didn't want to say that I completely disagree with the change to remvoe this api entirely on twitter to the maintainers. I am sure they get enough crap from people.

Personally I am more concerned about keeping my team building cool features than updating react. This has led to us having two distinctly non-interoperable code bases, one with react 0.12 and one with react 14-15. This makes me worried that now we will have a third with react >15.

I think we can all agree that many of the ideas, while not new, were revolutionary to front-end web developers. And that is what I love about working in this stack. But other than these ideas, the projects themselves are just stumbling along trying to catch up with some perceived "modern" way of coding, and it is the dev teams and projects that suffer.

Maybe you could explain how this is the same thing?

That said, the two are very different tools. Buble appears to be essentially string manipulation (which Babel does to occasionally with babel-template) built on top of Acorn. It's much simpler but there are a lot of useful transformations you simply can't do with that approach.

Edit: After some further looking into the project, I have to say that it seems like it would nice & easy to use for simple transformations, like the aforementioned React.createClass -> class Foo extends React.Component. However, you have to keep in mind that code that is not spec-compliant will break in mysterious ways perhaps months or years into the future. It may not be worth it, despite the ease.

`yarn install babel-cli babel-preset-es2015; ./node_modules/.bin/babel --presets es2015 <sources> -d <out-dir>` is not particularly difficult.

Since you already recognized you know nothing about Buble can you please stop making absurd claims about THINGS YOU DON'T KNOW?

What are specs, by the way? I don't care if Buble isn't following stupid specs. Browser vendors will change these specs a million times, Babel will follow up with new versions with a thousand breaking changes and require you to install a ton of packages, clean old packages, erase your hard disk and kill your neighbours. Buble will just keep working.