A Deep Dive on React Native [video]

#1

Post by arasmussen » Thu, Jan 29, 2015, 11:58 PM UTC

A Deep Dive on React Native [video]
youtube.com

Re: A Deep Dive on React Native [video]

#2

Post by lemming » Fri, Jan 30, 2015, 3:17 AM UTC

This looks really nice. One question that I've found conflicting information about - is JavaScriptCore JITed on iOS 8? I know it isn't on iOS 7 and earlier, my understanding was that it was on iOS 8 but it's hard to find a definitive answer. Anyone know?

Re: A Deep Dive on React Native [video]

#3

Post by lbradstreet » Fri, Jan 30, 2015, 3:47 AM UTC

lemming wrote: post #2

This looks really nice. One question that I've found conflicting information about - is JavaScriptCore JITed on iOS 8? I know it isn't on iOS 7 and earlier, my understanding was that it was on iOS 8 but it's hard to find a definitive answer. Anyone know?

The new webkit view (WKWebView) is JITed. I'm not sure about using JavaScriptCore independently of it though.

Re: A Deep Dive on React Native [video]

#4

Post by spicyj » Fri, Jan 30, 2015, 3:48 AM UTC

lbradstreet wrote: post #3

lemming wrote: post #2

This looks really nice. One question that I've found conflicting information about - is JavaScriptCore JITed on iOS 8? I know it isn't on iOS 7 and earlier, my understanding was that it was on iOS 8 but it's hard to find a definitive answer. Anyone know?

The new webkit view (WKWebView) is JITed. I'm not sure about using JavaScriptCore independently of it though.

JavaScriptCore isn't JITed, even on iOS 8.

Re: A Deep Dive on React Native [video]

#5

Post by thoman23 » Fri, Jan 30, 2015, 4:59 AM UTC

I'm definitely interested in seeing what React, and React Native, can do, but I have to say these people cheering like Ofrah just gave them a free car are kind of turning me off.

"This is a native component". "WOOOOOOOOH!!!" "YEAH!!"

Re: A Deep Dive on React Native [video]

#6

Post by lynndylanhurley » Fri, Jan 30, 2015, 5:04 AM UTC

The one thing that's prevented me from using flex-box is browser support.

Because flex-box has been re-implemented in JS, does this mean that the css-layout project [1] will provide flex-box support for older browsers?

I looked, but I couldn't find a "compatibility" section anywhere in the repo.

[1] https://github.com/facebook/css-layout

Re: A Deep Dive on React Native [video]

#7

Post by rattray » Fri, Jan 30, 2015, 5:14 AM UTC

thoman23 wrote: post #5

I'm definitely interested in seeing what React, and React Native, can do, but I have to say these people cheering like Ofrah just gave them a free car are kind of turning me off. "This is a native component". "WOOOOOOOOH!!!" "YEAH!!"

It's a speech. People cheer during speeches. Also, it's pretty mind blowing that they're actually calling native components from JS if you ask me.

Re: A Deep Dive on React Native [video]

#8

Post by albertoleal » Fri, Jan 30, 2015, 5:18 AM UTC

lynndylanhurley wrote: post #6

The one thing that's prevented me from using flex-box is browser support. Because flex-box has been re-implemented in JS, does this mean that the css-layout project [1] will provide flex-box support for older browsers? I looked, but I couldn't find a "compatibility" section anywhere in the repo. [1] https://github.com/facebook/css-layout

From what I can tell, it can support older browsers, since the CSS output is very primitive.

My current issue is how to measure text sizes: https://github.com/facebook/css-layout/blob/master/src/__tes...

Re: A Deep Dive on React Native [video]

#9

Post by oliyoung » Fri, Jan 30, 2015, 5:40 AM UTC

I've been down on "cross platform native apps" because they're always the lowest common denominator of the language and platform, but this looks intriguing.

Re: A Deep Dive on React Native [video]

#10

Post by morenoh149 » Fri, Jan 30, 2015, 6:25 AM UTC

lynndylanhurley wrote: post #6

The one thing that's prevented me from using flex-box is browser support. Because flex-box has been re-implemented in JS, does this mean that the css-layout project [1] will provide flex-box support for older browsers? I looked, but I couldn't find a "compatibility" section anywhere in the repo. [1] https://github.com/facebook/css-layout

He mentioned in the video how what they've implemented is a subset of css. Sounds like 'CSS the good parts' and may be renderable on older browsers.