I have been digging a little bit into Hermes (a mobile first JS engine)
focused on React Native. Since I shared most of it on twitter, I want to "copy"
the content here to persist it for me, I know I am coming back to this eventually and this way I get up to speed
faster.
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React Native (RN) 0.64 was just released.
One of the things I had stumbled upon more often lately in RN
code was the word "hermes". I didn't know what kinda tool or package that was.
Until I informed myself a bit.
In short: Hermes is a mobile optimized JavaScript engine.
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KeyboardAvoidingView the Missing Docs
If you are struggling with React Native's KeyboardAvoidingView and it does not behave as you expect,
the most probable reason is some flex layout issue.
I highly recommend reading
KeyboardAvoidingView not working properly? Check your Flexbox Layout first
by Nick Yang.
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does not show a shadow
This is a collection of things I sometimes need when working with React Native and my external Android device.
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React Native has a component Pressable. Used like so <Pressable>clickable thing</Pressable>.
It is a more abstract way to build a button or something that a user can click.
The component Pressable has one Android-specific attribute android_ripple,
which allows to customize the UX of the ripple effect.
I think the visual feedback the ripple effect provides is very user-friendly, it indicates if a click was detected.
So I am investing time in making it work well, but it's not that easy.
Let me share my learnings.
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The plan:
The React Native picker is a module I had a couple of
touchpoints
with. Even before it had moved repositories. Now it moved again.
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Theme.AppCompat
https://developer.android.com/guide/topics/ui/look-and-feel/themes?hl=en#CustomizeTheme
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I never did android development, only the React Native side of things.
Now while digging deeper, trying to figure out how to style a React Native picker on android (because the default is really ugly)
I am reading into android docs. I found out how to break my app's rendering with one line of XML. Not true, five lines of XML.
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Theme.AppCompat is supplied by the Android Support Library
When I started digging into the styles.xml file of our React Native app I found XML like this:
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I am wondering if the React Native Picker component is still maintained and if it is usable or if I am totally
looking at the wrong thing for using a picker for a mobile app.
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This is newsletter #4 - about crafting (and) JavaScript - March 20th, 2017. Every Monday you will receive a hand-selected collection of links about JavaScript and how to craft better software. Let's get started ...