Overview Last week NativeScript made it into public beta and just for a few days we got tremendous amount of feedback. One question that came up over and over again was, “How do NativeScript Apps Perform”? In this post, I want to explain the details behind performance and share some great news with you about …
Author Archives: mslavchev
Java Class Inheritance in NativeScript for Android
One of the more advanced scenarios in NativeScript for Android is the inheritance of Java classes. Let’s take a look at the following example. // app.js var MyButton = android.widget.Button.extend({ setEnabled: function(enabled) { // do something } }); var btn = new MyButton(context); (Please note that at the time of writing NativeScript is in private …
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Efficient IO in Android
What could be simpler than a file copy? Well, it turned out that I underestimated such an easy task. Here is the scenario. During the very first NativeScript for Android application startup the runtime extracts all JavaScript asset files to the internal device storage. The source code is quite simple and it was based on …
First Impressions using Windows 10 Technical Preview for phones
Windows 10 Technical Preview for phones was released two days ago and today I decided to give it a try. The installation process on my Nokia 630 was very smooth and completed for about 30 minutes including the migration of the old data. Finally, I ended up with WP10 OS version 9941.12498. After I used …
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Object Oriented Programming: An Evolutionary Approach
This post is not about the book Object Oriented Programming: An Evolutionary Approach by Brad Cox. I decided to use the book’s title because the author nailed the connection between software and evolution. It is a good book, by the way. I recommend it. Last week a coworker sent me a link to the React.js …
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The Quiet Horror of instanceof Operator
During the last months I was busy with NativeScript more than ever. While my work keeps me busy with embedding V8 JavaScript engine I rarely have the chance to write JavaScript. Recently I had to deal with mapping Java OOP inheritance into JavaScript and more specifically I had to fix a failing JavaScript unit test …
Embedding Chakra JavaScript Engine on Windows Phone
Today I am going to show you how to embed Chakra JavaScript engine in Windows Phone 8.1 app. Please note that at the time of writing this app won’t pass Microsoft Windows Store certification requirements. I won’t be surprised though if Microsoft reconsider their requirements in future. Last year Microsoft released JsRT which exposes C-style …
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Running JavaScriptCore on Windows Phone 8.1
After the first release of NativeScript I decided to spend some time playing with JavaScriptCore engine. We use it in NativeScript bridge for iOS and so far I heard good words about it from my colleagues. So I decided to play with JavaScriptCore and compare it to V8 engine. At present NativeScript supports Android and …
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NativeScript is Live
I am happy to announce that yesterday our team released the first early preview of NativeScript. The last few months I worked on the JavaScript-to-Java bridge for Android platform. Check out the introductory blog post and the documentation pages.
Synchronizing GC in Java and V8
In the last post I wrote that I work on a project that involves a lot of interoperability between Java and V8 JavaScript engine. Here is an interesting problem I was investigating the last couple of days. Both V8 and JVM use garbage collector for memory management. While using GC provides a lot of benefits …