Does React Native compile JavaScript into Java for Android?
When I develop hybrid apps with React Native. Does the JavaScript code I write transform into Java-Code or Java-Bytecode for the Dalvik/ART Runtime when I create an Android-App from my React Native code? Or are just the UI components compiled into native UI components? Or does a library like the Fetch API compile the JavaScript code into Java-Code or Java-Bytecode?
javascript java
android react-native react-native-android edited Apr 12 at 0:51
tanguy_k
6,12322939
asked Dec 13 '16 at 15:06
unlimited101
1,27531229
add a comment |
When I develop hybrid apps with React Native. Does the JavaScript code I write transform into Java-Code or Java-Bytecode for the Dalvik/ART Runtime when I create an Android-App from my React Native code? Or are just the UI components compiled into native UI components? Or does a library like the Fetch API compile the JavaScript code into Java-Code or Java-Bytecode?
javascript java
android react-native react-native-android edited Apr 12 at 0:51
tanguy_k
6,12322939
asked Dec 13 '16 at 15:06
unlimited101
1,27531229
add a comment |
When I develop hybrid apps with React Native. Does the JavaScript code I write transform into Java-Code or Java-Bytecode for the Dalvik/ART Runtime when I create an Android-App from my React Native code? Or are just the UI components compiled into native UI components? Or does a library like the Fetch API compile the JavaScript code into Java-Code or Java-Bytecode?
javascript java
android react-native react-native-android edited Apr 12 at 0:51
tanguy_k
6,12322939
asked Dec 13 '16 at 15:06
unlimited101
1,27531229
When I develop hybrid apps with React Native. Does the JavaScript code I write transform into Java-Code or Java-Bytecode for the Dalvik/ART Runtime when I create an Android-App from my React Native code? Or are just the UI components compiled into native UI components? Or does a library like the Fetch API compile the JavaScript code into Java-Code or Java-Bytecode?
javascript java
android react-native react-native-android javascript java
android react-native react-native-android edited Apr 12 at 0:51
tanguy_k
6,12322939
asked Dec 13 '16 at 15:06
unlimited101
1,27531229
edited Apr 12 at 0:51
tanguy_k
6,12322939
asked Dec 13 '16 at 15:06
unlimited101
1,27531229
edited Apr 12 at 0:51
tanguy_k
6,12322939
edited Apr 12 at 0:51
tanguy_k
6,12322939
edited Apr 12 at 0:51
tanguy_k
6,12322939
6,12322939
asked Dec 13 '16 at 15:06
unlimited101
1,27531229
asked Dec 13 '16 at 15:06
unlimited101
1,27531229
asked Dec 13 '16 at 15:06
unlimited101
1,27531229
1,27531229
add a comment |
add a comment |
4 Answers
4
active
oldest
votes
Basically, you write Javascript. The Javascript communicates with native components (Java on Android, Objective C on iOS, C# on Windows).
The communication occurs through the so-called "bridge". If at any time you feel that this communication slows things down too much, you can choose to implement the Javascript functionality in Java, Objective C or C# respectively in order to run purely native. In this case, you are writing directly in native code, so there's no Javascript to native compilation.
This will sacrifice compatibility for performance. Normally, this is not necessary.
answered Dec 13 '16 at 18:18
Marc
2,38242444
2
Best answer cause it's so descriptive. Thank ya. Did you make any performance comparisons between JavaScript logic and Java logic? E.g. have you run network request through e.g. Fetch Api and compared the runtime with e.g. retrofit? Of course this depends more on network speed than on "local" speed. Maybe you made other performance comparisons e.g. fetching the camera object natively and through JavaScript?
– unlimited101
Dec 14 '16 at 6:57
So it isn't native but hybrid, right?
– Offenso
Sep 11 at 18:27
1
It's not hybrid in the sense of something like Ionic, where you're essentially running web-style JS in a webview. In React Native, the Javascript is communicating with Java or Objective C and creating native elements. Native can mean different things depending on where you are — this section of this talk helped me understand it better (I recommend the rest of the talk, too): youtu.be/tWitQoPgs8w?t=318
– Nabha
Oct 31 at 15:39
add a comment |
The code remains the JavaScript native code and is not converted into any other format. The hybrid apps run inside the native container app which invokes JavaScript run time engine which takes care of executing the JavaScript code. I hope this clarifies the question.
answered Dec 13 '16 at 15:10
Gurdev Singh
1,531610
1
Okay. Can you tell me where you have this information from?
– unlimited101
Dec 13 '16 at 15:12
1
facebook.github.io/react-native/docs/…
– Gurdev Singh
Dec 13 '16 at 15:42
2
React native is not hybrid!
– Led
Jun 13 at 13:11
How does it differs from react?
– Offenso
Sep 11 at 18:29
add a comment |
reat native works as a wrapper for example if you want to put a button in your layout you simply put button tag in layout but this button come from native android button and you just use specific API from UI module called react-native. you can create your custom native module and use it in your react native project easily.
answered Oct 10 at 7:08
N.SH
11
add a comment |
Based on "React Made Native Easy" book:
Essentially, React Native can be considered as a set of React
components, where each component represents the corresponding native
views and components.
Also there is two parts in React Native architechture:
Native Code/Modules: Most of the native code in case of iOS is written in Objective C or Swift, while in the case of Android it is
written in Java. But for writing our React Native app, we would hardly
ever need to write native code for iOS or Android.
Javascript VM: The JS Virtual Machine that runs all our JavaScript code. On iOS/Android simulators and devices React Native
uses JavaScriptCore, which is the JavaScript engine that powers
Safari. JavaScriptCore is an open source JavaScript engine originally
built for WebKit. In case of iOS, React Native uses the JavaScriptCore
provided by the iOS platform. It was first introduced in iOS 7 along
with OS X Mavericks.
And for communication between these parts:
React Native Bridge: React Native bridge is a C++/Java bridge which is
responsible for communication between the native and Javascript
thread. A custom protocol is used for message passing.
answered Nov 22 at 18:09
Morteza Ziaeemehr
1,27542040
add a comment |
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
Basically, you write Javascript. The Javascript communicates with native components (Java on Android, Objective C on iOS, C# on Windows).
The communication occurs through the so-called "bridge". If at any time you feel that this communication slows things down too much, you can choose to implement the Javascript functionality in Java, Objective C or C# respectively in order to run purely native. In this case, you are writing directly in native code, so there's no Javascript to native compilation.
This will sacrifice compatibility for performance. Normally, this is not necessary.
answered Dec 13 '16 at 18:18
Marc
2,38242444
2
Best answer cause it's so descriptive. Thank ya. Did you make any performance comparisons between JavaScript logic and Java logic? E.g. have you run network request through e.g. Fetch Api and compared the runtime with e.g. retrofit? Of course this depends more on network speed than on "local" speed. Maybe you made other performance comparisons e.g. fetching the camera object natively and through JavaScript?
– unlimited101
Dec 14 '16 at 6:57
So it isn't native but hybrid, right?
– Offenso
Sep 11 at 18:27
1
It's not hybrid in the sense of something like Ionic, where you're essentially running web-style JS in a webview. In React Native, the Javascript is communicating with Java or Objective C and creating native elements. Native can mean different things depending on where you are — this section of this talk helped me understand it better (I recommend the rest of the talk, too): youtu.be/tWitQoPgs8w?t=318
– Nabha
Oct 31 at 15:39
add a comment |
Basically, you write Javascript. The Javascript communicates with native components (Java on Android, Objective C on iOS, C# on Windows).
The communication occurs through the so-called "bridge". If at any time you feel that this communication slows things down too much, you can choose to implement the Javascript functionality in Java, Objective C or C# respectively in order to run purely native. In this case, you are writing directly in native code, so there's no Javascript to native compilation.
This will sacrifice compatibility for performance. Normally, this is not necessary.
answered Dec 13 '16 at 18:18
Marc
2,38242444
2
Best answer cause it's so descriptive. Thank ya. Did you make any performance comparisons between JavaScript logic and Java logic? E.g. have you run network request through e.g. Fetch Api and compared the runtime with e.g. retrofit? Of course this depends more on network speed than on "local" speed. Maybe you made other performance comparisons e.g. fetching the camera object natively and through JavaScript?
– unlimited101
Dec 14 '16 at 6:57
So it isn't native but hybrid, right?
– Offenso
Sep 11 at 18:27
1
It's not hybrid in the sense of something like Ionic, where you're essentially running web-style JS in a webview. In React Native, the Javascript is communicating with Java or Objective C and creating native elements. Native can mean different things depending on where you are — this section of this talk helped me understand it better (I recommend the rest of the talk, too): youtu.be/tWitQoPgs8w?t=318
– Nabha
Oct 31 at 15:39
add a comment |
Basically, you write Javascript. The Javascript communicates with native components (Java on Android, Objective C on iOS, C# on Windows).
The communication occurs through the so-called "bridge". If at any time you feel that this communication slows things down too much, you can choose to implement the Javascript functionality in Java, Objective C or C# respectively in order to run purely native. In this case, you are writing directly in native code, so there's no Javascript to native compilation.
This will sacrifice compatibility for performance. Normally, this is not necessary.
answered Dec 13 '16 at 18:18
Marc
2,38242444
Basically, you write Javascript. The Javascript communicates with native components (Java on Android, Objective C on iOS, C# on Windows).
The communication occurs through the so-called "bridge". If at any time you feel that this communication slows things down too much, you can choose to implement the Javascript functionality in Java, Objective C or C# respectively in order to run purely native. In this case, you are writing directly in native code, so there's no Javascript to native compilation.
This will sacrifice compatibility for performance. Normally, this is not necessary.
answered Dec 13 '16 at 18:18
Marc
2,38242444
answered Dec 13 '16 at 18:18
Marc
2,38242444
answered Dec 13 '16 at 18:18
Marc
2,38242444
answered Dec 13 '16 at 18:18
Marc
2,38242444
2,38242444
2
Best answer cause it's so descriptive. Thank ya. Did you make any performance comparisons between JavaScript logic and Java logic? E.g. have you run network request through e.g. Fetch Api and compared the runtime with e.g. retrofit? Of course this depends more on network speed than on "local" speed. Maybe you made other performance comparisons e.g. fetching the camera object natively and through JavaScript?
– unlimited101
Dec 14 '16 at 6:57
So it isn't native but hybrid, right?
– Offenso
Sep 11 at 18:27
1
It's not hybrid in the sense of something like Ionic, where you're essentially running web-style JS in a webview. In React Native, the Javascript is communicating with Java or Objective C and creating native elements. Native can mean different things depending on where you are — this section of this talk helped me understand it better (I recommend the rest of the talk, too): youtu.be/tWitQoPgs8w?t=318
– Nabha
Oct 31 at 15:39
add a comment |
2
Best answer cause it's so descriptive. Thank ya. Did you make any performance comparisons between JavaScript logic and Java logic? E.g. have you run network request through e.g. Fetch Api and compared the runtime with e.g. retrofit? Of course this depends more on network speed than on "local" speed. Maybe you made other performance comparisons e.g. fetching the camera object natively and through JavaScript?
– unlimited101
Dec 14 '16 at 6:57
So it isn't native but hybrid, right?
– Offenso
Sep 11 at 18:27
1
It's not hybrid in the sense of something like Ionic, where you're essentially running web-style JS in a webview. In React Native, the Javascript is communicating with Java or Objective C and creating native elements. Native can mean different things depending on where you are — this section of this talk helped me understand it better (I recommend the rest of the talk, too): youtu.be/tWitQoPgs8w?t=318
– Nabha
Oct 31 at 15:39
2
2
Best answer cause it's so descriptive. Thank ya. Did you make any performance comparisons between JavaScript logic and Java logic? E.g. have you run network request through e.g. Fetch Api and compared the runtime with e.g. retrofit? Of course this depends more on network speed than on "local" speed. Maybe you made other performance comparisons e.g. fetching the camera object natively and through JavaScript?
– unlimited101
Dec 14 '16 at 6:57
Best answer cause it's so descriptive. Thank ya. Did you make any performance comparisons between JavaScript logic and Java logic? E.g. have you run network request through e.g. Fetch Api and compared the runtime with e.g. retrofit? Of course this depends more on network speed than on "local" speed. Maybe you made other performance comparisons e.g. fetching the camera object natively and through JavaScript?
– unlimited101
Dec 14 '16 at 6:57
So it isn't native but hybrid, right?
– Offenso
Sep 11 at 18:27
So it isn't native but hybrid, right?
– Offenso
Sep 11 at 18:27
1
1
It's not hybrid in the sense of something like Ionic, where you're essentially running web-style JS in a webview. In React Native, the Javascript is communicating with Java or Objective C and creating native elements. Native can mean different things depending on where you are — this section of this talk helped me understand it better (I recommend the rest of the talk, too): youtu.be/tWitQoPgs8w?t=318
– Nabha
Oct 31 at 15:39
It's not hybrid in the sense of something like Ionic, where you're essentially running web-style JS in a webview. In React Native, the Javascript is communicating with Java or Objective C and creating native elements. Native can mean different things depending on where you are — this section of this talk helped me understand it better (I recommend the rest of the talk, too): youtu.be/tWitQoPgs8w?t=318
– Nabha
Oct 31 at 15:39
add a comment |
The code remains the JavaScript native code and is not converted into any other format. The hybrid apps run inside the native container app which invokes JavaScript run time engine which takes care of executing the JavaScript code. I hope this clarifies the question.
answered Dec 13 '16 at 15:10
Gurdev Singh
1,531610
1
Okay. Can you tell me where you have this information from?
– unlimited101
Dec 13 '16 at 15:12
1
facebook.github.io/react-native/docs/…
– Gurdev Singh
Dec 13 '16 at 15:42
2
React native is not hybrid!
– Led
Jun 13 at 13:11
How does it differs from react?
– Offenso
Sep 11 at 18:29
add a comment |
The code remains the JavaScript native code and is not converted into any other format. The hybrid apps run inside the native container app which invokes JavaScript run time engine which takes care of executing the JavaScript code. I hope this clarifies the question.
answered Dec 13 '16 at 15:10
Gurdev Singh
1,531610
1
Okay. Can you tell me where you have this information from?
– unlimited101
Dec 13 '16 at 15:12
1
facebook.github.io/react-native/docs/…
– Gurdev Singh
Dec 13 '16 at 15:42
2
React native is not hybrid!
– Led
Jun 13 at 13:11
How does it differs from react?
– Offenso
Sep 11 at 18:29
add a comment |
The code remains the JavaScript native code and is not converted into any other format. The hybrid apps run inside the native container app which invokes JavaScript run time engine which takes care of executing the JavaScript code. I hope this clarifies the question.
answered Dec 13 '16 at 15:10
Gurdev Singh
1,531610
The code remains the JavaScript native code and is not converted into any other format. The hybrid apps run inside the native container app which invokes JavaScript run time engine which takes care of executing the JavaScript code. I hope this clarifies the question.
answered Dec 13 '16 at 15:10
Gurdev Singh
1,531610
answered Dec 13 '16 at 15:10
Gurdev Singh
1,531610
answered Dec 13 '16 at 15:10
Gurdev Singh
1,531610
answered Dec 13 '16 at 15:10
Gurdev Singh
1,531610
1,531610
1
Okay. Can you tell me where you have this information from?
– unlimited101
Dec 13 '16 at 15:12
1
facebook.github.io/react-native/docs/…
– Gurdev Singh
Dec 13 '16 at 15:42
2
React native is not hybrid!
– Led
Jun 13 at 13:11
How does it differs from react?
– Offenso
Sep 11 at 18:29
add a comment |
1
Okay. Can you tell me where you have this information from?
– unlimited101
Dec 13 '16 at 15:12
1
facebook.github.io/react-native/docs/…
– Gurdev Singh
Dec 13 '16 at 15:42
2
React native is not hybrid!
– Led
Jun 13 at 13:11
How does it differs from react?
– Offenso
Sep 11 at 18:29
1
1
Okay. Can you tell me where you have this information from?
– unlimited101
Dec 13 '16 at 15:12
Okay. Can you tell me where you have this information from?
– unlimited101
Dec 13 '16 at 15:12
1
1
facebook.github.io/react-native/docs/…
– Gurdev Singh
Dec 13 '16 at 15:42
facebook.github.io/react-native/docs/…
– Gurdev Singh
Dec 13 '16 at 15:42
2
2
React native is not hybrid!
– Led
Jun 13 at 13:11
React native is not hybrid!
– Led
Jun 13 at 13:11
How does it differs from react?
– Offenso
Sep 11 at 18:29
How does it differs from react?
– Offenso
Sep 11 at 18:29
add a comment |
reat native works as a wrapper for example if you want to put a button in your layout you simply put button tag in layout but this button come from native android button and you just use specific API from UI module called react-native. you can create your custom native module and use it in your react native project easily.
answered Oct 10 at 7:08
N.SH
11
add a comment |
reat native works as a wrapper for example if you want to put a button in your layout you simply put button tag in layout but this button come from native android button and you just use specific API from UI module called react-native. you can create your custom native module and use it in your react native project easily.
answered Oct 10 at 7:08
N.SH
11
add a comment |
reat native works as a wrapper for example if you want to put a button in your layout you simply put button tag in layout but this button come from native android button and you just use specific API from UI module called react-native. you can create your custom native module and use it in your react native project easily.
answered Oct 10 at 7:08
N.SH
11
reat native works as a wrapper for example if you want to put a button in your layout you simply put button tag in layout but this button come from native android button and you just use specific API from UI module called react-native. you can create your custom native module and use it in your react native project easily.
answered Oct 10 at 7:08
N.SH
11
answered Oct 10 at 7:08
N.SH
11
answered Oct 10 at 7:08
N.SH
11
answered Oct 10 at 7:08
N.SH
11
11
add a comment |
add a comment |
Based on "React Made Native Easy" book:
Essentially, React Native can be considered as a set of React
components, where each component represents the corresponding native
views and components.
Also there is two parts in React Native architechture:
Native Code/Modules: Most of the native code in case of iOS is written in Objective C or Swift, while in the case of Android it is
written in Java. But for writing our React Native app, we would hardly
ever need to write native code for iOS or Android.
Javascript VM: The JS Virtual Machine that runs all our JavaScript code. On iOS/Android simulators and devices React Native
uses JavaScriptCore, which is the JavaScript engine that powers
Safari. JavaScriptCore is an open source JavaScript engine originally
built for WebKit. In case of iOS, React Native uses the JavaScriptCore
provided by the iOS platform. It was first introduced in iOS 7 along
with OS X Mavericks.
And for communication between these parts:
React Native Bridge: React Native bridge is a C++/Java bridge which is
responsible for communication between the native and Javascript
thread. A custom protocol is used for message passing.
answered Nov 22 at 18:09
Morteza Ziaeemehr
1,27542040
add a comment |
Based on "React Made Native Easy" book:
Essentially, React Native can be considered as a set of React
components, where each component represents the corresponding native
views and components.
Also there is two parts in React Native architechture:
Native Code/Modules: Most of the native code in case of iOS is written in Objective C or Swift, while in the case of Android it is
written in Java. But for writing our React Native app, we would hardly
ever need to write native code for iOS or Android.
Javascript VM: The JS Virtual Machine that runs all our JavaScript code. On iOS/Android simulators and devices React Native
uses JavaScriptCore, which is the JavaScript engine that powers
Safari. JavaScriptCore is an open source JavaScript engine originally
built for WebKit. In case of iOS, React Native uses the JavaScriptCore
provided by the iOS platform. It was first introduced in iOS 7 along
with OS X Mavericks.
And for communication between these parts:
React Native Bridge: React Native bridge is a C++/Java bridge which is
responsible for communication between the native and Javascript
thread. A custom protocol is used for message passing.
answered Nov 22 at 18:09
Morteza Ziaeemehr
1,27542040
add a comment |
Based on "React Made Native Easy" book:
Essentially, React Native can be considered as a set of React
components, where each component represents the corresponding native
views and components.
Also there is two parts in React Native architechture:
Native Code/Modules: Most of the native code in case of iOS is written in Objective C or Swift, while in the case of Android it is
written in Java. But for writing our React Native app, we would hardly
ever need to write native code for iOS or Android.
Javascript VM: The JS Virtual Machine that runs all our JavaScript code. On iOS/Android simulators and devices React Native
uses JavaScriptCore, which is the JavaScript engine that powers
Safari. JavaScriptCore is an open source JavaScript engine originally
built for WebKit. In case of iOS, React Native uses the JavaScriptCore
provided by the iOS platform. It was first introduced in iOS 7 along
with OS X Mavericks.
And for communication between these parts:
React Native Bridge: React Native bridge is a C++/Java bridge which is
responsible for communication between the native and Javascript
thread. A custom protocol is used for message passing.
answered Nov 22 at 18:09
Morteza Ziaeemehr
1,27542040
Based on "React Made Native Easy" book:
Essentially, React Native can be considered as a set of React
components, where each component represents the corresponding native
views and components.
Also there is two parts in React Native architechture:
Native Code/Modules: Most of the native code in case of iOS is written in Objective C or Swift, while in the case of Android it is
written in Java. But for writing our React Native app, we would hardly
ever need to write native code for iOS or Android.
Javascript VM: The JS Virtual Machine that runs all our JavaScript code. On iOS/Android simulators and devices React Native
uses JavaScriptCore, which is the JavaScript engine that powers
Safari. JavaScriptCore is an open source JavaScript engine originally
built for WebKit. In case of iOS, React Native uses the JavaScriptCore
provided by the iOS platform. It was first introduced in iOS 7 along
with OS X Mavericks.
And for communication between these parts:
React Native Bridge: React Native bridge is a C++/Java bridge which is
responsible for communication between the native and Javascript
thread. A custom protocol is used for message passing.
answered Nov 22 at 18:09
Morteza Ziaeemehr
1,27542040
answered Nov 22 at 18:09
Morteza Ziaeemehr
1,27542040
answered Nov 22 at 18:09
Morteza Ziaeemehr
1,27542040
answered Nov 22 at 18:09
Morteza Ziaeemehr
1,27542040
1,27542040
add a comment |
add a comment |
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