ReactEngineNotFoundException on Azure

[andpoulsen]

I'm building an asp.net mvc core application with server side rendering and I get ReactEngineNotFoundException, when I deploy to Azure.
You might see the entire callstack yourself here: http://dotnetopeniddemo.azurewebsites.net
I have created an Azure web app, and I'm deploying to it from Visual Studio. It works locally in IIS Express, but not on Azure.

[jordan-yee]

I'm running into the same issue. My .NET Core 1.1 web application works locally, but throws an exception when published:

ReactEngineNotFoundException: No usable JavaScript engine was found. Please install a JavaScript engine such as React.JavaScriptEngine.ClearScriptV8 (on Windows) or React.JavaScriptEngine.VroomJs (on Linux and Mac OS X). Refer to the ReactJS.NET documentation for more details.

Since it seems to be an issue with the JavaScript engine, I thought adding .DisableServerSideRendering() to app.UseReact(config => { }) might be a work around, but the exception occurs with or without server side rendering.

I think we may need to do something along the lines of this article, but the last few steps are outdated: http://www.samulihaverinen.com/web-development/dotnet/2016/01/19/how-to-run-clearscript-v8-javascript-engine-in-azure/

[jordan-yee]

I was able to get the application working when published to Azure using a combination of these guides:
http://www.samulihaverinen.com/web-development/dotnet/2016/01/19/how-to-run-clearscript-v8-javascript-engine-in-azure/
https://github.com/Taritsyn/JavaScriptEngineSwitcher/wiki/Registration-of-JS-engines

From the first guide, I installed dependencies separately:
Uninstall-Package React.AspNet
Install-Package JavaScriptEngineSwitcher.Core
Install-Package JavaScriptEngineSwitcher.Msie (May not be needed)
Install-Package JSPool
Install-Package JavaScriptEngineSwitcher.ChakraCore
Install-Package JavaScriptEngineSwitcher.ChakraCore.Native.win-x64 (Selected native implementation)
Install-Package Microsoft.ChakraCore (I think this is key to enabling ChakraCore on the server)
Install-Package React.AspNet -IgnoreDependencies

From the second guide, I installed a package to enable JavaScriptEngineSwitcher configuration in .NET Core 1.X:
Install-Package JavaScriptEngineSwitcher.Extensions.MsDependencyInjection

In Startup.cs ConfigureServices():
services.AddJsEngineSwitcher(options => options.DefaultEngineName = ChakraCoreJsEngine.EngineName).AddChakraCore();

[Taritsyn]

Install-Package Microsoft.ChakraCore

@jyee117 This package is not needed. I recommend you to read the documentation.

[Taritsyn]

@andpoulsen @jyee117 I recommend to read the “Misconceptions about the JavaScript Engine Switcher version 2.X” post.

[andrewwang1tw]

I was able to get the application working when published to Azure using a combination of these guides:
http://www.samulihaverinen.com/web-development/dotnet/2016/01/19/how-to-run-clearscript-v8-javascript-engine-in-azure/
https://github.com/Taritsyn/JavaScriptEngineSwitcher/wiki/Registration-of-JS-engines

From the first guide, I installed dependencies separately:
Uninstall-Package React.AspNet
Install-Package JavaScriptEngineSwitcher.Core
Install-Package JavaScriptEngineSwitcher.Msie (May not be needed)
Install-Package JSPool
Install-Package JavaScriptEngineSwitcher.ChakraCore
Install-Package JavaScriptEngineSwitcher.ChakraCore.Native.win-x64 (Selected native implementation)
Install-Package Microsoft.ChakraCore (I think this is key to enabling ChakraCore on the server)
Install-Package React.AspNet -IgnoreDependencies

From the second guide, I installed a package to enable JavaScriptEngineSwitcher configuration in .NET Core 1.X:
Install-Package JavaScriptEngineSwitcher.Extensions.MsDependencyInjection

In Startup.cs ConfigureServices():
services.AddJsEngineSwitcher(options => options.DefaultEngineName = ChakraCoreJsEngine.EngineName).AddChakraCore();

This save me, thanks.

[Taritsyn]

Install-Package Microsoft.ChakraCore (I think this is key to enabling ChakraCore on the server)

@andrewwang1tw I recommend you to read the “ChakraCore” section of “Misconceptions about the JavaScript Engine Switcher version 2.X” discussion.

[dustinsoftware]

Closing issues older than a year, please re-open if you think this is still relevant.