ReactJS.NET MVC tutorial doesn't work?

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梦毁少年i
梦毁少年i 2021-01-12 09:40

I\'m trying to setup a new project in Visual Studio that is going to be MVC 5 with a single page app written in ReactJS. So I followed the guide on the ReactJS website.

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  • 2021-01-12 10:02

    This is how the .jsx handler can be registered in web.config:

    <handlers>
      <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified"/>
      <remove name="Babel" />
      <add name="Babel" verb="GET" path="*.jsx" type="React.Web.BabelHandlerFactory, React.Web" preCondition="integratedMode" />
    </handlers>
    

    and in this case there is no need to have type="text/jsx" in script tag.

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  • 2021-01-12 10:09

    The first thing you need to ensure is that you are indeed creating an ASP.NET MVC 5 application and not an ASP.NET Core, as the tutorials are different.

    For ASP.NET MVC 4 & 5: https://reactjs.net/getting-started/tutorial_aspnet4.html For ASP.Net Core: https://reactjs.net/getting-started/tutorial.html

    If you are creating an ASP.NET MVC 5 application then follow the steps below:

    Steps:

    1. Create a new MVC 5 project.
    2. In the package manager console, install the following NuGet packages:

    Install-Package react.js

    Install-Package React.Web.Mvc4

    You will notice that a folder called 'react' will be created in 'Scripts'

    1. In the Scripts folder create a new '.jsx' file and name it:

    Tutorial.jsx

    This is your where your react code will go.

    1. Copy the following code into your newly created '.jsx' file:

    var CommentBox = React.createClass({ 
        render: function() { 
            return (
              <div className="commentBox">
                Hello, world! I am a CommentBox.
              </div>
            ); 
         } 
       }); 
    
    ReactDOM.render(
        <CommentBox />, 
         document.getElementById('content') 
    );

    1. In your Index view, which is in the Home folder under views, place the following code:
    @{ Layout = null; }
    <html>
    
    <head>
      <title>Hello React</title>
    </head>
    
    <body>
      <div id="content"></div>
      <script src="@Url.Content(" ~/Scripts/react/react.js ")"></script>
      <script src="@Url.Content(" ~/Scripts/react/react-dom.js ")"></script>
      <script src="https://cdnjs.cloudflare.com/ajax/libs/remarkable/1.7.1/remarkable.min.js"></script>
      <script src="@Url.Content(" ~/Scripts/Tutorial.jsx ")"></script>
    </body>
    
    </html>
    

    Now if you run the application you should get the following in your browser window: 'Hello, world! I am a CommentBox.'

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  • 2021-01-12 10:15

    I figured it out - the tutorial is missing two things:

    1. The script inclusion should be done thus, with a type declaration:

      <script type="text/jsx" src="/Scripts/Tutorial.jsx"></script>

    2. The JSX transformer needs to be included:

      <script src="http://fb.me/JSXTransformer-0.12.2.js"></script>

    So the full HTML output by the Razor view should look like this:

    <!DOCTYPE html>
    <html>
      <head>
        <title>Hello React</title>
      </head>
      <body>
        <div id="content"></div>
        <script src="http://fb.me/react-0.12.2.js"></script>
        <script src="http://fb.me/JSXTransformer-0.12.2.js"></script>
        <script type="text/jsx" src="/Scripts/Tutorial.jsx"></script>
      </body>
    </html>
    

    Looks like they need to update their tutorial.

    Update:

    Commenter @DanielLoNigro added this helpful tip:

    Actually if you're using ReactJS.NET, you don't need to use the client-side JSXTransformer. Just ensure that the JSX handler is configured in your Web.config file (there should be a handler for .jsx).

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  • 2021-01-12 10:19

    For me, even though my system was 64bit, I had to install JavaScriptEngineSwitcher.V8.Native.win-x86instead of JavaScriptEngineSwitcher.V8.Native.win-x64 and it solved the problem. It will interesting to hear why should I have to install x86 package.

    PS: Mind you, that was for ASP.Net MVC though.

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