Guide to loading TypeScript modules with RequireJS in an ASP.NET MVC/Visual Studio setup

Question

Guide to loading TypeScript modules with RequireJS in an ASP.NET MVC/Visual Studio setup

If we consider a scenario where there are 2 files named test1.ts and test2.ts. The content of test1 is as follows:

export const x = 1

And the content of test2 is:

import { x } from './test2'

alert(x);

Upon running the application, an error message appears:

Uncaught ReferenceError: exports is not defined at test1.js:2

.

It has been pointed out in various sources that this error occurs due to the lack of support for export and require(...) in web browsers. One solution mentioned is integrating RequireJs.

Research led me to an article on this topic, providing clarity.

The initial step involved adding the following line in the _Layout.cshtml file.
```
<script src="~/Scripts/require.js"></script>
```

A configuration file was set up as follows.

requirejs.config({
   baseUrl: '/Scripts/js'
});

Test1 and Test2 were placed in the /Scripts/js directory.

Despite these measures, the recurring error persists:

Uncaught ReferenceError: exports is not defined at test1.js:2

.

How do we address this issue using RequireJs or any alternative method?

Your assistance is greatly appreciated.

EDIT

A resolution utilizing options other than RequireJs would also suffice. Many tutorials on typescript assume node or angularjs usage, creating obstacles for ASP.NET MVC integration. Initially, one-file configurations worked well, but splitting code into separate files posed challenges highlighted by the persisting error. Three days have passed with no progress.

EDIT 2

Following the suggestion by @artem to convert CommonJs to AMD, I made adjustments as shown below,

{
  "compilerOptions": {
     "module": "amd",
     "noImplicitAny": true,
     "removeComments": true,
     "preserveConstEnums": true,
     "sourceMap": true
 }

}

However, a new error arises:

Uncaught Error: Mismatched anonymous define() 
module: function (require, exports, CommonTypes_1) {
//...

Referencing a related discussion on this subject, should the code be relocated to a new file?

asp.net-mvc visual-studio typescript requirejs

Answer 1

Answer №1

Although this may be slightly dated information, I recently encountered a similar issue and managed to find a solution.

I came across a particularly informative post that guided me through the process:

To begin with, include require.js in your BundleConfig.cs. This is an example of how mine appears:

bundles.Add(new ScriptBundle("~/bundles/jquery").Include(
    "~/Scripts/jquery-{version}.js",
    "~/Scripts/require.js"));

Ensure that _Layout.cshtml renders the "scripts" section after your bundles. Here's a snippet from my file:

@Scripts.Render("~/bundles/jquery")
@Scripts.Render("~/bundles/bootstrap")
@RenderSection("scripts", required: false)

In your view, make sure to render the scripts section accordingly. For instance, here is how my Index.cshtml looks:

@section scripts
{
    <script>
        require(["Scripts/Init"],
            function (Init) {
                Init.Start();
            }
        );
    </script>
}

The content of my ~/Scripts/Init.ts file consists of:

import * as DataBind from "./DataBind"

export function Start() {
    DataBind.SetAllDatabinds(null);
}

Subsequently, you can load all your modules as necessary. It's crucial to ensure that there are no loose code fragments in your TypeScript files (e.g. the "alert(x)" mentioned in the example). Everything should be properly exported.

Answer 2

Although this may be slightly dated information, I recently encountered a similar issue and managed to find a solution.

I came across a particularly informative post that guided me through the process:

To begin with, include require.js in your BundleConfig.cs. This is an example of how mine appears:

bundles.Add(new ScriptBundle("~/bundles/jquery").Include(
    "~/Scripts/jquery-{version}.js",
    "~/Scripts/require.js"));

Ensure that _Layout.cshtml renders the "scripts" section after your bundles. Here's a snippet from my file:

@Scripts.Render("~/bundles/jquery")
@Scripts.Render("~/bundles/bootstrap")
@RenderSection("scripts", required: false)

In your view, make sure to render the scripts section accordingly. For instance, here is how my Index.cshtml looks:

@section scripts
{
    <script>
        require(["Scripts/Init"],
            function (Init) {
                Init.Start();
            }
        );
    </script>
}

The content of my ~/Scripts/Init.ts file consists of:

import * as DataBind from "./DataBind"

export function Start() {
    DataBind.SetAllDatabinds(null);
}

Subsequently, you can load all your modules as necessary. It's crucial to ensure that there are no loose code fragments in your TypeScript files (e.g. the "alert(x)" mentioned in the example). Everything should be properly exported.

Guide to loading TypeScript modules with RequireJS in an ASP.NET MVC/Visual Studio setup

EDIT

EDIT 2

Answer №1

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