Import Javascript file & using its function in C# code #62

nguyenhothanhtam0709 · 2022-10-29T15:47:09Z

nguyenhothanhtam0709
Oct 29, 2022

Hi Yantra team,

I'm trying to load Javascript file from C# code. But I didn't find any docs about it.
How can I import and using Javascript function in C# code?

ackava · 2022-10-30T08:59:59Z

ackava
Oct 30, 2022
Maintainer

Hi, we have listed examples on how to use YantraJS, https://github.com/yantrajs/yantra/wiki/JavaScript-Engine-Example , can you give us example of what you want to achieve?

5 replies

nguyenhothanhtam0709 Oct 30, 2022
Author

I'm sorry if my explanation is confusing for you. I want to import and using Javascript code in C# code.

For example, I have a file named script.js having a testFunc function like bellow:

// function in script.js  
export const testFunc = () => {
      console.log("Hello Yantra!");
 }

I want to import and use testFunc in C# code.
How can I import and use this function in C# code like bellow:

// C# code
var module = context.ImportModule("./script.js");
module.func();

ackava Oct 30, 2022
Maintainer

var rootFolder = "... global folder to load node_modules from ... , set this to global npm installed";
var context = new JSModuleContext(rootFolder);

var currentWorkingDirectory = ".... project folder..  that contains local node_modules";
var scriptPath = "... actual script location";
var result = await context.RunAsync(currentWorkingDirectory,  scriptPath);

// result contains exports....
// in your case...

var testFunc = result["testFunc"];

testFunc.InvokeFunction(Arguments.Empty);

nguyenhothanhtam0709 Oct 30, 2022
Author

I have followed your example. But I got this error:
Unhandled exception. YantraJS.Core.JSException: undefined is not a function

My script.js file exports a function named testFunc.
I'm using package YantraJS.Core v1.2.51 in .Net Core 6.0

ackava Oct 30, 2022
Maintainer

It seems export const wasn't working, I have released new fix that should work now.

nguyenhothanhtam0709 Oct 30, 2022
Author

Thanks you so much. It worked.

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Import Javascript file & using its function in C# code #62

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nguyenhothanhtam0709 Oct 29, 2022

Replies: 1 comment · 5 replies

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ackava Oct 30, 2022 Maintainer

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nguyenhothanhtam0709 Oct 30, 2022 Author

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ackava Oct 30, 2022 Maintainer

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nguyenhothanhtam0709 Oct 30, 2022 Author

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ackava Oct 30, 2022 Maintainer

Uh oh!

nguyenhothanhtam0709 Oct 30, 2022 Author

nguyenhothanhtam0709
Oct 29, 2022

Replies: 1 comment 5 replies

ackava
Oct 30, 2022
Maintainer

nguyenhothanhtam0709 Oct 30, 2022
Author

ackava Oct 30, 2022
Maintainer

nguyenhothanhtam0709 Oct 30, 2022
Author

ackava Oct 30, 2022
Maintainer

nguyenhothanhtam0709 Oct 30, 2022
Author