Import Javascript file & using its function in C# code

[nguyenhothanhtam0709]

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]

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?

[nguyenhothanhtam0709]

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]

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]

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]

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

[nguyenhothanhtam0709]

Thanks you so much. It worked.