如何在 dart2js 创建的 js 代码中从主 function 返回值

Question

I have dart code that returns a string when it is ran

main(){
print("hello");
 return "hello";
}

Now i need to call this from js so i used dart2js to convert it to js.

How i call it from a node.js application:

var sudokuLib = require('./sudoku-lib');
console.log(require('./sudoku-lib'));

I am aware of the large amount of code created by dart2js and it is not a problem since whenever i run the converted js file or the above js code, hello is being printed in the console. But the problem is that I want the returned value to be stored in a variable in my js code, since i will be using the value in my node application.

Is there any way to do this??

Answer 1

I will assume that your dart code is now js code and runing fine:

For exemple like this sudoku-lib.js:

function main() {
    return "Hello"
}

// add the code below
module.exports = { main };

in a new js file "file.js" you can simply write:

const lib = require("./sudoku-lib");
// store it in result var
const result = lib.main();
console.log(`The result is: ${result}`);

Ref node-modules-import-and-use-functions-from-another-file