Require nodejs "child_process" with TypeScript, SystemJS and Electron

For me it worked with the callback to display the results.

import * as child from 'child_process';

 var foo: child.ChildProcess = child.exec('dir', (error: string, stdout: string, stderr: string) => {
            console.log(stdout);      
        });

I didn't add any mappings in SystemJS as I dont have any such configuration in the node application

Ok, after some research #L138 I have found the solution

You can use import as before

import * as child from 'child_process';

var foo: child.ChildProcess = child.exec('foo.sh');
console.log(typeof foo.on);

But you should configure SystemJS to map the module to NodeJS.

System.config({
  map: {
    'child_process': '@node/child_process'
  }
});

That's it!

If the error message is 'Cannot find module 'child_process' or its corresponding type declarations' the answer is 'npm install @types/watch'