Run non-inline JS locally in Electron

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I'd like to stick all of my separate JS scripts as files in another folder when developing locally. The only way I've been able to do this is if I don't declare the meta statement. However, by not declaring it, I of course get a warning.

Electron Security Warning (Insecure Content-Security-Policy) This renderer process has either no Content Security Policy set or a policy with "unsafe-eval" enabled. This exposes users of this app to unnecessary security risks.

Is there a way to do it locally without either ignoring or violating CSP?

content-security-policy electron node.js javascript
1 Answers

Set the following meta tag in the renderers.

<meta http-equiv="Content-Security-Policy" content="script-src 'nonce-xxx or sha256-yyy' " />

Kindly checkout my github repo electron-renderer-CSP-sample, containing samples for both nonce & SHA methods for internal & external js files as well.

OR

You can make use of preload argument in webPreferences while creating the main BrowserWindow. In the main.js,

  mainWindow = new BrowserWindow({
    webPreferences: {
      nodeIntegration: false,
      preload: path.join(__dirname, 'preload.js')
    }
  })

In the preload.js

        const remote = require("electron").remote;
// electron APIs
        window.appQuit = function() {
          remote.app.exit(0);
        };
// node modules
       window.notify= function notify(msg) {
       return require('node-notifier').notify(msg);
       };
// DOM can be manipulated from here (Refer 
// https://github.com/electron/electron-quick-start/blob/master/preload.js)
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