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问题:

I'm exploring Electron and I've run into a roadblock. I can't figure out how to load the Dojo Toolkit and use it in Electron.

For example, here is the simple "Hello World" for Dojo:

<!DOCTYPE html>
<html>
<head>
    <title>Tutorial: Hello Dojo!</title>
</head>
<body>
    <h1 id="greeting">Hello</h1>
    <!-- load Dojo -->
    <script src="//ajax.googleapis.com/ajax/libs/dojo/1.10.4/dojo/dojo.js"
        data-dojo-config="async: true"></script>
    <script>
        require([
            'dojo/dom',
            'dojo/dom-construct'
        ], function (dom, domConstruct) {
            var greetingNode = dom.byId('greeting');
            domConstruct.place('<em> Dojo!</em>', greetingNode);
        });
    </script>
</body>
</html>

That works fine in a browser, but doesn't work at all in Electron. After a couple hours of googling and trying 50 different experiments I've gotten nowhere.

Can someone please enlighten me?

回答1:

While you can disable node-integration as Shwany said, I believe that will effectively render the ipc modules useless, which will probably pose undesirable limitations since you won't be able to communicate between the main and renderer processes.

However, it is possible, with a bit of finagling, to get Dojo to play nice with Electron. There are only a couple of things you need to do in your entry page.

Firstly, force the host-node has feature to false. This can be done by setting it in dojoConfig.has, e.g.:

var dojoConfig = {
    async: true,
    has: {
        'host-node': false
    }
}

Secondly, as Shwany pointed out, Dojo is going to see the already-existing require, so we need to move that out before loading Dojo:

// Move Electron's require out before loading Dojo
window.electronRequire = require;
delete window.require;

After loading dojo.js, you can move Dojo's require elsewhere and move Electron's back, if you wish. Whether you want to do this may depend on how you intend to code the client side of your application. Ostensibly, Dojo's global require is never needed, since you can request a context-sensitive require in any defined module via the 'require' module ID.

If you want to see a scaffolded Electron application incorporating Dojo, I created a boilerplate a few weeks ago (though be advised it's currently relying on a fork of electron-packager). If you want to see an example of a more full-blown Electron/Dojo application, I wrote a music player called Nukebox a couple of months ago which uses Dojo and dgrid (though its scaffolding is a bit different than the newer boilerplate).

回答2:

I have your test code working in Electron.

First, I assume you are trying to load dojo.js from the web. //ajax.googleapis... etc will probably attempt to pull the file from the file system. I added http: to the front of it. That allowed me to open a .html file in the browser and work. I am not sure if that was an oversight or not.

Secondly, because the browser-window has node-integration on by default, 'require' is already defined and it does not understand what you are passing to it because it expects a path not an array. If you construct your browser window with node-integration turned off it should work:

  app.on('ready', function() {  
  mainWindow = new BrowserWindow({width: 800, height: 600, "node-integration": false});  
  mainWindow.loadUrl('file://' + __dirname + '/index.html');
  mainWindow.openDevTools();
  mainWindow.on('closed', function() {
    mainWindow = null;
  });  
});

Note the "node-integration": false. This may cause additional issues if you want to use node integrations in your app. However, your code should work.