Delivering Configuration to Angular Application

What is the best approach for passing settings to an AngularJS app?

Technology stack:

  • Node.js
  • AngularJS

Example of how settings might look:

window.settings = {};
settings.webSocketURL = 'ws://domain.com/websocket';
settings.webSocketTopic = 'name';

Here are a few different options to consider:

  1. Include the script 

    <script src="scripts/settings.js"></script>

    Disadvantages: The settings.js file is in the scripts directory rather than the root directory, and it requires an additional script load.

  2. Include the script as in option 1, but have settings.js generated by Node.js.

    Disadvantage: Requires an additional script load.

  3. Embed the settings directly into the HTML.

    Disadvantage: Requires the use of templating like EJS instead of pure HTML.

javascriptangularjs

Answer №1

I encountered a comparable issue, but was able to resolve it by utilizing the following configuration:

myapp
.constant("configuration", {
  "webSocketURL": 'ws://domain.com/websocket',
  "webSocketTopic": "name"
})

Subsequently, within your controllers, you simply need to inject the settings and access them using configuration.webSocketURL

Answer №2

One option is to easily generate a config module wherever it fits best for you

// configuration/app.js
angular.module('MyConfigApp', [])
  .config ($provide) ->
    $provide.constant 'apiURL', 'http://example.com/api'
    $provide.constant 'apiKey', 'abc123'

After creating the config module, you can then concatenate it with your application script using a Grunt task or custom script.

Answer №3

My solution includes the following steps:

  • Firstly, place client settings in the server config.

    config.settings = {};
  • Next, generate a JS file using Node.js.

    app.get('/settings.js', function(req, res) {
        res.setHeader('Content-Type', 'application/javascript');
        res.setHeader('Cache-Control', 'no-cache, no-store, must-revalidate');
        res.setHeader('Pragma', 'no-cache');
        res.setHeader('Expires', 0);

        res.send('window.settings = ' + JSON.stringify(config.settings) + ';');
    });
  • Lastly, define an AngularJS constant.

    angular.module('app')
        .constant('settings', window.settings)

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