Hello Horizon! On November 11th, we submitted a patch to introduce AngularJS into Horizon [1]. We believe AngularJS adds a lot of value to Horizon.
First, AngularJS allows us to write HTML templates for interactive elements instead of doing jQuery-based DOM manipulation. This allows the JavaScript layer to focus on business logic, provides easy to write JavaScript testing that focuses on the concern (e.g. business logic, template, DOM manipulation), and eases the on-boarding for newdevelopers working with the JavaScript libraries.
Second, AngularJS is not an all or nothing solution and integrates with the existing Django templates. For each feature that requires JavaScript, we can write a self-contained directive to handle the DOM, a template to define our view and a controller to contain the business logic. Then, we can add this directive to the existing template. To see an example in action look at _workflow_step_update_member.html [2]. It can also be done incrementally - this isn't an all-or-nothing approach with a massive front-end time investment, as the Angular components can be introduced over time.Finally, the initial work to bring AngularJS to Horizon provides a
springboard to remove the "DOM Database" (i.e. hidden-divs) used on the membership page (and others). Instead of abusing the DOM, we can instead expose an API for membership data, add an AngularJS resource (i.e. reusable representation of API entities) for the API. The data can then be loaded data asynchronously and allow the HTML to focus on expressing a semantic representation of the data to the user.Please give our patch a try! You can find the interactions on
Domains/Groups, Flavors/Access(this form does not seem to work in current master or on my patch) and Projects/Users&Groups. You should notice that it behaves...exactly the same!We look forward to your feedback. Jordan O'Mara & Jirka Tomasek
[1] [https://review.openstack.org/#/c/55901/] [2] [https://github.com/jsomara/horizon/blob/angular2/horizon/templates/horizon/common/_workflow_step_update_members.html]
-- Jordan O'Mara <jomara at redhat.com>Red Hat Engineering, Raleigh
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