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I am trying to use Angularjs framework in my app with turbolinks. After page change it do not initialize new eventlisteners. Is it any way to make it work? Thanks in advance!
995
Turbolinks as well as AnguluarJS can both be used to make a web application respond faster, in the sense that in response to a user interaction something happens on the web page without reloading and rerendering the whole page.
They differ in the following regard:
AngularJS helps you to build a rich client-side application, where you write a lot of JavaScript code that runs on the client machine. This code makes the site interactive to the user. It communicates with the server-side backend, i.e. with the Rails app, using a JSON API.
Turbolinks, on the other hand, helps to to make the site interactive without requiring you to code JavaScript. It allows you to stick to the Ruby/Rails code run on the server-side and still, "magically", use AJAX to replace, and therefore rerender, only the parts of the page that have changed.
Where Turbolinks is strong in allowing you use this powerful AJAX mechanism without doing anything by hand and just code Ruby/Rails, there might come a stage, as your application grows, where you would like to integrate a JavaScript framework such as AngularJS.
Especially in this intermedium stage, where you would like to successively integrate AngularJS into your application, one component at a time, it can make perfectly sense to run Angular JS and Turbolinks together.
In your Angular code, you have a line defining your application module, something like this:
# app/assets/javascripts/angular-app.js.coffee
# without turbolinks
@app = angular.module 'MyApplication', ['ngResource']
This code is run when the page is loaded. But since Turbolinks just replaces a part of the page and prevents an entire page load, you have to make sure, the angular application is properly initialized ("bootstrapped"), even after such partial reloads done by Turbolinks. Thus, replace the above module declaration by the following code:
# app/assets/javascripts/angular-app.js.coffee
# with turbolinks
@app = angular.module 'MyApplication', ['ngResource']
$(document).on 'turbolinks:load', ->
angular.bootstrap document.body, ['MyApplication']
You often see in tutorials how to bootstrap an Angular app automatically by using the ng-app attribute in your HTML code.
<!-- app/views/layouts/my_layout.html.erb -->
<!-- without turbolinks -->
<html ng-app="YourApplication">
...
But using this mechanism together with the manual bootstrap shown above would cause the application to bootstrap twice and, therefore, would brake the application.
Thus, just remove this ng-app attribute:
<!-- app/views/layouts/my_layout.html.erb -->
<!-- with turbolinks -->
<html>
...
Turbolinks attempt to optimize rendering of pages and would conflict with normal bootstraping of AngularJS.
If you are using Turbolinks in some places of your app and some parts use Angular. I propose this elegant solution:
Each link to a page that is angularapp (where you use ng-app="appname") should have this attribute:
<a href="/myapp" data-no-turbolink>Say NO to Turbolinks</a>.
The second - mentioned on Stackoverflow is explicitly reloading/bootstrapping every ng-app by handling page:load event. I would that's intrusive, not to mention you're potentially loading something that isn't on a page hence wasting resources.
I've personally used the above solution.
Hope it helps
42
In case of bug
Uncaught Error: [ng:btstrpd] App Already Bootstrapped with this Element 'document'
after upgrade to angular 1.2.x you can use below to fix problem.
angular.module('App').run(function($compile, $rootScope, $document) {
return $document.on('page:load', function() {
var body, compiled;
body = angular.element('body');
compiled = $compile(body.html())($rootScope);
return body.html(compiled);
});
});
In previous post @nates proposed to change angular.bootstrap(document, ['YourApplication']) to angular.bootstrap("body", ['YourApplication']) but this causes a flash of uncompiled content.
4
Add the following event handler to your application.
Coffeescript:
bootstrapAngular = ->
$('[ng-app]').each ->
module = $(this).attr('ng-app')
angular.bootstrap(this, [module])
$(document).on('page:load', bootstrapAngular)
Javascript:
function bootstrapAngular() {
$('[ng-app]').each(function() {
var module = $(this).attr('ng-app');
angular.bootstrap(this, [module]);
});
};
$(document).on('page:load', bootstrapAngular);
This will cause the angular application to be started after each page loaded by Turbolinks.
Credit to https://gist.github.com/ayamomiji/4736614
2
Turbolinks doesn't quite make sense with an client side MVC framework. Turbolinks is used to to strip out the all but the body from server response. With client-side MVC you should just be passing JSON to the client, not HTML.
In any event, turbolinks creates its own callbacks.
page:load
page:fetch
page:restore
page:change
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