I have an app module defining dependencies (taken from phonecat-Tutorial) in the directory app:
app.module.js:
angular.module('phonecatApp', [
'phoneList' // (*)
]);
Then, in a directory app/phone-list are the module:
phone-list/phone-list.module.js:
angular.module('phoneList', []);
and component:
phone-list/phone-list.component.js:
angular.module('phoneList').component('phoneList', {...});
From registering the module phoneList in the first snippet at (*), how does AngularJS knows where to fetch the module from? Is the mapping from phoneList to phone-list-directory naming a builtin feature?
AngularJS has a dictionnary of modules. The key in this dictionnary is the string that you give your module when you register it with the following line :
angular.module('phoneList', []);
That's why the previous line must always have been executed in javascript before you can use your module by adding a component (like following line) :
angular.module('phoneList').component('phoneList', {...});
or by injecting your module into another module
angular.module('phonecatApp', [
'phoneList'
]);
The code for relevant modules has to be included in scripts included in the page. This is either done by manually adding various script tags or by task runners like grunt, gulp, webpack etc adding them for you.
If dependency module code doesn't exist angular will throw error
In simpler terms - where the code comes from is not angular's responsibility. It has to already exist for angular to work
I'm trying to clear memory of previous module of my app which Im not going to use after I've routed to a different location.
So for example my "WebApp" is my main angular module of my app which has dependency of "catalogApp", "PaymentApp", etc modules. I want to remove the previous module as and when I route from 1 module to another.
So, Can we remove/delete module?
I am not sure about deleting modules as such. But you can use ocLazyLoad to lazy load modules only when they are required.
I have two modules, like the following ones:
var a = angular.module('a', []);
a.config(['$interpolateProvider', function($interpolateProvider) {
$interpolateProvider.startSymbol('<[');
$interpolateProvider.endSymbol(']>');
}]);
var b = angular.module('b', ['a']);
I'm running some tests, but I can't figure out if the interpolate configuration in a module is being inherited in b module.
Does angular inherit the config of modules into another modules?
Inheritance isn't the issue here, you are configuring a provider that is used by both modules, and angular is going to apply each config in the order that you register them. From the docs:
When bootstrapping, first Angular applies all constant definitions.
Then Angular applies configuration blocks in the same order they were
registered.
You can reset the values of $interpolateProvider start and end symbols, but you cannot have both settings in your application since you are modifying the same provider in each config block.
Here's a plunk showing this in action.
When we write angular.module('app',['ngRoute']); what exactly dependencies here mean?
to be precise ngRoute is nothing but a simple angular module like
angular.module('ngRoute',['ng']) in which has $routeProvider
`angular.module('ngRoute',[]).provider('$roteProvider',[function(){}]).services('$route',function(){}).service('$routeParam',function(){})`
Its better to see the angular project in github https://github.com/angular/angular.js/blob/master/src/ngRoute/route.js
Dependencies means the list of modules that particular module in your case 'app' is dependent on , you when you state them as dependencies they get injected in the module at initialization and become available for usage
I am trying to get started with Karma tests, adding them to an existing Angular app.
This is my main app definition file:
angular
.module('myApp', [
'ngRoute',
'moduleAdherence'
]);
This is my controller file:
angular
.module('moduleAdherence', [])
.controller('AdherenceCtrl', ['$scope', function ($scope) {
$scope.awesomeThings = [1,2,3,4];
}]);
This is my first stab at a file:
describe('Controller: AdherenceCtrl', function () {
beforeEach(module('myApp'));
var MainCtrl,
scope;
beforeEach(inject(function ($controller, $rootScope) {
scope = $rootScope.$new();
MainCtrl = $controller('AdherenceCtrl', {
$scope: scope
});
}));
it('should attach a list of awesomeThings to the scope', function () {
expect(scope.awesomeThings.length).toBe(4);
});
});
When I try to run this with grunt test, it fails with the following error:
Uncaught Error: [$injector:nomod] Module 'd3' is not available!
You either misspelled the module name or forgot to load it.
If registering a module ensure that you specify the dependencies
as the second argument.
http://errors.angularjs.org/1.2.0/$injector/nomod?p0=d3
at /Users/me/Dropbox/projects/myapp/app/bower_components/angular/angular.js:1498
I don't understand this, because this controller does not Use D3. I do use D3 elsewhere in the app, in a directive, but I'm not registering it with the module (I use the external D3 file).
Why is Karma noticing D3? Shouldn't it be able to test this controller without D3?
In karma configuration file (karma.conf.js) you need to define all libraries.
etc.
// list of files / patterns to load in the browser
files: [
'app/lib/angular/angular.js',
'app/lib/angular-route/angular-route.js',
'test/lib/angular-mocks.js',
'app/app.js',
'app/controllers/*.js',
'app/services/*.js',
'app/*',
'test/spec/**/*.js'
],
Had a similar problem and my solution (inspired someway by #danba comment) was to load the scripts in the files in the exact same order as they were loaded in the index.html.
In my case globbing patterns like app/scripts/**/*.js were causing trouble to karma which constantly threw errors.
Maybe not the most elegant solution to copy all the scripts definitions but worked in the end so my test could finally get back running. Hope it helps.
EDIT: Editing this because today I probably (and hopefully) got the hang of what was going wrong here. So it seems that Karma does not like globbing patterns when the same module is defined in one file and used in many different files. Let's say that your folder structure is like this:
Suppose that in AuthService.js you have your module definition for all your services in that folder, so that that file starts with:
angular.module('myApp.services', [
'myApp.urls',
'ngCookies'
])
Then in all the other files you're just attaching other services to that same module. In the picture tokenService.js would start with:
angular.module('myApp.services');
If everything stays this way everything will probably work. But if by any chance I define the module the other way round, so the module definition is not anymore in the first file of that folder but on another that Karma reads after AuthService then it will throw an error and refuse to complete the tests.
Solution 1
A solution might be to put the module definition in its own file, starting with an underscore. Finally, let all the siblings files depend on that one(s). So the above folder structure should be:
Solution 2
Another - probably better - solution is to mark the files where the modules are defined with a common suffix/extension for example service.module.js while the files that depend on it could be named normally like authService.js, tokenService.js.
The Karma configuration at that point will become something like:
// list of files / patterns to load in the browser
files: [
'app/lib/angular/angular.js',
'test/lib/angular-mocks.js',
'app/app.js',
'app/**/*.module.js', // <-- first the module definitions...
'app/**/*.js', // <-- ..then all the other files
'test/spec/**/*.js'
],
This way karma will load the modules definitions first and then those file that depend on them.
I also had the same issue, in my case problem occured because there were several files per module which is a bad practice since we can point to not initialized module. Solved this by including just one file per module.
Always load the non minified version of angular into karma.
it will display errors and help you better to find out what to change.
In your case, it's the order of the files being loaded by karma.
Check your index.html that you don't include something by a script tag like.
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.5angular-resource.js"
All your Javascript file need to be in your karma.config.js
Here's a simple solution that worked for me, based on above Solution #1 by #Nobita, AND #danba's comment.
In karma.conf.js, explicitly load the prerequisite file above the pattern that pulls in the rest:
files: [
...
'app/module.js',
'app/*.js'
]
Karma does not seem to mind that the pattern also matches 'module.js'.