2

In normal JavaScript, you can declare variables like this;

var obj = {};
obj["item-text"] = {};
obj["item text"] = {};

Example given here: http://jsbin.com/petafu/1/edit

And it's perfectly fine. But this doesn't seem to work in angular on the $scope. I attempted to do this and could not really understand why, but cannot find any resources talking about it...

JS

app.controller('ControllerName', function($scope){
   $scope['item text'] = {};
   $scope['item-text'] = {};
});

HTML

<div ng-model="item text"></div>
<div ng-model="item-text"></div>
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4
  • I'm not really contesting or upset about the proposed edits to my simple word and capitalization choices, but can I ask the reasoning? Is it because of some sort of standards or search engine compliance? Personal preference? Grammatically irksome? Commented Jul 30, 2014 at 17:27
  • Your examples of "normal JavaScript" do not work Commented Jul 30, 2014 at 17:47
  • Sorry, just forgot a small part of it - I'm a little absentminded today. Commented Jul 30, 2014 at 18:00
  • I didn't write it correctly at first, no. I'm sorry, I just got ahead of myself. But the way I am using variables does indeed work fine; you can see it yourself here: jsbin.com/petafu/1/edit Commented Jul 30, 2014 at 18:02

3 Answers 3

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4

If you really want hyphens and spaces I'd probably go with controller as syntax.

View:

<body ng-controller="MainCtrl as ctrl">
  <p>Hello {{ctrl.name}}!</p>
  <input ng-model="ctrl.name1" />
  <input ng-model="ctrl['name-2']" />
  <input ng-model="ctrl['name 3']" />
</body>

Controller:

app.controller('MainCtrl', function($scope) {
  this.name = 'World';
  this['name1'] = "world1";
  this['name-2'] = "world 2";
  this['name 3'] = "world 3";
});

Using your obj variable.

Controller:

var obj = {};
obj["item-text"] = {};
obj["item text"] = {};
$scope.obj = obj;

View:

<body ng-controller="MainCtrl">
  <input ng-model="obj['item text']" />
  <input ng-model="obj['item-text']" />
</body>

http://plnkr.co/edit/OqTN59Ewsc6ydKnjSGbx?p=preview

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7 Comments

Yeah, that works - but why does it work when done on this, but it cannot when done on $scope? Is there something special about $scope?
Okay, so you could do it on $scope, just not quite how you have it. Set $scope.obj = obj as you define it in your question and it should work in the view. I can add another example if that would help.
So I would simply assign $scope.obj = obj and then would put obj['name-2'] = //..assignment..// or obj['name 2'] = //..assignment..//? That does accomplish what I need for this specific use case, but I'm still not clear why it cannot be done to $scope directly. There must be something special about it as an object...
You could get ride of the as. plnkr.co/edit/96Mb2dFz5ETwuONXEshT?p=preview
@Ciel I think a quick read through this will help you clear your doubts.
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2

$scope in Angular's context is an object. It refers to the application model.

Therefore, 

$scope.item_text = 'Hello';

or 

$scope['item_text'] = 'Hello';

should both work.

However, please take note of ng-model which can be only used on form elements.

With any of the above declarations,

<input type="text" ng-model="item_text">

will work

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1 Comment

So a dash simply cannot exist in a variable name for any reason? It has to be an underscore?
0

Try writing like this 

$scope.itemText={};

use should consider using camelcase in javascript as spaces and dashes often causes too many problems

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1 Comment

Well. I'm aware of that, but I would still like to understand it. I have some situations where it is needed, such as third party libraries that don't give me control of the names they expect.

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