How to dynamic add new element in Angularjs - json

Question

I have a ng-repeat to loop my object value to view.
Then I want to have a button to add new blank element to the last of ng-repeat value.
How can I do this in angular?
My data is json object. I tried
In controller
$scope.objs = {'a': 'a', 'b':'b'};
In view
{{Object.keys(objs).length}};
But nothing show in view.
Update
<div ng-repeat="docstep in docs.docsteps" class="docstep">
{{docstep.text}}
</div>
Then I want to get the length of objects so I can .length + 1 in the button click
But I have no idea how to get objects length. Or is there any better idea?

Answer 1

Bind a click handler to the button using ng-click:
<div ng-repeat="docstep in docs.docsteps" class="docstep">
<input type="text" value="{{docstep.text}}">
</div>
<button ng-click="addNew()">Add another input</button>
When this button is clicked. It will add another blank input
<br>Which the new input will be docstep3
This is how your JS should look:
var myApp = angular.module('myApp',[]);
myApp.run(function($rootScope){
$rootScope.docs = {
"docsteps" : {
"docstep1" : {
"text" : "a"
},
"docstep2" : {
"text" : "b"
}
}
}
var c = 2;
$rootScope.addNew = function(){
count++;
$rootScope.docs.docsteps["docstep"+count] = {"text":count}
}
});
NOTE: You should use ng-app to define work area for angular and use controllers to reside the models(docs) and define the behaviour of your view (addNew).

Answer 2

I took your ng-repeat and made it work. Notice I put your object in the $rootScope but you can apply the same object to any scope that your ng-repeat is in.
JS
var myApp = angular.module('myApp',[]);
myApp.run(function($rootScope){
$rootScope.docs={docsteps:[{text:'A'},{text:'B'},{text:'C'}]};
});
JSFIDDLE: http://jsfiddle.net/mac1175/Snn9p/