How do I use rootScope in Angular to store variables

Question

How do I use  rootScope to store variables in a controller I want to later access in another controller  For example   angular module  myApp   controller  myCtrl   function  scope      var a     something in the scope     put it in the root scope      angular module  myApp   controller  myCtrl2   function  scope      var b     get var a from root scope somehow     use var b       How would I do this

User · Answer

http   astutejs blogspot in 2015 07 angularjs-what-is-rootscope html   app controller  AppCtrl2   function   scope   rootScope          scope msg    SCOPE         rootScope name    ROOT SCOPE

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angular module  myApp   controller  myCtrl   function  scope   rootScope       var a     something in the scope      put it in the root scope      rootScope test    TEST         angular module  myApp   controller  myCtrl2   function  scope   rootScope       var b     get var a from root scope somehow      use var b      scope value    rootScope test     alert  scope value           var b    rootScope test       alert b          DEMO

User · Answer

If it is just  access in other controller  then you can use angular constants for that  the benefit is  you can add some global settings or other things that you want to access throughout application  app constant    appGlobals           defaultTemplatePath    assets html template        appName   My Awesome App        and then access it like   app controller    SomeController         appGlobals     function SomeController config        console log appGlobals       console log    default path     appGlobals defaultTemplatePath           didn t test   more info  http   ilikekillnerds com 2014 11 constants-values-global-variables-in-angularjs-the-right-way

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first store the values in  rootScope as   run function  rootScope    rootScope myData    name    nikhil        controller  myCtrl   function  scope    var a   Nikhilesh    scope myData name   a        controller  myCtrl2   function  scope    var b    scope myData name        rootScope is the parent of all  scope  each  scope receives a copy of  rootScope data which you can access using  scope itself

User · Answer

i find no reason to do this  scope value    rootScope test    scope is already prototype inheritance from  rootScope    Please see this example  var app   angular module  app      run function  rootScope    rootScope userName    Rezaul Hasan         now you can bind this scope variable in anywhere in app tag

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Sharing data between controllers is what Factories Services are very good for  In short  it works something like this   var app   angular module  myApp         app factory  items   function         var items           var itemsService            itemsService add   function item            items push item              itemsService list   function             return items              return itemsService       function Ctrl1  scope items         scope list   items list      function Ctrl2  scope  items         scope add   items add      You can see a working example in this fiddle  http   jsfiddle net mbielski m8saa

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There are multiple ways to achieve this one -  1  Add  rootScope in  run method   run function   rootScope         rootScope name    Peter           Controller  controller  myController   function   scope  rootScope        console log  Name in rootscope    rootScope name       OR     console log  Name in scope    scope name         2  Create one service and access it in both the controllers    factory  myFactory   function           var object             object users     John    James    Jake           return object        Controller A   controller  ControllerA   function  myFactory        console log  In controller A    myFactory          Controller B   controller  ControllerB   function  myFactory        console log  In controller B    myFactory

User · Answer

Variables set at the root-scope are available to the controller scope via prototypical inheritance   Here is a modified version of  Nitish s demo that shows the relationship a bit clearer  http   jsfiddle net TmPk5 6   Notice that the rootScope s variable is set when the module initializes  and then each of the inherited scope s get their own copy which can be set independently  the change function    Also  the rootScope s value can be updated too  the changeRs function in myCtrl2   angular module  myApp        run function  rootScope         rootScope test   new Date        controller  myCtrl   function  scope   rootScope       scope change   function              scope test   new Date                 scope getOrig   function             return  rootScope test             controller  myCtrl2   function  scope   rootScope         scope change   function              scope test   new Date                 scope changeRs   function              rootScope test   new Date                 scope getOrig   function             return  rootScope test

[angularjs] How do I use $rootScope in Angular to store variables?

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