angular.js - How to create public functions in Angularjs

Question

I have two functions that need to be used on many pages. How can I extract them separately and put them into a js file?
I see that most of the information on the Internet is to create a service or factory and then embed it in the controller. But my two functions are called inside another function. I tried to put the child controller into the function and an error occurred. What should I do? Is there any other way?
My code looks like:

var app = angular.module('myApp', []);
app.controller('Ctrl', function($scope, $http) {
$scope.z = function{

$scope.word1 = 1;
$scope.word2 = 2;
$http.get(url, config)
                .then(function (response) {
                $scope.items = response.data.data;
                $scope.a();
                }
 $scope.b= function{
 $scope.a();
 }               
   $scope.a= function{   
   }          
}
}）；

Where functions a and b are the public functions I need to bring up. word1 and word2 are also used in these two functions, but I don't want to mention them because these two values ​​​​are different on each page. At present, this writing method can be implemented on my page. How can we put these two functions into a separate js file?

Answer 1

// app作为全局变量
window.app = angular.module('myApp', []);

// 下面这段提成一个单独的xxxCtrl.js文件
app.controller('Ctrl', [
  '$scope',
  '$http',
  'yourService',
  function($scope, $http, yourService) {
    // a方法调用
    yourService.a();
    // b方法调用
    yourService.b();
  }
]);

// 下面这段提成一个单独的xxxService.js文件
app.factory('yourService', ['', function() {
  // a,b公用方法
  var temp = function() {
    //...
  };

  function Service() {
    this.a = function() {
      temp();
      //...
    }
    this.b = function() {
      temp();
      //...
    }
  }
  return new Service();
}])

Answer 2

It is still used as a service, passing word1, word2 and the like as parameters, which is flexible and reusable

Answer 3

The public method can be extracted and put into the service, and then the service can be injected into the public method that needs to be called