Efficiently utilize the built-in services $http, $location, etc. in Angular_AngularJS

AngularJS provides us with numerous built-in services, through which we can easily implement some common functions. The following is a summary of the commonly used built-in services in Angular.
1.$location service

$location服务用于返回当前页面的URL地址，示例代码如下：
var app = angular.module('myApp', []); 
app.controller('customersCtrl', function($scope, $location) { 
 $scope.myUrl = $location.absUrl(); 
}); 

Here the myUrl variable is defined for the $scope object, and then the $location service is used to read the URL address and store it in myUrl.
2..$http service
$http is the most commonly used service in AngularJS, and it is often used for data transfer from the server. In the example below, the service sends a request to the server, and the application responds with data sent by the server.

var app = angular.module('myApp', []); 
app.controller('myCtrl', function($scope, $http) { 
 $http.get("welcome.htm").then(function (response) { 
  $scope.myWelcome = response.data; 
 }); 
}); 

3.$timeout() service and $interval() service
The functions of these two services correspond to the setTimeout() and setTimeInterval functions in JavaScript. A simple real-time update time example is as follows:

app.controller('myCtrl', function($scope, $interval) { 
 $scope.theTime = new Date().toLocaleTimeString(); 
 $interval(function () { 
  $scope.theTime = new Date().toLocaleTimeString(); 
 }, 1000); 
}); 

In addition to the built-in services provided in Angular, we can also define our own services by using service. The following is a basic code framework for defining services:

app.service('hexafy', function() { 
 this.myFunc = function (x) { 
  return x.toString(16); 
 } 
}); 

After defining the service, we can use it just like the built-in Angular service:

app.controller('myCtrl', function($scope, hexafy) { 
 $scope.hex = hexafy.myFunc(255); 
}); 

The above is a summary of commonly used built-in services in Angular. I hope it will be helpful to everyone's learning.