how to save form data to database in angularjs - angularjs

Question

I am pretty new in angular.
I'm working on an internal tool where I can get the user details like location, work profile and mobile number etc.
So i have a form with location, work profile dropdowns and mobile number input field. Here for the above fields im already getting data from database through ajax get request. If i want to change data like mobileNumber, how can i do that and how to save that to database which should override the before mobile number. thanks in advance.
here is my html code:
<form name="userForm">
<div class="page-heading fs-xs-1-5">
Update Profile
</div>
<div class= "second-row">
<div class="row">
<div class="col-lg-4">
<label for="Location"> Location</label>
<select class="form-control" placeholder="location" ng-model="user.location" required>
<option value="">Select Location</option>
<option>Hyderabad</option>
<option>Ahmadabad</option>
<option>New Jersey</option>
<option>California</option>
<option>Jaipur</option>
</select>
</div>
<div class="col-lg-4">
<label for="WorkProfile"> Work Profile</label>
<select class="form-control" placeholder="workprofile" ng-model="user.workProfile" required>
<option value="">Select Profile</option>
<option>UI Developer</option>
<option>Tester</option>
</select>
</div>
<div class="col-lg-4">
<label for="ContactNumber"> Contact Number</label>
<input class="form-width contact-height" type="text" ng-model="user.mobileNumber" maxlength="20" required></input>
</div>
</div>
</div>
<div class="third-row">
<div class="row">
<div class="col-lg-4">
<label for="SkillSet"> Skill Set</label>
<textarea id="SkillSet" class="form-width" placeholder="Enter Your skill set here..." row="4" col="100" ng-model="user.skillset" maxlength="250" required></textarea>
</div>
</div>
</div>
<button class="btn btn-primary setng-btn" type="submit" ng-click="addnewdata">Save</button>
</form>
js:`
(function () {
angular
.module('app.login')
.factory('userprofileService', userprofileService);
userprofileService.$inject = ['config', '$http'];
function userprofileService (config, $http) {
var userprofileService = this;
userprofileService.getUserDetails = function(){
return $http({
method: 'GET',
url: config.apiURL+'/v2/user',
headers: { 'Content-Type': 'application/json' }
}).then(function(response){
return response.data;
});
}
`

Answer 1

That will be too much to make clear.
for short, you need REST service as backend to call to save data.
AngularJS project is only front-end, you need backend ( to develop with Nodejs, JSP or asp.net/C# ) to serve this purpose.