Detect if the user fills the form with the autofill option of google chrome

You can use two way data binding here and watch the ng model on the form field for changes

<form method="post">
  First name:<input type="text" name="fname" ng-model="user.fname"/><br />
  Last name: <input type="text" name="lname" ng-model="user.lname"/><br />
  E-mail: <input type="text" name="email" ng-model="user.email"/><br />
  Phone: <input type="text" name="phone" ng-model="user.phone"/><br />
  Address: <input type="text" name="address" ng-model="user.address"/><br />
</form>

Then inside your angular controller you can do something of this sort.

angular.module('app', []).controller('AppController', function($scope){
  $scope.user = { };
  $scope.$watch('user', function(nv, ov){
    console.log(nv);
  }, true);
});

There might be some cases that you need to handle though, to prevent sending multiple requests because $watch function will be triggered every time the value in the text field changes.

Here is a fiddle which triggers $watch when any value in a form field changes, be it via autofill or manual entry by user.

In this case, the way to detect when Chrome auto-fills a form instead of the user doing it is by detecting the absence of an event having occurred, such as the keyup event. Consider the block of HTML and Javascript below. I have the text input field marked with a data attribute that is initially set to false. If the user fills out anything in the form by typing, then the attribute is set to true. The moment when you record whether or not the user filled out the form is on form submit. Then you can check the fields of the form and see if the user entered the input his or herself.

<form onsubmit="dosomething()">
    <label for="somefield"></label>
    <input type="text" id="somefield" onkeyup="this.setAttribute('data-entered', (this.value != '').toString());" data-entered="false" />
    <input type="submit" value="submit"/>
</form>

The reason why you need to use a keyboard event and send the information when the form is submitted is because you can only tell if auto-fill took place when any of the fields have values even when the user typed nothing in. This part is less about code, and is more about what needs to be done so to take a proper measurement.