validation - How to show error messages in AngularJS? -

i have services , controllers written in angularjs, in sending post request node.js application , using send status , code send error message username exists orwrong email , password not getting how show these errors in frontend html. after submit pressed probably. how go it?

$http.post('/register', registeruser).then(function(response){                 console.log(response.data); } 

how show response .data in html. read $error in angular don't think work in case mine custom error.

thanks

your html should like:

<div ng-if="errormessage">{{ errormessage }}</div> 

then can modify $scope.errormessage display it:

$http.post('/register', registeruser).then(function(response){     switch(response.data) {         case 'loginexists':             $scope.errormessage = 'username exists';             break;         case 'loginerror':             $scope.errormessage = 'wrong email , password';             break;         default:             $scope.errormessage = false;     } }