function end before angularjs promise resolve

Question

$scope.clickfunction = function(arg){
  var url ="";
  var httppromise = $scope.promiseufunction(arg); // return a http promise 
    httppromise.then(function(res){
     if(res){
         url ="path/"
         $('#htmlelement').attr('href', url);
       }else{
        url="path2/"
          $('#htmlelement').attr('href', url);
        };
       });
      }  //<---- this line execute before the inner function of promise.then

I have an anchor tag with ng-click that calls the above clickfunction function. I rely on the promise to resolve and update the href attribute, but I found that the end of function have reached before the innner function of promise.then(), and that causes my ng-click not work properly as i expected , href attribute updated after the ng-click event on href.

How can solve this,to make sure the inner function of promise work before reach the end of this function?

Answer 1

You could use ng-href to update the href once the promise is resolved. Here is a simulation of the concept.

 var app = angular.module("sampleApp", []); app.controller("sampleController", ["$scope", "$timeout", function($scope, $timeout) { // Simulating the variable update at a later point. $timeout(function() { $scope.testUrl = "http://stackoverflow.com"; }, 3000) } ]); 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.8/angular.min.js"></script> <div ng-app="sampleApp"> <div ng-controller="sampleController as vm"> <a ng-href="{{testUrl}}">Google</a> </div> 

So, keeping the above way as a reference, you could use ngHRef on the #htmlElement as use a model property that populates the value using a promise.

HTML

<a ng-href="newHref">Some anchor </a>

JS

$scope.clickfunction = function(arg) {
  var url = "";
  var httppromise = $scope.promiseufunction(arg); // return a http promise 
  httppromise.then(function(res) {
    if (res) {
      url = "path/";
    } else {
      url = "path2/"
    };
    $scope.newHref = url;
  });
}