Using Angular's UI Typeahead feature in conjunction with the `$http.get`

Question

Using Angular's UI Typeahead feature in conjunction with the `$http.get`

Seeking assistance with retrieving data from a local server using JSON (not JSONP) and presenting it in a typeahead via Angular UI bootstrap and Angular. Successfully implemented timeout() and jsonp based on examples found, confirming that promises are functioning correctly.

function DepedencyCtrl($scope, $http, $timeout, filterFilter) {
...
$scope.typeahead = function(type, name) {
  return $http.get('pulldata', {params: {type: type, name: name}}).success(function(data){
    return filterFilter(data, name);
  }, 1000);
};

While debugging the code, the line containing return filterFilter executes. JSON data is visible, but navigating through the Angular code becomes confusing. Is there something crucial that I might be overlooking?

javascript json angularjs angular-ui-bootstrap

Answer 1

Answer №1

When working with Angular, it's important to understand the concept of callback functions and asynchronous operations. In JavaScript, there is a lot of asynchrony happening in the background. You initiate an http request, provide a callback function, and move on. Eventually, Angular will trigger the success function you provided, bringing you back into the Angular environment.

Angular simplifies the process by automatically detecting changes in values or expressions it needs to watch for. This is achieved through Angular's special process known as $digest, which is often referred to as Angular's "2-way binding" feature.

To make the most of Angular's 2-way bindings, you can structure your code like this:

$scope.typeaheadText = "";
$scope.typeahead = function(type, name) {
  return $http.get('pulldata', {params: {type: type, name: name}}).success(function(data){
    $scope.typeaheadText = data.typeaheadText;
  }, 1000);
};

Corresponding HTML:

<span ng-controller="YourTypeaheadCtrl">
{{typeaheadText}}
</span>

Answer 2

When working with Angular, it's important to understand the concept of callback functions and asynchronous operations. In JavaScript, there is a lot of asynchrony happening in the background. You initiate an http request, provide a callback function, and move on. Eventually, Angular will trigger the success function you provided, bringing you back into the Angular environment.

Angular simplifies the process by automatically detecting changes in values or expressions it needs to watch for. This is achieved through Angular's special process known as $digest, which is often referred to as Angular's "2-way binding" feature.

To make the most of Angular's 2-way bindings, you can structure your code like this:

$scope.typeaheadText = "";
$scope.typeahead = function(type, name) {
  return $http.get('pulldata', {params: {type: type, name: name}}).success(function(data){
    $scope.typeaheadText = data.typeaheadText;
  }, 1000);
};

Corresponding HTML:

<span ng-controller="YourTypeaheadCtrl">
{{typeaheadText}}
</span>

Using Angular's UI Typeahead feature in conjunction with the `$http.get`

Answer №1

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