angularjsHow can I use the $q.defer method in AngularJS?
The $q.defer method in AngularJS is a service that helps you to create and use promises. It allows you to make asynchronous calls and return a promise object that can be used to handle the result of the call.
The $q.defer method takes a single parameter, which is a function that will be called when the promise is resolved. This function should return a promise object.
Here is an example of how to use the $q.defer method in AngularJS:
var deferred = $q.defer();
// do something asynchronous
setTimeout(function() {
deferred.resolve('Promise resolved!');
}, 1000);
deferred.promise.then(function(result) {
console.log(result); // 'Promise resolved!'
});
The code above creates a deferred object and then resolves it after 1 second. Once the deferred object is resolved, the promise object is returned and the then
function is called with the result of the promise.
Code explanation
- Create a deferred object using
$q.defer()
- Do something asynchronous
- Resolve the deferred object using
deferred.resolve()
- Retrieve the result of the promise using
deferred.promise.then()
Helpful links
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