Soh*_*are 5 javascript ajax angularjs angular-directive
我写了一个指令,它有助于在ajax请求挂起时禁用按钮.
这是我的指示:
.directive('requestPending', ['$http', function ($http) {
return {
restrict: 'A',
scope: {
'requestPending': '='
},
link: function (scope, el, attr) {
scope.$watch(function () {
return $http.pendingRequests.length;
}, function (requests) {
scope.requestPending = requests > 0;
})
}
}
}])
HTML就像:
<button request-pending="pending" ng-disabled="pending">Save</button>
想知道这是否是一种正确的做法.我想不要使用$ watch
谢谢.
与 Angular 一样，没有特别“正确的方法”来做某些事情，但有一些选择。
例如，您可以$http使用装饰器扩展服务并使用自定义事件。
或者你也可以利用杠杆$httpProvider.interceptors。
<!DOCTYPE html>
<html ng-app="app">
<head>
<script data-require="angular.js@1.4.7" data-semver="1.4.7" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular.js"></script>
<link rel="stylesheet" href="style.css" />
<script>
angular
.module('app', [])
.config(function ($httpProvider) {
$httpProvider.interceptors.push(function ($rootScope) {
var activeRequests = 0;
return {
request: function (config) {
$rootScope.pending = true;
activeRequests++;
return config;
},
response: function (response) {
activeRequests--;
if(activeRequests === 0) {
$rootScope.pending = false;
}
return response;
}
}
});
})
.controller('appCtrl', function($scope, $http) {
$scope.makeRequestOne = function() {
$http
.get('https://httpbin.org/delay/2')
.then(function(response) {
$scope.responseOne = response.data;
});
};
$scope.makeRequestTwo = function() {
$http
.get('https://httpbin.org/delay/4')
.then(function(response) {
$scope.responseTwo = response.data;
});
};
});
</script>
</head>
<body ng-controller="appCtrl">
<h1>Hello Plunker!</h1>
<button
ng-click="makeRequestOne()"
ng-disabled="pending">Request One</button>
<button
ng-click="makeRequestTwo()">Request Two</button>
<hr>
<pre>{{ responseOne }}</pre>
<pre>{{ responseTwo }}</pre>
</body>
</html>
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