angularjsHow can I use AngularJS to detect a keypress event?
To detect a keypress event using AngularJS, you can use the ng-keydown
directive. ng-keydown
takes an expression to evaluate upon keydown event.
For example, the following code will log the keycode of the pressed key when a key is pressed.
<div ng-app="myApp" ng-controller="myCtrl">
<input type="text" ng-keydown="keydown($event)">
</div>
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
$scope.keydown = function($event){
console.log($event.keyCode);
}
});
</script>
Output example
<keycode>
The code consists of the following parts:
-
<div ng-app="myApp" ng-controller="myCtrl">
- This defines the scope of the AngularJS application. -
<input type="text" ng-keydown="keydown($event)">
- This defines the directiveng-keydown
which takes an expression to evaluate upon keydown event. In this case, the expression iskeydown($event)
. -
app.controller('myCtrl', function($scope) {
- This defines the controllermyCtrl
which is used to define the scope of the application. -
$scope.keydown = function($event){
- This defines the functionkeydown
which is used to log the keycode of the pressed key. -
console.log($event.keyCode);
- This logs the keycode of the pressed key.
Helpful links
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