AngularJS 禁用键的方法

AngularJS way to disable a key

在我的 AngularJs 项目中,我想禁用所有视图的退格键。这是一个简单的 jQuery 解决方案。在AngularJs?

中有什么解决方案吗?
$(document).on("keydown", function (e) {
    if (e.which === 8 && !$(e.target).is("input, textarea")) {
        e.preventDefault();
    }
});

此致

您可以将 ng-keydown 属性添加到您的 <input> 标签:

<input type="text" ng-keydown="checkKey($event)"/>

$scope.checkKey(keyEvent) {
    if (keyEvent.which === 13) { 
        $event.preventDefault();
    }
}

使用$document Service

$document.on("keydown", function (e) {
    if (e.which === 8 && !$(e.target).is("input, textarea")) {
        e.preventDefault();
    }
});

$document service has methods which are a subset of jQuery called jqLite


How can apply this code? My starting app is like angular.module("my_app", ['ngRoute']);

放在运行块中:

angular.module("my_app").run(function($document) {

    $document.on("keydown", function keydown Handler(e) {
        //Put handler code here
    });

});

!$(e.target).is("input, textarea")

可以翻译:

(e.target.type == "input") || (e.target.type == "textarea");

如果你想禁用整个网站的退格键,你可以使用类似的东西()并使用 $document.[=13 将指令应用于正文文档=]

像这样:

angular.module('app', []).directive('muteKey', ['$document', function($document) {
  return function(scope, element, attrs) {
    $document.on("keydown", function(e) {
     /*
      * you don't need the $(e.target) if you want to
      * disable the key press in any place of the project
      * and not just for inputs or textareas
      */
      if (e.which === 8) {
        e.preventDefault();
      }
    });
  };
}]);

<body mute-key>
    <!---->
</body>