Angular 2键盘事件 | 码农家园

Angular 2 Keyboard Events

尝试使用typescript用angular2监视键盘事件，angular2创建全局键盘快捷键(又称热键)的方式是什么？有帮助，但tslint(codelyzer)对象带有消息

In the"@Component" class decorator you are using the"host"
property, this is considered bad practice. Use"@HostBindings",
"@HostListeners" property decorator instead.

如何使用推荐的装饰师？我不确定Angular2中的示例：主机绑定和主机监听如何应用于我的用例，因为我没有绑定到任何DOM元素。

这是我的演示

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@Component({
selector: 'my-app',
template: `

Keyboard Event demo
Start typing to see KeyboardEvent values

<hr />
KeyboardEvent

<ul>

<li>
altKey: {{altKey}}
</li>

<li>
charCode: {{charCode}}
</li>

<li>
code: {{code}}
</li>

<li>
ctrlKey: {{ctrlKey}}
</li>

<li>
keyCode: {{keyCode}}
</li>

<li>
keyIdentifier: {{keyIdentifier}}
</li>

<li>
metaKey: {{metaKey}}
</li>

<li>
shiftKey: {{shiftKey}}
</li>

<li>
timeStamp: {{timeStamp}}
</li>

<li>
type: {{type}}
</li>

<li>
which: {{which}}
</li>

</ul>

`,
host: { '(window:keydown)': 'keyboardInput($event)' }
/*
In the"@Component" class decorator you are using the"host" property, this is considered bad practice.
Use"@HostBindings","@HostListeners" property decorator instead.
*/

})
export class App {

/* a few examples */
keyboardEvent: any;
altKey: boolean;
charCode: number;
code: string;
ctrlKey: boolean;
keyCode: number;
keyIdentifier: string;
metaKey: boolean;
shiftKey: boolean;
timeStamp: number;
type: string;
which: number;

keyboardInput(event: any) {
event.preventDefault();
event.stopPropagation();

this.keyboardEvent = event;
this.altKey = event.altKey;
this.charCode = event.charCode;
this.code = event.code;
this.ctrlKey = event.ctrlKey;
this.keyCode = event.keyCode;
this.keyIdentifier = event.keyIdentifier;
this.metaKey = event.metaKey;
this.shiftKey = event.shiftKey;
this.timeStamp = event.timeStamp;
this.type = event.type;
this.which = event.which;
}

}

https://plnkr.co/edit/aubybjbkp7p8fpxqm0zx