plunker

问题： I've got the following error when launching my Angular app, even if the component is not displayed. 即使未显示组件，启动我的Angular应用程序时也会出现以下错误。 I have to comment out the <input> so that my app works. 我必须注释掉 <input> 这样我的应用才能正常工作。 zone.js:461 Unhandled Promise rejection: Template parse errors: Can't bind to 'ngModel' since it isn't a known property of 'input'. (" <div> <label>Created:</label> <input type="text" [ERROR ->][(ngModel)]="test" placeholder="foo" /> </div> </div>"): InterventionDetails@4:28 ; Zone: <root> ; Task: Promise.then ; Value: I'm looking at the Hero plunker, but I don't see any

问题： I've got the following error when launching my Angular app, even if the component is not displayed. 即使未显示组件，启动我的Angular应用程序时也会出现以下错误。 I have to comment out the <input> so that my app works. 我必须注释掉 <input> 这样我的应用才能正常工作。 zone.js:461 Unhandled Promise rejection: Template parse errors: Can't bind to 'ngModel' since it isn't a known property of 'input'. (" <div> <label>Created:</label> <input type="text" [ERROR ->][(ngModel)]="test" placeholder="foo" /> </div> </div>"): InterventionDetails@4:28 ; Zone: <root> ; Task: Promise.then ; Value: I'm looking at the Hero plunker, but I don't see any

问题： I've got the following error when launching my Angular app, even if the component is not displayed. 即使未显示组件，启动我的Angular应用程序时也会出现以下错误。 I have to comment out the <input> so that my app works. 我必须注释掉 <input> 这样我的应用才能正常工作。 zone.js:461 Unhandled Promise rejection: Template parse errors: Can't bind to 'ngModel' since it isn't a known property of 'input'. (" <div> <label>Created:</label> <input type="text" [ERROR ->][(ngModel)]="test" placeholder="foo" /> </div> </div>"): InterventionDetails@4:28 ; Zone: <root> ; Task: Promise.then ; Value: I'm looking at the Hero plunker, but I don't see any

我正在使用Angular 2（TypeScript）。 我想为新选择做点什么，但是我在onChange（）中得到的始终是最后一个选择。 如何获得新的选择？ <select [(ngModel)]="selectedDevice" (change)="onChange($event)"> <option *ngFor="#i of devices">{{i}}</option> </select> onChange($event) { console.log(this.selectedDevice); // I want to do something here for new selectedDevice, but what I // got here is always last selection, not the one I just select. } #1楼 您可以通过选择标记创建一个参考变量传递值回组件 #device 并将其传递到更改处理 onChange($event, device.value) 应该具有新的价值 <select [(ng-model)]="selectedDevice" #device (change)="onChange($event, device.value)"> <option *ng-for="#i of devices">{{i}}<