我正在尝试在angularjs 2中使用toastr作为服务,将在我的组件中注入,如下所述.当调用handleEvent函数时,我正在接收“无法读取未定义的属性’扩展’”.非常感谢对错误的任何建议和/或解释.
app.moudle.ts已导入ToastrService,并且已在提供程序中添加ToastrService.
//events/events-list.components.ts
import { ToastrService } from '../common/toastr.service';
@Component ({
selector: 'event-list',
template: `
<div>
<h1> Upcoming Angular 2 Event </h1>
<hr>
<div class="row">
<div *ngFor="let event_data of all_data" class="col-md-5">
<event-thumbnail (click)="handleEvent(event_data.name)" [event]="event_data"></event-thumbnail>
</div>
</div>
</div>
`
})
export class EventListComponent implements OnInit {
all_data:any[]
constructor(private eventService : EventService , private toastr : ToastrService ){
//moved code from here to ngOnInit
}
ngOnInit(){
this.all_data = this.eventService.getEvents();
}
handleEvent(eventName) {
console.log("hey here "+eventName);
this.toastr.success(eventName);
}
}
错误:
[在console.log输出后抛出此错误]
EXCEPTION: Error in ./EventListComponent class EventListComponent –
inline template:6:16 caused by: Cannot read property ‘extend’ of
undefined.
ORIGINAL EXCEPTION: Cannot read property ‘extend’ of undefined
TypeError: Cannot read property ‘extend’ of undefined
at m (toastr.js:411)
at Object.s [as success] (toastr.js:85)
at ToastrService.success (toastr.service.ts:12)
解决方法:
加上这个
script src =“node_modules / toastr / build / toastr.min.js”
在这之后
script src =“node_modules / jquery / dist / jquery.min.js”>< / script>
原因:toastr.js使用jQuery,因此jQuery应该在toastr.js之前加载
原文地址:https://codeday.me/bug/20190711/1435243.html
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