Angular2:从JavaScript函数调用组件方法

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当前，我正在尝试在我的Angular2项目中使用jQuery来实现引导日期选择器.这是我到目前为止的内容:

Currently I'm trying to implement bootstrap datepicker, which using jQuery, with my Angular2 project. Here is what I have so far:

import {Component, AfterViewInit, Injector, Inject} from '@angular/core'; import {ObservableService} from "../../../services/data-observable.service"; declare var $:any; @Component({ selector: 'date-range', moduleId: module.id, template: `<input name="daterange" class="filter-date-range"/>` }) export class DateRange implements AfterViewInit { options = { locale: { format: 'YYYY-MM-DD' }, startDate: '2013-01-01', endDate: '2013-12-31'}; constructor(@Inject(Injector) private injector: Injector, @Inject(ObservableService) private _observable: ObservableService) { } ngAfterViewInit() { $('input[name="daterange"]').daterangepicker( this.options, function (start, end) { let obj = {}; obj['start'] = start; obj['end'] = end; this._observable.updateFilter(obj); } ); } }

除这段代码外，一切工作都很完美

Everything works perfect, except this piece of code

this._observable.updateFilter(obj);

在这里，我试图将ObservableService方法调用的路径传递到daterangepicker回调函数中，该函数在每次更改日期值时都会激活.所以，我得到了

Here I'm trying to path ObservableService method call into daterangepicker callback function, which activates each time date value changed. So, I'm getting a

Uncaught TypeError: Cannot read property 'updateFilter' of undefined

错误.

如何调用Angular2组件，服务或js函数内部的任何方法?

How can I call a method of Angular2 component, service or whatever inside js function?

推荐答案

在回调中使用箭头功能:

Use arrow function in callback:

$('input[name="daterange"]').daterangepicker( this.options, (start, end) => { let obj = {}; obj['start'] = start; obj['end'] = end; this._observable.updateFilter(obj); } );

或使用Function的bind方法:

Or use bind method of Function:

$('input[name="daterange"]').daterangepicker( this.options, function (start, end) { let obj = {}; obj['start'] = start; obj['end'] = end; this._observable.updateFilter(obj); }.bind(this); );