尝试使用嵌套组件时未承诺的异常

Question

我在尝试使用嵌套组件时遇到此异常:

EXCEPTION: Error: Uncaught (in promise): TypeError: Cannot set property 'endSourceSpan' of null
XCEPTION: Error: Uncaught (in promise): TypeError: Cannot set property 'endSourceSpan' of nullBrowserDomAdapter.logError @ angular2.dev.js:23877BrowserDomAdapter.logGroup @ angular2.dev.js:23888ExceptionHandler.call @ angular2.dev.js:1317(anonymous function) @ angular2.dev.js:12763schedulerFn @ angular2.dev.js:13167SafeSubscriber.__tryOrUnsub @ Rx.js:10775SafeSubscriber.next @ Rx.js:10730Subscriber._next @ Rx.js:10690Subscriber.next @ Rx.js:10667Subject._finalNext @ Rx.js:11191Subject._next @ Rx.js:11183Subject.next @ Rx.js:11142EventEmitter.emit @ angular2.dev.js:13148NgZone._zoneImpl.ng_zone_impl_1.NgZoneImpl.onError @ angular2.dev.js:13566NgZoneImpl.inner.inner.fork.onHandleError @ angular2.dev.js:2128ZoneDelegate.handleError @ angular2-polyfills.js:336Zone.runGuarded @ angular2-polyfills.js:244drainMicroTaskQueue @ angular2-polyfills.js:495ZoneTask.invoke @ angular2-polyfills.js:434
angular2.dev.js:23877 STACKTRACE:BrowserDomAdapter.logError @ angular2.dev.js:23877ExceptionHandler.call @ angular2.dev.js:1319(anonymous function) @ angular2.dev.js:12763schedulerFn @ angular2.dev.js:13167SafeSubscriber.__tryOrUnsub @ Rx.js:10775SafeSubscriber.next @ Rx.js:10730Subscriber._next @ Rx.js:10690Subscriber.next @ Rx.js:10667Subject._finalNext @ Rx.js:11191Subject._next @ Rx.js:11183Subject.next @ Rx.js:11142EventEmitter.emit @ angular2.dev.js:13148NgZone._zoneImpl.ng_zone_impl_1.NgZoneImpl.onError @ angular2.dev.js:13566NgZoneImpl.inner.inner.fork.onHandleError @ angular2.dev.js:2128ZoneDelegate.handleError @ angular2-polyfills.js:336Zone.runGuarded @ angular2-polyfills.js:244drainMicroTaskQueue @ angular2-polyfills.js:495ZoneTask.invoke @ angular2-polyfills.js:434
angular2.dev.js:23877 Error: Uncaught (in promise): TypeError: Cannot set property 'endSourceSpan' of null
    at resolvePromise (angular2-polyfills.js:543)
    at angular2-polyfills.js:520
    at ZoneDelegate.invoke (angular2-polyfills.js:332)
    at Object.NgZoneImpl.inner.inner.fork.onInvoke (angular2.dev.js:2111)
    at ZoneDelegate.invoke (angular2-polyfills.js:331)
    at Zone.run (angular2-polyfills.js:227)
    at angular2-polyfills.js:576
    at ZoneDelegate.invokeTask (angular2-polyfills.js:365)
    at Object.NgZoneImpl.inner.inner.fork.onInvokeTask (angular2.dev.js:2103)
    at ZoneDelegate.invokeTask (angular2-polyfills.js:364)BrowserDomAdapter.logError @ angular2.dev.js:23877ExceptionHandler.call @ angular2.dev.js:1320(anonymous function) @ angular2.dev.js:12763schedulerFn @ angular2.dev.js:13167SafeSubscriber.__tryOrUnsub @ Rx.js:10775SafeSubscriber.next @ Rx.js:10730Subscriber._next @ Rx.js:10690Subscriber.next @ Rx.js:10667Subject._finalNext @ Rx.js:11191Subject._next @ Rx.js:11183Subject.next @ Rx.js:11142EventEmitter.emit @ angular2.dev.js:13148NgZone._zoneImpl.ng_zone_impl_1.NgZoneImpl.onError @ angular2.dev.js:13566NgZoneImpl.inner.inner.fork.onHandleError @ angular2.dev.js:2128ZoneDelegate.handleError @ angular2-polyfills.js:336Zone.runGuarded @ angular2-polyfills.js:244drainMicroTaskQueue @ angular2-polyfills.js:495ZoneTask.invoke @ angular2-polyfills.js:434
angular2-polyfills.js:469 Unhandled Promise rejection: Cannot set property 'endSourceSpan' of null ; Zone: angular ; Task: Promise.then ; Value: TypeError: Cannot set property 'endSourceSpan' of null(…)consoleError @ angular2-polyfills.js:469drainMicroTaskQueue @ angular2-polyfills.js:498ZoneTask.invoke @ angular2-polyfills.js:434
angular2-polyfills.js:471 Error: Uncaught (in promise): TypeError: Cannot set property 'endSourceSpan' of null(…)consoleError @ angular2-polyfills.js:471drainMicroTaskQueue @ angular2-polyfills.js:498ZoneTask.invoke @ angular2-polyfills.js:434

这是我的主要组件的代码:

<base-menu [menu-items-list]="menuList" [menu-layer]="layer"
    (select-menu-item)="selectMenuItem($event)"
    (add-new-item)="addMenuItem($event)"></base-menu>

import {BaseMenuComponent} from '../../../../components/menuComponent/baseMenuComponent/baseMenuComponent';

let applicationPath: string = '/app/pages/adminPage/categoriesPage/requestsPage';

@Component({
    selector: 'companies-Page',
    templateUrl: applicationPath + '/requestsPage.html',
    styleUrls:[ applicationPath + '/requestsPage.css'],
    providers:[RequestTypeService, HTTP_PROVIDERS], 
    directives:[BaseMenuComponent]
})
export class RequestsPage implements OnInit {
    requestTypes:Array<RequestType> = new Array();
    searchQuery: string = "";
    menuList = [
        {id:12, layer:0, name:'asd'},
        {id:13, layer:0, name:'asda'},
        {id:14, layer:0, name:'asdd'}];
    layer = 0;
    _requestTypeService:RequestTypeService

    constructor(requestTypeService:RequestTypeService) {
        this._requestTypeService = requestTypeService;
    }

    ngOnInit(){
        //this.getRequestTypesWithFilters();
    }
}

这是子组件:

import {Component, Input, Output, EventEmitter, OnInit} from 'angular2/core';

@Component({
    selector: 'base-menu',
    //templateUrl: '/app/components/menuComponent/baseMenuComponent/baseMenuComponent.html'
    template:`
    <div class="base-menu-component">
        <ul class="nav nav-pills nav-stacked">
            <li class="form-group row">
                <input class="form-control" [(ngModel)]="newMenuItem"/>
                <button class="btn btn-success" (click)="addMenuItem()">
                    <span class="glyphicon glyphicon-plus"></span>
                </button>
                <button class="btn btn-success" (click)="clearMenuItem()">
                    <span class="glyphicon glyphicon-remove"></span>
                </button>
            </li>
            <li *ngFor="#item of menuItems" [class]="isItemSelected(item) ? 'active':''" (click)="selectItem(item)">
                <a>{{item.name}}</a>
            </li>
        </ul>
    </div>`
})

export class BaseMenuComponent implements OnInit {
    @Input('menu-items-list') menuItemsList:Array<MenuItem>;
    @Input('menu-layer') menuLayer:number;
    @Output('select-menu-item') broadcastMenuItem: EventEmitter<MenuData> = new EventEmitter<MenuData>();
    @Output('add-new-item') broadcastNewItem: EventEmitter<MenuData> = new EventEmitter<MenuData>();

    selectedItem:MenuItem;
    newMenuItem:string;

    constructor() { }

    ngOnInit(){
        this.selectedItem = this.menuItemsList && this.menuItemsList.length > 0 ? this.menuItemsList[0] : null;
        this.newMenuItem = "";
    }

    isItemSelected(menuItem){
        return this.selectedItem == menuItem;
    }

    selectItem(menuItem){
        this.selectedItem = menuItem;
        this.broadcastMenuItem.emit({menuItem:menuItem, menuLayer:this.menuLayer});
    }

    addMenuItem(){
        this.broadcastNewItem.emit({menuItem:this.newMenuItem, menuLayer:this.menuLayer});
        this.clearMenuItem();
    }

    clearMenuItem(){
        this.newMenuItem = "";
    }
}

interface MenuItem{
    id;
    layer;
    parentId;
    name;
}

interface MenuData{
    menuItem;
    menuLayer;
}

有人可以解释我这个错误在哪里以及它出现的原因？
对我来说,html和两个组件看起来都很清晰.

Answer 1

我确实有一个类似的问题,原因不同:

我使用angular-cli构建了一个小应用程序,当创建组件的html时,它具有如下内容:

<p>
   Component works !
</p>

所以我做的是测试我的组件:

<p>
   Component works !

   <div *ngFor="#value in values">
      {{value}}
   </div>
</p>

但随后错误出现了.

这只是因为一个段落不能包含像(div,h1,ul等)这样的块元素.

这么多时间只是为了发现......

当我做

 <div>
    Component works !

    <div *ngFor="#value in values">
       {{value}}
    </div>
 </div>

它工作正常;)

Answer 2

也可能意味着你错过了收盘双重报价

<div (click)="myClick()>What's up with my CODE!???</div>

Answer 3

我有类似的问题.我收到的错误是"EXCEPTION:TypeError:无法设置属性'endSourceSpan'为null"(见下图).在我的模板中,我错过了div的结尾">"(见下图).一旦我添加了">",错误便消失了.

我相信Angular 2模板中任何格式错误的HTML都会出现此错误.

Answer 4

<xxx />xxx如果是 void 元素则有效

区域、基础、br、col、命令、嵌入、hr、img、输入、注册机、链接、元、参数、源、轨道、wbr

https://www.w3.org/TR/html-markup/syntax.html#syntax-elements

不，没关系，我发现这个错误是在 html 中的一个未关闭的 div 中，

缺少关闭<div>它。

大概

<input class="form-control" [(ngModel)]="newMenuItem"/>

/>不是有效的 HTML5。Angular 对于传递给 Angular 的 HTML 非常严格。

<input>

标记省略 必须有开始标记，并且不得有结束标记。

将其更改为

<input class="form-control" [(ngModel)]="newMenuItem">