问Angular 2- Bootstrap (Ng2-Bootstrap) typeahead实现

EN

import {Component} from "angular2/core";
import {CORE_DIRECTIVES, FORM_DIRECTIVES} from 'angular2/common';
import {TYPEAHEAD_DIRECTIVES} from 'ng2-bootstrap';
@Component({
selector: "side-bar",
directives: [TYPEAHEAD_DIRECTIVES, CORE_DIRECTIVES, FORM_DIRECTIVES],
template: `
<div class="searchArea" [ngClass]="{searchAreaForceLargeWidth: forceShowSearch}">
   <form class="searchBlock" [ngClass]="{searchBlockForceShow: forceShowSearch}">
        <div class="form-group">
       <input [(ngModel)]="asyncSelected"
       [typeahead]="getAsyncData(getContext())"
       (typeaheadLoading)="changeTypeaheadLoading($event)"
       (typeaheadNoResults)="changeTypeaheadNoResults($event)"
       (typeaheadOnSelect)="typeaheadOnSelect($event)"
       [typeaheadOptionsLimit]="7"
       placeholder="Locations loaded with timeout"
       class="form-control">
        </div>
   </form>
</div>
`,
})
export class SideBarComponent {
forceShowSearch = false;
showCalendar = false;
dateFrom = "01/01/2023";
doSearch;

///////////
private selected: string = '';
private asyncSelected: string = '';
private typeaheadLoading: boolean = false;
private typeaheadNoResults: boolean = false;
private states: Array<string> = ['Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California', 'Colorado',
    'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii', 'Idaho', 'Illinois', 'Indiana', 'Iowa',
    'Kansas', 'Kentucky', 'Louisiana', 'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota',
    'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire', 'New Jersey', 'New Mexico',
    'New York', 'North Dakota', 'North Carolina', 'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island',
    'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont', 'Virginia', 'Washington',
    'West Virginia', 'Wisconsin', 'Wyoming'];
private statesComplex: Array<any> = [
    { id: 1, name: 'Alabama' }, { id: 2, name: 'Alaska' }, { id: 3, name: 'Arizona' },
    { id: 4, name: 'Arkansas' }, { id: 5, name: 'California' },
    { id: 6, name: 'Colorado' }, { id: 7, name: 'Connecticut' },
    { id: 8, name: 'Delaware' }, { id: 9, name: 'Florida' },
    { id: 10, name: 'Georgia' }, { id: 11, name: 'Hawaii' },
    { id: 12, name: 'Idaho' }, { id: 13, name: 'Illinois' },
    { id: 14, name: 'Indiana' }, { id: 15, name: 'Iowa' },
    { id: 16, name: 'Kansas' }, { id: 17, name: 'Kentucky' },
    { id: 18, name: 'Louisiana' }, { id: 19, name: 'Maine' },
    { id: 21, name: 'Maryland' }, { id: 22, name: 'Massachusetts' },
    { id: 23, name: 'Michigan' }, { id: 24, name: 'Minnesota' },
    { id: 25, name: 'Mississippi' }, { id: 26, name: 'Missouri' },
    { id: 27, name: 'Montana' }, { id: 28, name: 'Nebraska' },
    { id: 29, name: 'Nevada' }, { id: 30, name: 'New Hampshire' },
    { id: 31, name: 'New Jersey' }, { id: 32, name: 'New Mexico' },
    { id: 33, name: 'New York' }, { id: 34, name: 'North Dakota' },
    { id: 35, name: 'North Carolina' }, { id: 36, name: 'Ohio' },
    { id: 37, name: 'Oklahoma' }, { id: 38, name: 'Oregon' },
    { id: 39, name: 'Pennsylvania' }, { id: 40, name: 'Rhode Island' },
    { id: 41, name: 'South Carolina' }, { id: 42, name: 'South Dakota' },
    { id: 43, name: 'Tennessee' }, { id: 44, name: 'Texas' },
    { id: 45, name: 'Utah' }, { id: 46, name: 'Vermont' },
    { id: 47, name: 'Virginia' }, { id: 48, name: 'Washington' },
    { id: 49, name: 'West Virginia' }, { id: 50, name: 'Wisconsin' },
    { id: 51, name: 'Wyoming' }];
private getContext() {
    return this;
}

private _cache: any;
private _prevContext: any;

private getAsyncData(context: any): Function {
    if (this._prevContext === context) {
        return this._cache;
    }

    this._prevContext = context;
    let f: Function = function(): Promise<string[]> {
        let p: Promise<string[]> = new Promise((resolve: Function) => {
            setTimeout(() => {
                let query = new RegExp(context.asyncSelected, 'ig');
                return resolve(context.states.filter((state: any) => {
                    return query.test(state);
                }));
            }, 200);
        });
        return p;
    };
    this._cache = f;
    return this._cache;
}

private changeTypeaheadLoading(e: boolean) {
    this.typeaheadLoading = e;
}

private changeTypeaheadNoResults(e: boolean) {
    this.typeaheadNoResults = e;
}

private typeaheadOnSelect(e: any) {
    console.log(`Selected value: ${e.item}`);
}
//////////

constructor() {
    this.doSearch = function() {
        //this.forceShowSearch = false;
        console.log("Search");
    };
}
}

angular2-polyfills.js:1243 SyntaxError: Unexpected token <
Evaluating http://localhost:3000/ng2-bootstrap
Error loading http://localhost:3000/app/main.js
at SystemJSLoader.__exec (http://localhost:3000/node_modules/systemjs/dist/system.src.js:1395:16)
at entry.execute (http://localhost:3000/node_modules/systemjs/dist/system.src.js:3521:16)
at linkDynamicModule (http://localhost:3000/node_modules/systemjs/dist/system.src.js:3126:32)
at link (http://localhost:3000/node_modules/systemjs/dist/system.src.js:2969:11)
at Object.execute (http://localhost:3000/node_modules/systemjs/dist/system.src.js:3301:13)
at doDynamicExecute (http://localhost:3000/node_modules/systemjs/dist/system.src.js:703:25)
at link (http://localhost:3000/node_modules/systemjs/dist/system.src.js:905:20)
at doLink (http://localhost:3000/node_modules/systemjs/dist/system.src.js:557:7)
at updateLinkSetOnLoad (http://localhost:3000/node_modules/systemjs/dist/system.src.js:605:18)
at http://localhost:3000/node_modules/systemjs/dist/system.src.js:417:11