錯誤：（SystemJS）無法解析MultiselectDropdown的所有參數：（？，？）

Question

我正在使用版本1.0.2的angular-2-dropdown-multiselect。

在HTML

<ss-multiselect-dropdown [options]="users" [texts]="userDropdownTexts" [settings]="userDropdownSettings" [(ngModel)]="selectedUsers" 
        name="selectedUsers" required></ss-multiselect-dropdown> 

控制器

import語句

import { IMultiSelectOption, IMultiSelectSettings, IMultiSelectTexts } from 'angular-2-dropdown-multiselect'; 

組件類

export class MyComponent implements OnInit { 

    userDropdownSettings: IMultiSelectSettings; 
    userDropdownTexts: IMultiSelectTexts; 

    // object for multi-select drop down 
    private users: Array<any> = []; 

    selectedUsers: number[]; 

    ngOnInit() { 
     this.userDropdownSettings = { 
      pullRight: false, 
      enableSearch: true, 
      checkedStyle: 'checkboxes', 
      buttonClasses: 'btn btn-default', 
      selectionLimit: 0, 
      closeOnSelect: false, 
      showCheckAll: false, 
      showUncheckAll: false, 
      dynamicTitleMaxItems: 4, 
      maxHeight: '170px', 
     }; 

     this.userDropdownTexts = { 
      checkAll: 'Check all', 
      uncheckAll: 'Uncheck all', 
      checked: 'checked', 
      checkedPlural: 'checked', 
      searchPlaceholder: 'Search...', 
      defaultTitle: 'Select Users', 
     }; 
} 

一切工作正常。我從1.0.2這個庫更新到1.0.3現在這正顯示出

Error: (SystemJS) Can't resolve all parameters for MultiselectDropdown: (?, ?). 
    Error: Can't resolve all parameters for MultiselectDropdown: (?, ?). 
     at SyntaxError.BaseError [as constructor] (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:1595:29) [<root>] 
     at new SyntaxError (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:1793:18) [<root>] 
     at CompileMetadataResolver._getDependenciesMetadata (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:18458:33) [<root>] 
     at CompileMetadataResolver._getTypeMetadata (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:18333:28) [<root>] 
     at CompileMetadataResolver.getNonNormalizedDirectiveMetadata (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:17973:26) [<root>] 
     at CompileMetadataResolver._loadDirectiveMetadata (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:17849:25) [<root>] 
     at eval (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:18050:56) [<root>] 
     at Array.forEach (native) [<root>] 
     at CompileMetadataResolver.loadNgModuleDirectiveAndPipeMetadata (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:18049:43) [<root>] 
     at eval (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:27290:60) [<root>] 
     at Array.forEach (native) [<root>] 
     at JitCompiler._loadModules (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:27289:45) [<root>] 
     at JitCompiler._compileModuleAndComponents (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:27244:54) [<root>] 
     at JitCompiler.compileModuleAsync (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:27210:23) [<root>] 
    Evaluating http://localhost:3000/app/index.js 
    Error loading http://localhost:3000/app/index.js 
     at SyntaxError.BaseError [as constructor] (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:1595:29) [<root>] 
     at new SyntaxError (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:1793:18) [<root>] 
     at CompileMetadataResolver._getDependenciesMetadata (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:18458:33) [<root>] 
     at CompileMetadataResolver._getTypeMetadata (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:18333:28) [<root>] 
     at CompileMetadataResolver.getNonNormalizedDirectiveMetadata (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:17973:26) [<root>] 
     at CompileMetadataResolver._loadDirectiveMetadata (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:17849:25) [<root>] 
     at eval (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:18050:56) [<root>] 
     at Array.forEach (native) [<root>] 
     at CompileMetadataResolver.loadNgModuleDirectiveAndPipeMetadata (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:18049:43) [<root>] 
     at eval (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:27290:60) [<root>] 
     at Array.forEach (native) [<root>] 
     at JitCompiler._loadModules (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:27289:45) [<root>] 
     at JitCompiler._compileModuleAndComponents (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:27244:54) [<root>] 
     at JitCompiler.compileModuleAsync (http://localhost:3000/node_modules/@angular/compiler/bundles/compiler.umd.js:27210:23) [<root>] 
    Evaluating http://localhost:3000/app/index.js 
    Error loading http://localhost:3000/app/index.js 

可能是什麼問題？

Answer 1

我更新了庫到版本1.0.4，現在它工作正常。圖書館本身可能存在問題。

下面是與此相關的

https://github.com/softsimon/angular-2-dropdown-multiselect/issues/102#event-1009144997