无法读取未定义的属性 'schedule'

Question

所需的输出是 BsDatePicker 并且出于某种原因给我错误：无法读取属性 'schedule' of undefined.
并且还有警告 BsDatepickerModule is under development, 突破性的改变是可能的，请阅读更新日志

Angular-CLI 版本 1.7.4，ngx-bootstrap 版本 3.0.0，Angular 5

这是 html 的代码：
<input type="text" [(ngModel)]="dateOfBirth" name="dateOfBirth" id="dateOfBirth" bsDatepicker class="form-control"/>

这是 app.module.ts 的代码：

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { BsDatepickerModule } from 'ngx-bootstrap/datepicker';
import { AppRoutingModule } from './app-routing.module';

import { AppComponent } from './app.component';
import { HomeComponent } from './home/home.component';
import { PageNotFoundComponent } from './page-not-found/page-not-found.component';
import { CreateEmployeeComponent } from './employee/create-employee/create-employee.component';


@NgModule({
  declarations: [
    AppComponent,
    HomeComponent,
    CreateEmployeeComponent,
    PageNotFoundComponent 
  ],
  imports: [
    BrowserModule,
    FormsModule,
    BsDatepickerModule.forRoot(),
    AppRoutingModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

这是我的应用程序-routing.module.ts

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { HomeComponent } from './home/home.component';
import { PageNotFoundComponent } from './page-not-found/page-not-found.component';
import { CreateEmployeeComponent } from './employee/create-employee/create-employee.component';

const routes: Routes = [
   { path : 'home' , component : HomeComponent},
   { path : 'createEmployee', component : CreateEmployeeComponent},
   { path : '', redirectTo: '/home', pathMatch : 'full'},
   { path : '**', component: PageNotFoundComponent}
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

这是我的。angular-cli.json

..."testTsconfig": "tsconfig.spec.json",
      "prefix": "app",
      "styles": [
        "../node_modules/bootstrap/dist/css/bootstrap.min.css",
        "../node_modules/ngx-bootstrap/datepicker/bs-datepicker.css",
        "styles.css"
      ],
      "scripts": [
        "../node_modules/jquery/dist/jquery.slim.min.js",
        "../node_modules/popper.js/dist/umd/popper.min.js",
        "../node_modules/bootstrap/dist/js/bootstrap.min.js"
      ],
      "environmentSource": "environments/environment.ts",...

Answer 1

我认为 ngx-bootstrap 3.0.0 不是稳定版本。正如您在他们的文档站点中看到的那样。最新的稳定版本是 2.0.5。 document site 但是当你尝试通过命令安装它时：

npm install ngx-bootstrap --save

此命令将尝试获取最新版本 3.0.0。所以，原因很简单，3.0.0目前还不是稳定版

Answer 2

版本 3.0.0 不稳定。获取最新的稳定版本 2.0.5

以下步骤有效。

rm -rf node_modules/ngx-bootstrap

package.json : "ngx-bootstrap": "^3.0.0" 到 "ngx-bootstrap": "2.0.5",

npm install ngx-bootstrap

Answer 3

我尝试了上述解决方案，对我来说效果很好

以下步骤：

package.json : "ngx-bootstrap": "^3.0.0" 到 "ngx-bootstrap": "2.0.5",

npm 安装 ngx-bootstrap

运行服务器再次：ng serve

Answer 4

执行以下步骤即可解决问题：

Step 1: npm uninstall ngx-bootstrap

Step 2: npm install ngx-bootstrap@2.0.5 --save 

Step 3: ng serve

Step 4: Add the css file path "../node_modules/ngx-bootstrap/datepicker/bs-datepicker.css" in styles array in angular-cli.json file

无法读取未定义的属性 'schedule'

Cannot read property 'schedule' of undefined

web-frontend

ngx-bootstrap

angular

angular5

无法读取未定义的 属性 'schedule'

Cannot read property 'schedule' of undefined

web-frontend

ngx-bootstrap

angular

angular5

无法读取未定义的属性 'schedule'