Flex-layout: Error: can't import module with Angular 4.0

Created on 6 Jun 2017 · 15Comments · Source: angular/flex-layout

Hello,

I followed the installation manual for angular-cli but I can not import the module into my application. I get the following error:
Unexpected value 'undefined' imported by the module 'AppModule'

If I put it in the module where I'm going to use it, it also gives me a similar error.

packge.json dependecies:

"dependencies": {
    "@angular/cli": "1.0.2",
    "@angular/compiler-cli": "^4.0.0",
    "@angular/animations": "^4.0.0",
    "@angular/material": "^2.0.0-beta.5",
    "@angular/common": "^4.0.0",
    "@angular/compiler": "^4.0.0",
    "@angular/core": "^4.0.0",
    "@angular/flex-layout": "^2.0.0-beta.8",
    "@angular/forms": "^4.0.0",
    "@angular/http": "^4.0.0",
    "@angular/platform-browser": "^4.0.0",
    "@angular/platform-browser-dynamic": "^4.0.0",
    "@angular/router": "^4.0.0",
    "@swimlane/ngx-datatable": "^9.2.0",
    "angular-load": "^0.5.0",
    "core-js": "^2.4.1",
    "ng2-bs3-modal": "^0.10.4",
    "rxjs": "^5.1.0",
    "zone.js": "^0.8.4"
  },
  "devDependencies": {
    "@ng-bootstrap/ng-bootstrap": "^1.0.0-alpha.26",
    "@types/jasmine": "2.5.38",
    "@types/node": "~6.0.60",
    "@types/systemjs": "^0.20.2",
    "autoprefixer": "^6.5.3",
    "codelyzer": "~2.0.0",
    "css-loader": "^0.27.3",
    "cssnano": "^3.10.0",
    "exports-loader": "^0.6.3",
    "file-loader": "^0.10.0",
    "istanbul-instrumenter-loader": "^2.0.0",
    "jasmine-core": "~2.5.2",
    "jasmine-spec-reporter": "~3.2.0",
    "json-loader": "^0.5.4",
    "karma": "~1.4.1",
    "karma-chrome-launcher": "~2.0.0",
    "karma-cli": "~1.0.1",
    "karma-coverage-istanbul-reporter": "^0.2.0",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "karma-requirejs": "^1.1.0",
    "karma-sourcemap-loader": "^0.3.7",
    "karma-webpack": "^2.0.3",
    "less-loader": "^4.0.2",
    "postcss-loader": "^1.3.3",
    "postcss-url": "^5.1.2",
    "protractor": "~5.1.0",
    "raw-loader": "^0.5.1",
    "sass-loader": "^6.0.3",
    "script-loader": "^0.7.0",
    "source-map-loader": "^0.1.5",
    "style-loader": "^0.13.1",
    "stylus-loader": "^3.0.1",
    "ts-node": "~2.0.0",
    "tslint": "~4.5.0",
    "typescript": "~2.2.0",
    "url-loader": "^0.5.7",
    "webpack": "2.2.1",
    "webpack-dev-server": "~2.4.2"
  }

Thanks.

P0 docs

Source

patapron

👍2 😕1 🎉1

Most helpful comment

If you have a shared module, you can import and re-export FlexLayoutModule as part of your shared content.
Each feature module needs to import FlexLayoutModule (if those features use the flex-layout API) or import the shared module.

ThomasBurleson on 13 Jun 2017

👍5

All 15 comments

I have the same issue +1

isacm94 on 7 Jun 2017

😄1

can you show how are you importing the module?

jotatoledo on 8 Jun 2017

😕1

Sorry for de delay

import { BrowserModule } from '@angular/platform-browser';
import { NgModule, CUSTOM_ELEMENTS_SCHEMA, NO_ERRORS_SCHEMA } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';
import { NgModuleFactoryLoader } from '@angular/core';
import { NgbModule } from '@ng-bootstrap/ng-bootstrap';
import { AppComponent } from './app.component';
import { DashboardComponent } from './components/dashboard/dashboard.component';
import { Ng2Bs3ModalModule } from 'ng2-bs3-modal/ng2-bs3-modal';//Módulo para mostrar modales de bootstrap
import { AppRoutingModule } from './app-routing.module';
import { MdSidenavModule, MdToolbarModule, MdButtonModule, MdIconModule, MdInputModule } from '@angular/material';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { MdDatatableComponent } from './components/md-datatable/md-datatable.component';
import { BreadCrumbComponent } from './components/bread-crumb/bread-crumb.component';
import { TopBarModule } from './components/top-bar/top-bar.module';
import { LoginModule } from 'app/components/login/login.module';
import { FlexLayoutModule } from "@angular/flex-layout";

@NgModule({
  declarations: [
    AppComponent,
    DashboardComponent
  ],
  imports: [
    BrowserModule,
    TopBarModule,
    FormsModule,
    HttpModule,
    AppRoutingModule,
    Ng2Bs3ModalModule,
    NgbModule.forRoot(),
    MdSidenavModule,
    MdToolbarModule,
    MdButtonModule,
    MdToolbarModule,
    LoginModule,
    MdIconModule,
    BrowserAnimationsModule,
    MdInputModule,
    FlexLayoutModule
  ],
  bootstrap: [AppComponent],
  schemas: [CUSTOM_ELEMENTS_SCHEMA, NO_ERRORS_SCHEMA]
})
export class AppModule { }

If I import it into another module, the error is similar.

I've left it as impossible.

patapron on 9 Jun 2017

@patapron Hi, I faced the same problem with importing FlexLayoutModule. Below is workaround
Are you loading lazy module ?
If you are loading lazy module then you have to import FlexLayoutModule in your lazy module.

ggarg2 on 12 Jun 2017

😕1

If you have a shared module, you can import and re-export FlexLayoutModule as part of your shared content.
Each feature module needs to import FlexLayoutModule (if those features use the flex-layout API) or import the shared module.

ThomasBurleson on 13 Jun 2017

👍5

Reopened to add ^ info to the Wiki docs.

ThomasBurleson on 13 Jun 2017

👍1

Sorry, I tried, but I do not know how to import the module with lazy load in my webpack config, besides I do not understand why I have to do it there.

patapron on 14 Jun 2017

@patapron , just import FlexLayoutModule in the module you're lazy loading.

julianobrasil on 14 Jun 2017

@Juliano I can't load it lazy load with webpack, can you give me a hand? please.

patapron on 19 Jun 2017

@ggarg2 Please, can you help me with the webpack lazy load. I don't understand it very well. Thanks

patapron on 19 Jun 2017

Fortunately, I have a partner who knows webpack and has found a much simpler solution to use the library when loading modules with lazy load. Importing the library like this:

import { FlexLayoutModule } from "@angular/flex-layout/flexbox/_module";

Only this in your module and MAGIC.

Thank you all.

patapron on 19 Jun 2017

👍1

@patapron When I import it into my lazily loaded module I simply needed to import it like it says in the docs and shown below.

I don't see how any of your webpack configuration should matter specifically for this. The above import might work right now but break in a future version of this library if that module is moved inside the library for some reason.

import { FlexLayoutModule } from '@angular/flex-layout';
@NgModule({
  imports: [
    FlexLayoutModule,
// other imports
  ],
  exports: [],
  declarations: [],
  providers: [],
})
export class LazyModule { }