If 'ng-template' is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the of this component to suppress this message. ("[ERROR ->]<ng-template>

Question

[email protected]?main=browser:355 Unhandled Promise rejection: Template parse errors: 'ng-template' is not a known element: 1. If 'ng-template' is an Angular component, then verify that it is part of this module. 2. If 'ng-template' is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the '@NgModule.schemas' of this component to suppress this message. ("[ERROR ->] ; Task: Promise.then ; Value: Error: Template parse errors: 'ng-template' is not a known element:

I have applied this FIX in my App.module.ts:

import { NgModule, CUSTOM_ELEMENTS_SCHEMA ,NO_ERRORS_SCHEMA}  from '@angular/core';


@NgModule({
    imports: [
        BrowserModule,
        FormsModule,
        ReactiveFormsModule,
        HttpModule,
        JsonpModule,
        CKEditorModule,
        Ng2DatetimePickerModule,
        Ng2DragDropModule,
        DragulaModule,
        ModalModule.forRoot(),
        MaterialModule.forRoot(),
        BootstrapModalModule,
        RouterModule.forRoot(appRoutes, {useHash: true})
    ],
    declarations: [something
    ],
    providers: [],
    bootstrap: [AppComponent],
    schemas: [ CUSTOM_ELEMENTS_SCHEMA, NO_ERRORS_SCHEMA ]
})

PACKAGES.JSON

"dependencies": {
    "@angular/common": "2.2.1",
    "@angular/compiler": "2.2.1",
    "@angular/core": "2.2.1",
    "@angular/forms": "2.2.1",
    "@angular/http": "2.2.1",
    "@angular/platform-browser": "2.2.1",
    "@angular/platform-browser-dynamic": "2.2.1",
    "@angular/router": "3.2.1",
    "bootstrap": "^3.3.7",
    "core-js": "^2.4.1",
    "jquery": "~3.1.1",
    "rxjs": "5.0.0-beta.12",
    "ts-helpers": "^1.1.1",
    "zone.js": "^0.6.23"
  },



"devDependencies": {
    "@angular/compiler-cli": "2.2.1",
    "@types/jasmine": "2.5.38",
    "@types/node": "^6.0.42",
    "angular-cli": "1.0.0-beta.21",
    "codelyzer": "~1.0.0-beta.3",
    "jasmine-core": "2.5.2",
    "jasmine-spec-reporter": "2.5.0",
    "karma": "1.2.0",
    "karma-chrome-launcher": "^2.0.0",
    "karma-cli": "^1.0.1",
    "karma-jasmine": "^1.0.2",
    "karma-remap-istanbul": "^0.2.1",
    "protractor": "4.0.9",
    "ts-node": "1.2.1",
    "tslint": "3.13.0",
    "typescript": "~2.0.3",
    "webdriver-manager": "10.2.5"
  }

Even after this it is not working.

Solution 1

1. Update angular-cli: https://github.com/angular/angular-cli/wiki/stories-1.0-update
2. Update typescript and optionally your @angular packages. Your packages are pretty behind, most importantly angular-cli, so be prepared.
   • My core packages:

dependecies: {
  "@angular/animations": "^4.0.2",
  "@angular/common": "^2.3.1",
  "@angular/compiler": "^2.3.1",
  "@angular/compiler-cli": "^2.4.10",
  "@angular/core": "^2.3.1",
  "@angular/forms": "^2.3.1",
  "@angular/http": "^2.3.1",
  "@angular/material": "^2.0.0-beta.3",
  "@angular/platform-browser": "^2.3.1",
  "@angular/platform-browser-dynamic": "^2.3.1",
  "@angular/platform-server": "^4.0.0",
  "@angular/router": "^3.3.1"
}
devDependencies: {
  "@angular/cli": "^1.0.0",
  "typescript": "^2.2.2"
}

3. npm install @angular/material && npm install hammerjs —-save
   • add /node_modules/hammerjs/hammer.js in angular-cli.json
4. MaterialModuleis deprecated https://github.com/angular/material2/releases
   • import individual modules into your app.module, and export accordingly then simply add tags to html

Solution 2

<ng-template> was introduced in Angular4.

User either <template> or <ng-container>

See also

• https://github.com/angular/angular/blob/master/CHANGELOG.md#installing-rc1
• https://github.com/angular/angular/issues/15860