'mat-form-field' is not a known element - Angular 5 & Material2
Solution 1
You're only exporting it in your NgModule, you need to import it too
@NgModule({
imports: [
MatButtonModule,
MatFormFieldModule,
MatInputModule,
MatRippleModule,
]
exports: [
MatButtonModule,
MatFormFieldModule,
MatInputModule,
MatRippleModule,
],
declarations: [
SearchComponent,
],
})export class MaterialModule {};
better yet
const modules = [
MatButtonModule,
MatFormFieldModule,
MatInputModule,
MatRippleModule
];
@NgModule({
imports: [...modules],
exports: [...modules]
,
})export class MaterialModule {};
update
You're declaring component (SearchComponent) depending on Angular Material before all Angular dependency are imported
Like BrowserAnimationsModule
Try moving it to MaterialModule, or before it
Solution 2
You're trying to use the MatFormFieldComponent
in SearchComponent
but you're not importing the MatFormFieldModule
(which exports MatFormFieldComponent
); you only export it.
Your MaterialModule
needs to import it.
@NgModule({
imports: [
MatFormFieldModule,
],
exports: [
MatButtonModule,
MatFormFieldModule,
MatInputModule,
MatRippleModule,
],
declarations: [
SearchComponent,
],
})
export class MaterialModule { }
Solution 3
When using the 'mat-form-field' MatInputModule needs to be imported also
import {
MatToolbarModule,
MatButtonModule,
MatSidenavModule,
MatIconModule,
MatListModule ,
MatStepperModule,
MatInputModule
} from '@angular/material';
Solution 4
I had this problem too. It turned out I forgot to include one of the components in app.module.ts
Solution 5
the problem is in the MatInputModule:
exports: [
MatInputModule
]
Admin
Updated on July 08, 2022Comments
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Admin almost 2 years
I'm trying to use
<mat-form-field>
in an Angular project using Material2 but I've hit a wall.Getting the error message below.
Uncaught Error: Template parse errors: 'mat-form-field' is not a known element: 1. If 'mat-form-field' is an Angular component, then verify that it is part of this module. 2. If 'mat-form-field' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("[ERROR ->]<mat-form-field> <input matInput placeholder="Simple placeholder" required> </mat-form-field>"): ng:///MaterialModule/SearchComponent.html@0:0 at syntaxError (compiler.js:485) at TemplateParser.parse (compiler.js:24660) at JitCompiler._parseTemplate (compiler.js:34471) at JitCompiler._compileTemplate (compiler.js:34446) at eval (compiler.js:34347) at Set.forEach (<anonymous>) at JitCompiler._compileComponents (compiler.js:34347) at eval (compiler.js:34217) at Object.then (compiler.js:474) at JitCompiler._compileModuleAndComponents (compiler.js:34216)
This is my code I've got.
app.module.ts
import { BrowserModule } from '@angular/platform-browser'; import { NgModule, CUSTOM_ELEMENTS_SCHEMA } from '@angular/core'; import { FormGroup, FormControl, FormsModule, ReactiveFormsModule } from '@angular/forms'; import { HttpModule } from '@angular/http'; import { HttpClientModule } from '@angular/common/http'; import { MatButtonModule, MatFormFieldModule, MatInputModule, MatRippleModule } from '@angular/material'; import { BrowserAnimationsModule } from '@angular/platform-browser/animations'; import { AppComponent } from './app.component'; import { YahooService } from './yahoo.service'; import { SearchComponent } from './search/search.component'; @NgModule({ exports: [ MatButtonModule, MatFormFieldModule, MatInputModule, MatRippleModule, ], declarations: [ SearchComponent, ], }) export class MaterialModule {}; @NgModule({ declarations: [ AppComponent ], imports: [ MaterialModule, BrowserModule, BrowserAnimationsModule, FormsModule, HttpModule, HttpClientModule, ], providers: [ YahooService, ], bootstrap: [ AppComponent, ], schemas: [ CUSTOM_ELEMENTS_SCHEMA, ], }) export class AppModule { }
search.component.html
<mat-form-field> <input matInput placeholder="Simple placeholder" required> </mat-form-field>
search.component.ts
import { Component, OnInit } from '@angular/core'; import { FormBuilder, FormGroup } from '@angular/forms'; @Component({ selector: 'app-search', templateUrl: './search.component.html', styleUrls: ['./search.component.css'] }) export class SearchComponent implements OnInit { options: FormGroup; constructor(fb: FormBuilder) { this.options = fb.group({ floatLabel: 'never', }); } ngOnInit() { } }
package.json
{ "name": "forecast", "version": "0.0.0", "license": "MIT", "scripts": { "ng": "ng", "start": "ng serve", "build": "ng build", "test": "ng test", "lint": "ng lint", "e2e": "ng e2e" }, "private": true, "dependencies": { "@angular-devkit/schematics": "0.0.40", "@angular/animations": "^5.1.3", "@angular/cdk": "^5.0.3", "@angular/common": "^5.1.3", "@angular/compiler": "^5.1.3", "@angular/core": "^5.1.3", "@angular/forms": "^5.1.3", "@angular/http": "^5.1.3", "@angular/material": "^5.0.3", "@angular/platform-browser": "^5.1.3", "@angular/platform-browser-dynamic": "^5.1.3", "@angular/router": "^5.1.3", "axios": "^0.17.1", "body-parser": "^1.18.2", "core-js": "^2.5.3", "express": "^4.16.2", "node-sass": "^4.7.2", "nodemon": "^1.14.7", "q": "^1.5.1", "rxjs": "^5.5.6", "zone.js": "^0.8.4" }, "devDependencies": { "@angular/cli": "^1.6.3", "@angular/compiler-cli": "^5.1.3", "@types/jasmine": "2.5.38", "@types/node": "~6.0.60", "codelyzer": "~2.0.0", "jasmine-core": "~2.5.2", "jasmine-spec-reporter": "~3.2.0", "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", "protractor": "~5.1.0", "ts-node": "~2.0.0", "tslint": "~4.5.0", "typescript": "~2.4.0" } }
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Armen Vardanyan over 6 yearsBut, as far as I know, listing a module in
exports
does automatically import it into the module, as to avoid repeating code -
Kirk Larkin over 6 years@ArmenVardanyan Exporting from e.g. Module A makes it available to other modules that import Module A but not to Module A itself - It needs to import it too.
-
Steve over 5 years@iancovici If I try to set up the
const modules
array, I get an error "cannot find (module name)" How do you use this? -
konyak over 4 yearsFYI for those curious, three dots (…) in the code is either rest parameters or the spread operator. In this case, it's a "spread operator" and expands an array into a list.
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Johnny Andrew over 3 years^ This. In my case, a dialog component was throwing the error (I manually created the dialog component). Imported and added the dialog component in the declarations array from app.module.ts (in my case) and problem was solved
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Jorge Rivera about 3 yearsSomething similar happened to me, but in my case I split a module into two modules, and forgot to remove some code that was launching a modal with a component that was not part of the module, just deleted that code and it works now. This helped me to realize that error, thanks.
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Oushima about 2 yearsWhy is the second example with
[...modules]
better?