Can't bind to 'mode' since it isn't a known property of 'mat-sidenav'

Question

Hi I don't know what to do with this

Here's the error

compiler.js:2430 Uncaught Error: Template parse errors:
Can't bind to 'mode' since it isn't a known property of 'mat-sidenav'.
1. If 'mat-sidenav' is an Angular component and it has 'mode' input, then verify that it is part of this module.
2. If 'mat-sidenav' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.
3. To allow any property add 'NO_ERRORS_SCHEMA' to the '@NgModule.schemas' of this component. ("="sidenav" fixedInViewport
      [attr.role]="(isHandset$ | async) ? 'dialog' : 'navigation'"
      [ERROR ->][mode]="(isHandset$ | async) ? 'over' : 'side'"
      [opened]="(isHandset$ | async) === false">
    "): ng:///ComponentsModule/SidenavComponent.html@3:6
Can't bind to 'opened' since it isn't a known property of 'mat-sidenav'.
1. If 'mat-sidenav' is an Angular component and it has 'opened' input, then verify that it is part of this module.
2. If 'mat-sidenav' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.
3. To allow any property add 'NO_ERRORS_SCHEMA' to the '@NgModule.schemas' of this component. ("et$ | async) ? 'dialog' : 'navigation'"
      [mode]="(isHandset$ | async) ? 'over' : 'side'"
      [ERROR ->][opened]="(isHandset$ | async) === false">
    <mat-toolbar>Menu</mat-toolbar>
    <mat-nav-list>
"): ng:///ComponentsModule/SidenavComponent.html@4:6
'mat-toolbar' is not a known element:
1. If 'mat-toolbar' is an Angular component, then verify that it is part of this module.
2. If 'mat-toolbar' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("mode]="(isHandset$ | async) ? 'over' : 'side'"
      [opened]="(isHandset$ | async) === false">
    [ERROR ->]<mat-toolbar>Menu</mat-toolbar>
    <mat-nav-list>
      <a mat-list-item href="#">Link 1</a>
"): ng:///ComponentsModule/SidenavComponent.html@5:4
'mat-nav-list' is not a known element:
1. If 'mat-nav-list' is an Angular component, then verify that it is part of this module.
2. If 'mat-nav-list' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("
      [opened]="(isHandset$ | async) === false">
    <mat-toolbar>Menu</mat-toolbar>
    [ERROR ->]<mat-nav-list>
      <a mat-list-item href="#">Link 1</a>
      <a mat-list-item href="#">Link 2</a>
"): ng:///ComponentsModule/SidenavComponent.html@6:4
'mat-sidenav' is not a known element:
1. If 'mat-sidenav' is an Angular component, then verify that it is part of this module.
2. If 'mat-sidenav' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("<mat-sidenav-container class="sidenav-container">
  [ERROR ->]<mat-sidenav #drawer class="sidenav" fixedInViewport
      [attr.role]="(isHandset$ | async) ? 'dialo"): ng:///ComponentsModule/SidenavComponent.html@1:2
'mat-icon' is not a known element:
1. If 'mat-icon' is an Angular component, then verify that it is part of this module.
2. If 'mat-icon' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("
        (click)="drawer.toggle()"
        *ngIf="isHandset$ | async">
        [ERROR ->]<mat-icon aria-label="Side nav toggle icon">menu</mat-icon>
      </button>
      <span>tester</span>"): ng:///ComponentsModule/SidenavComponent.html@20:8
'mat-toolbar' is not a known element:
1. If 'mat-toolbar' is an Angular component, then verify that it is part of this module.
2. If 'mat-toolbar' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("
  </mat-sidenav>
  <mat-sidenav-content>
    [ERROR ->]<mat-toolbar color="primary">
      <button
        type="button"
"): ng:///ComponentsModule/SidenavComponent.html@13:4
'mat-sidenav-content' is not a known element:
1. If 'mat-sidenav-content' is an Angular component, then verify that it is part of this module.
2. If 'mat-sidenav-content' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("
    </mat-nav-list>
  </mat-sidenav>
  [ERROR ->]<mat-sidenav-content>
    <mat-toolbar color="primary">
      <button
"): ng:///ComponentsModule/SidenavComponent.html@12:2
'mat-sidenav-container' is not a known element:
1. If 'mat-sidenav-container' is an Angular component, then verify that it is part of this module.
2. If 'mat-sidenav-container' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("[ERROR ->]<mat-sidenav-container class="sidenav-container">
  <mat-sidenav #drawer class="sidenav" fixedInViewp"): ng:///ComponentsModule/SidenavComponent.html@0:0
    at syntaxError (compiler.js:2430)
    at TemplateParser.push../node_modules/@angular/compiler/fesm5/compiler.js.TemplateParser.parse (compiler.js:20605)
    at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._parseTemplate (compiler.js:26171)
    at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._compileTemplate (compiler.js:26158)
    at compiler.js:26101
    at Set.forEach (<anonymous>)
    at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._compileComponents (compiler.js:26101)
    at compiler.js:26011
    at Object.then (compiler.js:2421)
    at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._compileModuleAndComponents (compiler.js:26010)

My structure is like this

1. Sidenav is generated by @angular/material:material-nav --name=sidenav

2. imports are moved from app.module.ts to app.material.module.ts where MatToolbarModule, MatButtonModule, MatSidenavModule, MatIconModule, MatListModule are included.

3. AdminLayoutComponent and AuthLayoutComponent are the only components here

4. material module is

import { NgModule } from '@angular/core';
import { MatToolbarModule, MatButtonModule, MatSidenavModule, MatIconModule, MatListModule } from '@angular/material';


@NgModule({
  imports: [
    MatToolbarModule,
    MatButtonModule,
    MatSidenavModule,
    MatIconModule,
    MatListModule
  ],
  exports: [
    MatToolbarModule,
    MatButtonModule,
    MatSidenavModule,
    MatIconModule,
    MatListModule
  ]
})
export class MaterialModule { }

Answer 1

I have just had a similar problem. I had all the modules set up properly but the HTML just couldn't find the materials sidenav.

In the end it turned out that I had accidently removed AppComponent from the declarations part of app.module.ts:

@NgModule({
    imports: [
        MatSidenavModule,
      ],
    declarations: [
        AppComponent
    ],
    providers: [],
    bootstrap: [AppComponent]
})
export class AppModule { }

I wasn't 'using it'; I was only using the HTML part of the component ... so I must have deleted the declaration to be tidy. Turns out that the module uses this declaration to know who gets it's imported information and that the HTML is as much a part of the component as the javascript and css parts.

Hopefully this will help someone else; I suspect the original poster is long gone.