Error: _CoalescedStyleScheduler provider not found

I'm currently attempting to follow a tutorial on Angular Material pagination, but I keep encountering this error:

ERROR Error: Uncaught (in promise): NullInjectorError: StaticInjectorError(AppModule)[MatTable -> _CoalescedStyleScheduler]: 
  StaticInjectorError(Platform: core)[MatTable -> _CoalescedStyleScheduler]: 
 NullInjectorError: No provider for _CoalescedStyleScheduler! 

This error prevents the page from rendering properly. Here is the snippet of code causing the issue:

<mat-paginator [length] = "100" [pageSize] = "10" [pageSizeOptions] = "[5, 10, 25, 100]" (page) = "pageEvent = $event"></mat-paginator>

Even though I have imported all necessary modules as instructed in the tutorial.

UPDATE Here are the dependencies listed in my project:

"dependencies": {
    // List of dependencies...
  },

UPDATE 2 After importing the _CoalescedStyleScheduler, I encountered another error:

ERROR in ./src/app/app.module.ngfactory.js
Module not found: Error: Can't resolve '@angular/cdk/table/coalesced-style-scheduler' in 'C:\Users\Username\Documents\Project1\frontend\src\app'
// Additional errors related to resource locking or being busy.

UPDATE 3 Here is a snippet from my app.module.ts file:

// Imports and declarations...
@NgModule({
  // Module configuration...
})
export class AppModule {

  title = 'App';

 }

Answer №1

Update: I recently came across another possible reason for encountering this issue (while browsing through a variation of an application I am currently developing).

I have now identified two methods that can result in this problem:

Issue 1: discrepancies in versions between material and cdk

Within the package.json file, @angular/cdk and @angular/material possess conflicting version requirements, leading to cdk being >10.0.2 while material remains <=10.0.2.

To resolve this, ensure that both cdk and material are using the same version. These packages appear to be closely tested together.

Issue 2: inheritance from CdkTable (initial response)

It seems like you might be extending a CdkTable or MatTable somewhere, or utilizing a library that does so.

You must include a _CoalescedStyleScheduler in the providers for that extension, just as it is implemented in MatTable itself:

https://github.com/angular/components/blob/1b1c31e91e029418f0f2477242149b10c5cc7832/src/material/table/table.ts#L35

This action is necessary or consider upgrading your library with a CdkTable implementation to a version that supports it...

Answer №2

After upgrading Angular from version 10.0.0 to 10.0.8, I encountered this issue related to compatibility with libraries. By downgrading the CDK from "^10.1.2" to 10.0.2, the error was resolved.

Answer №3

An enhancement known as _CoalescedStyleScheduler was introduced by @angular/cdk in the CdkTable, which is now integrated into MatTable starting from version 10.0.2 onwards.

To ensure compatibility with the new version of MatTable, it is recommended to upgrade your @angular/material to a version released on or after July 27, 2020.

For smoother integration and functionality, it is advised to maintain the same version of @angular/material as @angular/cdk.

You can view the detailed changes in mat-table.ts through the following link: https://github.com/angular/components/commit/ef8fc4f98c984825401cb10456782a66c663e4ef#diff-0fa17bba051db8d8fefff13603d28575

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