Angular Material is a popular library for creating modern and responsive user interfaces. One of the widely used components in Angular Material is the MatFormField component, which wraps input fields and provides features like labels, hints, and validation messages. However, you might encounter the “mat-form-field must contain a MatFormFieldControl” error while working with MatFormField. In this article, we will explore the reasons behind this error and discuss the steps to fix it.

Understanding the Error

The “mat-form-field must contain a MatFormFieldControl” error occurs when the MatFormField component is not associated with any control that implements the MatFormFieldControl interface. Angular Material components like MatInput and MatSelect already implement this interface. The error indicates that the required control is either missing or improperly configured within the MatFormField component.

Fixing the Error

Here are some steps to fix the “mat-form-field must contain a MatFormFieldControl” error:

Step 1: Ensure that the required Angular Material components are imported

First, check if the necessary Angular Material components are imported in your module. For example, if you are using a MatInput component, ensure that the MatInputModule is imported in your AppModule or a shared module:

import { MatInputModule } from '@angular/material/input';

  imports: [
    // Other imports
  // Other configurations
export class AppModule {}

Step 2: Check the component configuration

Next, verify the configuration of the component within the MatFormField. Angular Material components like MatInput and MatSelect should be correctly placed inside the MatFormField component:

  <mat-label>Example Input</mat-label>
  <input matInput placeholder="Placeholder">

In this example, the input element has the matInput directive applied, ensuring that it is correctly associated with the MatFormField component.

Step 3: Verify custom controls

If you are using a custom control inside the MatFormField component, ensure that it implements the MatFormFieldControl interface. You need to import the MatFormFieldControl from the @angular/material/form-field package and make your custom control implement this interface:

import { MatFormFieldControl } from '@angular/material/form-field';

  // Component configurations
  providers: [
      provide: MatFormFieldControl,
      useExisting: YourCustomControlComponent
export class YourCustomControlComponent implements MatFormFieldControl<YourControlValueType> {
  // Your custom control implementation

Make sure to implement the required methods and properties for the MatFormFieldControl interface in your custom control component.


The “mat-form-field must contain a MatFormFieldControl” error in Angular is a common issue that developers may encounter while working with Angular Material components. By following the steps outlined in this article, you can quickly fix this error and ensure that your form fields are properly configured and associated with their respective controls.

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