Missing structural directive

This diagnostic ensures that a standalone component using custom structural directives (e.g., *select or *featureFlag) in a template has the necessary imports for those directives.

import {Component} from '@angular/core';

@Component({
  // Template uses `*select`, but no corresponding directive imported.
  imports: [],
  template: `<p *select="let data; from: source">{{ data }}</p>`,
})
class MyComponent {}

What's wrong with that?

Using a structural directive without importing it will fail at runtime, as Angular attempts to bind to a select property of the HTML element, which does not exist.

What should I do instead?

Make sure that the corresponding structural directive is imported into the component:

import {Component} from '@angular/core';
import {SelectDirective} from 'my-directives';

@Component({
  // Add `SelectDirective` to the `imports` array to make it available in the template.
  imports: [SelectDirective],
  template: `<p *select="let data; from: source">{{ data }}</p>`,
})
class MyComponent {}

Configuration requirements

strictTemplates must be enabled for any extended diagnostic to emit. missingStructuralDirective has no additional requirements beyond strictTemplates.

What if I can't avoid this?

This diagnostic can be disabled by editing the project's tsconfig.json file:

{
  "angularCompilerOptions": {
    "extendedDiagnostics": {
      "checks": {
        "missingStructuralDirective": "suppress"
      }
    }
  }
}

See extended diagnostic configuration for more info.