What are some examples of custom assessments I can create for Yoast SEO

1. Create a Custom Assessment Class:
- Extend the `Assessment` class provided by Yoast SEO.
- Implement the `getResult()` method, which takes a `Paper` object, a `Researcher` object, and an `i18n` object as parameters.
- This method should analyze the content and return an `AssessmentResult` object with a score and feedback text.

2. Register the Custom Assessment:
- Create a custom web worker that can hook into Yoast SEO.
- Use the `_worker.registerAssessment()` method to add the custom assessment to Yoast SEO's analysis.

3. Handle Errors:
- Wrap your code in a try-catch block to handle any unexpected errors that may occur during the assessment.
- Log the error to help with debugging.
- Provide a fallback assessment result with a low score and an error message to inform the user about the issue.

Here is a sample code snippet for a custom assessment:

javascript
import { AssessmentResult, Assessment } from 'yoastseo';

export default class CustomAssessment extends Assessment {
  constructor(settings) {
    super();
    this.settings = settings;
  }

  getResult(paper, researcher, i18n) {
    // Check for the occurrence of the word Yoast in the title.
    const title = paper.getTitle();
    const matches = (title.match(/Yoast/gi) || []).length;

    const assessmentResult = new AssessmentResult();
    const { score, text } = this.score(matches);
    assessmentResult.setScore(score);
    assessmentResult.setText(text);
    return assessmentResult;
  }
}

And here is how you can register the custom assessment:

javascript
const customWorker = new CustomWorker();
customWorker.register();

const customAssessment = new CustomAssessment(settings);
this._worker.registerAssessment("customAssessment", customAssessment, "MyCustomAssessmentPlugin");

By following these steps and handling any potential errors, you can create custom assessments that analyze specific aspects of a post, page, or term and provide actionable feedback to improve the content.