Review your code thoroughly

Oct 13, 2025 by wbrum.org 145 views

Introduction

TypeScript 5.8 has introduced a new feature called erasableSyntaxOnly, which aims to improve the output of generated schemas. One of the key changes is that the output should not use enums. In this article, we will explore how to update your code to work with this new feature.

Understanding `erasableSyntaxOnly`

erasableSyntaxOnly is a new option in TypeScript 5.8 that allows you to control the output of generated schemas. When set to true, it ensures that the output does not use enums. This change is designed to improve the compatibility and usability of the generated schemas.

Why is `erasableSyntaxOnly` Important?

The introduction of erasableSyntaxOnly is significant because it addresses a common issue in TypeScript. Enums can sometimes cause problems when working with generated schemas, particularly when dealing with complex data types. By removing enums from the output, erasableSyntaxOnly helps to simplify the schema and make it more manageable.

Updating Your Code

To update your code to work with erasableSyntaxOnly, you need to make a few changes. Here are the key steps:

Step 1: Check Your TypeScript Version

Before you start updating your code, ensure that you are using TypeScript 5.8 or later. You can check your version by running the following command in your terminal:

tsc --version

Step 2: Enable `erasableSyntaxOnly`

To enable erasableSyntaxOnly, you need to add the following option to your tsconfig.json file:

{
  "compilerOptions": {
    // ... other options ...
    "erasableSyntaxOnly": true
  }
}

Step 3: Review Your Code

Once you have enabled erasableSyntaxOnly, review your code to ensure that it is working as expected. You may need to make some changes to your code to accommodate the new output.

Example Use Case

Let's consider an example to illustrate how to update your code to work with erasableSyntaxOnly. Suppose you have a schema that uses enums:

enum Color {
  Red,
  Green,
  Blue
}

interface Person {
  name: string;
  color: Color;
}

To update this code to work with erasableSyntaxOnly, you can replace the enum with a string:

interface Person {
  name: string;
  color: 'Red' | 'Green' | 'Blue';
}

Best Practices

When updating your code to work with erasableSyntaxOnly, keep the following best practices in mind:

Review your code thoroughly: Ensure that your code is working as expected after updating it to work with erasableSyntaxOnly.
Use string literals: When replacing enums with strings, use string literals to maintain consistency.
Avoid using enums: If possible, avoid using enums in your code to ensure that it works seamlessly with erasableSyntaxOnly.

Conclusion

Q: What is `erasableSyntaxOnly` in TypeScript 5.8?

A: erasableSyntaxOnly is a new feature in TypeScript 5.8 that allows you to control the output of generated schemas. When set to true, it ensures that the output does not use enums.

Q: Why is `erasableSyntaxOnly` important?

A: The introduction of erasableSyntaxOnly is significant because it addresses a common issue in TypeScript. Enums can sometimes cause problems when working with generated schemas, particularly when dealing with complex data types. By removing enums from the output, erasableSyntaxOnly helps to simplify the schema and make it more manageable.

Q: How do I enable `erasableSyntaxOnly` in my project?

A: To enable erasableSyntaxOnly, you need to add the following option to your tsconfig.json file:

{
  "compilerOptions": {
    // ... other options ...
    "erasableSyntaxOnly": true
  }
}

Q: What are the benefits of using `erasableSyntaxOnly`?

A: The benefits of using erasableSyntaxOnly include:

Improved compatibility with generated schemas
Simplified schema output
Reduced complexity when working with complex data types

Q: Can I use enums with `erasableSyntaxOnly`?

A: No, you should avoid using enums with erasableSyntaxOnly. Instead, use string literals to maintain consistency.

Q: How do I update my code to work with `erasableSyntaxOnly`?

A: To update your code to work with erasableSyntaxOnly, follow these steps:

Check your TypeScript version to ensure you are using TypeScript 5.8 or later.
Enable erasableSyntaxOnly in your tsconfig.json file.
Review your code to ensure it is working as expected.
Replace enums with string literals to maintain consistency.

Q: What are some best practices for using `erasableSyntaxOnly`?

A: Some best practices for using erasableSyntaxOnly include:

Reviewing your code thoroughly to ensure it is working as expected.
Using string literals to maintain consistency.
Avoiding the use of enums in your code.

Q: Can I disable `erasableSyntaxOnly` if I need to use enums?

A: Yes, you can disable erasableSyntaxOnly by setting the option to false in your tsconfig.json file:

{
  "compilerOptions": {
    // ... other options ...
    "erasableSyntaxOnly": false
  }
}

Q: Where can I find more information about `erasableSyntaxOnly`?

A: You can find more information about erasableSyntaxOnly in the official TypeScript documentation.

Conclusion

erasableSyntaxOnly is a new feature in TypeScript 5.8 that allows you to control the output of generated schemas. By following the steps outlined in this article and keeping the best practices in mind, you can ensure that your code is compatible with the new feature. If you have any further questions, feel free to ask!