Multiple assertions on a single function

[sagi-arbroknot]

Suggestion

🔍 Search Terms

assert, assertion, type guard

✅ Viability Checklist

My suggestion meets these guidelines:

• This wouldn't be a breaking change in existing TypeScript/JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be implemented without emitting different JS based on the types of the expressions
• This isn't a runtime feature (e.g., library functionality, non-ECMAScript syntax with JavaScript output, new syntax sugar for JS, etc.)
• This feature would agree with the rest of TypeScript's Design Goals.

⭐ Suggestions

Working with multiple assertion guards.

📃 Motivating Example

private assertWebhook(
      hostname: string,
      ip: string,
      query: Record<string, any> | undefined,
      body: Record<string, any> | Record<string, any>[] | undefined,
): asserts query, assert body

💻 Use Cases

Having a single function/method that allows multiple assertions.
The current approach doesn't allow multiple assertion guards.
I must create a function for each assertion individually
and return the asserted value with their perspective types.

[MartinJohns]

Duplicate of #42253.

[typescript-bot]

This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.