feature request: type guards for multi params

[islishude]

Search Terms

Suggestion

Use Cases

Examples

import { isString, isNubmer } from "util";

function Case(name?: string, symbol?: string, decimals?: number): name is string => {
  return isString(name) && isString(symbol) && isNumber(decimals);
};

not only name is string but symbol is string && decimals is nubmer

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. new expression-level syntax)

[jack-williams]

I think this is a duplicate of #26916