Function isErr

Check if a result is failed.

Example

import { isErr } from "typerun/result";
import { string } from "typerun/schema";
import { validate } from "typerun";

const result = validate(string)(42);

if (isErr(result)) {
  console.log(result.errors); // [{ name: "ValidationError", message: "Value `42` is not a string" }]
} else {
  console.log(result.data);
}
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