import { isErr } from "https://deno.land/x/result_js@2.0.0/mod.ts";
Returns true if the result is a Err.
Examples
Example 1
Example 1
import { isErr } from "https://deno.land/x/result_js/operators/query.ts";
import { Err, type Result } from "https://deno.land/x/result_js/spec.ts";
import { assert } from "https://deno.land/std/testing/asserts.ts";
const result: Result<unknown, unknown> = Err(0);
assert(isErr(result));