assert | /deps.ts | silicon@v1.0.0

Deno module to generate images from source code using Aloxaf/silicon.

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function assert

import { assert } from "https://deno.land/x/silicon@v1.0.0/deps.ts";

assert<T>(

x: unknown,

options?: { message?: string; name?: string; },

): asserts x is T

Asserts that the given value satisfies the provided predicate.

import { assert } from "./util.ts";
import is from "./is.ts";

const a: unknown = "hello";
assert(a, is.String);
// a is now narrowed to string

Type Parameters

x: unknown

The value to be asserted.

The predicate function to test the value against.

optional

options: { message?: string; name?: string; } = [UNSUPPORTED]

Optional configuration for the assertion.

asserts x is T

Nothing. The function has a return type of asserts x is T to help TypeScript narrow down the type of x after the assertion.