assertFalse | /assert/mod.ts | std@0.222.0

Module

std/assert/mod.ts>assertFalse

The Deno Standard Library

denoland/deno_std

Go to Latest

mod.ts (default module)

assertNotStrictEquals

assert_almost_equals.ts

assertAlmostEquals

assert_array_includes.ts

assert_greater_or_equal.ts

assertGreaterOrEqual

assert_greater.ts

assertGreater

assert_instance_of.ts

assert_less_or_equal.ts

assert_not_instance_of.ts

assertNotInstanceOf

assert_not_match.ts

assertNotMatch

assert_not_strict_equals.ts

assertNotStrictEquals

assert_object_match.ts

assertObjectMatch

assert_rejects.ts

assertRejects

assert_strict_equals.ts

assertStrictEquals

assert_string_includes.ts

The Standard Library has been moved to JSR. See the blog post for details.

function assertFalse

Re-export

import { assertFalse } from "https://deno.land/std@0.222.0/assert/mod.ts";

assertFalse(expr: unknown, msg?): asserts expr is Falsy

Make an assertion, error will be thrown if expr have truthy value.

Examples

Example 1

import { assertFalse } from "https://deno.land/std@0.222.0/assert/assert_false.ts";

assertFalse(false); // Doesn't throw
assertFalse(true); // Throws

Parameters

expr: unknown

optional

msg = [UNSUPPORTED]

Returns

asserts expr is Falsy