@vaguevoid/fiasco / error / assert

Function: assert()

assert(condition, message?): asserts condition

Defined in: src/error.ts:76

assert throws an error if the condition is false. unlike console.assert, this will prevent execution and allow usage of optional typescript types without guards after an assert.

Parameters

condition

any

message?

string

Returns

asserts condition

Example

function foo(bar?: string) {
 assert(bar, "bar is required")
 console.log(bar.toUpperCase()) // bar is now a string
}