Function existsFunc

Export assertion functions

existsFunc<R>(this: IAssertScope, evalMsg?: MsgSource): R

Asserts that the target is not null and not undefined.

Type Parameters

R

Parameters

this: IAssertScope
The assert scope.
OptionalevalMsg: MsgSource
The message to display if the assertion fails.

Returns R

The assert scope.

Since

0.1.5

Example

import { assert } from "@nevware21/tripwire";

assert(0).to.exist();          // Passes - 0 is not null or undefined
assert("").to.exist();         // Passes - empty string exists
assert(false).to.exist();      // Passes - false exists
assert(null).to.not.exist();   // Passes - null does not exist
assert(undefined).to.not.exist(); // Passes - undefined does not exist