XY Labs generalized Javascript library
Common Javascript code that is used throughout XYO projects that use React.
Using npm:
npm i --save @xylabs/assert
Using yarn:
yarn add @xylabs/assert
The assertEx
function is a utility function for simple null/undefined checks for variables. It evaluates an expression for truthiness and throws an error if the expression is false.
Here are some examples of how to use assertEx
in different scenarios:
-
Basic usage:
import { assertEx } from '@xylabs/assert'; const value = getValue(); // This is a function that may return null or undefined assertEx(value); // Throws an AssertExError with a default message if value is null or undefined
-
Using with a custom error message:
import { assertEx } from '@xylabs/assert'; const value = getValue(); // This function may return null or undefined assertEx(value, () => 'Dynamic error message based on some conditions'); // Throws an AssertExError with a dynamic message if value is null or undefined
See the LICENSE file for license details