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@xylabs/assert
Advanced tools
Base functionality used throughout XY Labs TypeScript/JavaScript libraries
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
FAQs
Base functionality used throughout XY Labs TypeScript/JavaScript libraries
The npm package @xylabs/assert receives a total of 4,982 weekly downloads. As such, @xylabs/assert popularity was classified as popular.
We found that @xylabs/assert demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 5 open source maintainers collaborating on the project.
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