invariant 's direct dependencies. Data on all dependencies, including transitive ones, is available via CSV download.| Name | Version | Size | License | Type | Vulnerabilities |
|---|---|---|---|---|---|
| loose-envify | 1.4.0 | 2.78 kB | MIT | prod |
Invariant is a utility function that you can use in your JavaScript projects to enforce conditions in your code. Its primary function is to throw errors when certain conditions are not met. The package is known for providing more descriptive errors in development environments while resorting to generic errors in production for performance optimization.
When it comes to using the Invariant package in JavaScript, you need to start by installing it using npm: npm install invariant. Once installed, you can require Invariant in your file and use it to perform checks in your code. Here is an example:
var invariant = require('invariant');
invariant(someTruthyValue, 'This will not throw');
// If "someTruthyValue" is truthy, no error will be thrown
invariant(someFalsyValue, 'This will throw an error with this message');
// If "someFalsyValue" is falsy, an error will be thrown with the message: 'This will throw an error with this message'
Note that the error message is required if not in production (process.env.NODE_ENV !== 'production). In a production context, the message is optional and can be removed after minifying.
For detailed information about the Invariant npm package, users are recommended to explore the official GitHub page: invariant on GitHub. The page hosts the complete README file, which provides a clear understanding of the utility package and guides you with code examples on how it can be applied in real project environments. The README also contains links to related libraries for additional insight.
