Ensure Packages

Convert a value to an array

Ensure directories exist before writing to them.

Async module-loading library and protocol for bundlers/loaders targeting isomorphic apps and Node.js.

Ensures a value is a valid error by making it one if not

Additional mongoose schema validations

Retry a function until or while it passes an assertion

Strictly enforce node version

When you have an error-ish but what you really want is an Error

Ensures value is defined (i.e., neither undefined nor null).

Manipulate strings with prefixes and suffixes.

Prepare for writing a file to the given path – create ancestor directories and verify no directory exists in the path

Ensure runtime type safety and perform type coercion if needed.

Assertions to do some runtime type checking

Ensures that the file path exists.

mongoose validation to ensure referenced object id exists

Force a numerical value to be within bounds, or a safe default.

A mongoose plugin, improving 'Model.ensureIndexes' method, allowing also deletion of unused indexes and reindexing with changed options.

Use webpack loaders seamlessly – in node as well as in the browser.

Make sure a directory exists and create the non-exist ones.

Simple, reusable and composable validation