Check if a string or date object is a valid birthdate.

Convert a string to a valid JavaScript identifier

Detect if a string is a data URL

Return true if a value is a valid glob pattern or patterns.

A function to check whether a prop is valid for HTML and SVG elements

A sanitize module for the people. Built for ApostropheCMS.

Returns true if a value has the characteristics of a valid JavaScript data descriptor.

Give me a string and I'll tell you if it's a valid npm package name

Returns true if a file path does not contain any invalid characters.

Check if a string is a valid JavaScript identifier

Checks if the geometry is a valid according to the OGC Simple Feature Specification.

The semantic version parser used by npm.

Wrapper around is-valid-instance and is-registered for validating `base` plugins. Returns true if `app` is a valid instance of base and a plugin is not registered yet.

JSON for Humans

Convert a string to a valid safe filename

Validate domain name

Copy a descriptor from object A to object B

Returns true if a value is a valid instance of Base.

Check if a string is a valid filename

Brand checking of React Elements.