Unwrap for TypeScript
A simple unwrap function for use with TypeScript.
Installation
npm install --save ts-unwrapUsage
import unwrap from 'ts-unwrap'
// `port` is of type string, and will never be undefined
const port = unwrap(process.env['PORT'])
// optionally specify a custom error message
const port = unwrap(process.env['PORT'], 'Missing PORT from environment')API
unwrap<T>(value: T | undefined | null, errorMessage?: string): T
Throws an error if the value is undefined or null, otherwise it returns the value.
The description of the thrown error will be 'Missing value' unless another message is passed as the errorMessage argument.
Related Packages
Prior Art
- Rust
unwrapmethod