Throw a compile-time error on references to undeclared variables
Runs typescript type checker and linter on separate process.
Transform optional chaining operators into a series of nil checks
Minimalistic update notifications for command line interfaces
check whether a command line command exists in the current environment
Check whether a string is a URL.
Check if stdout or stderr is interactive
Minimal module to check if a file is executable.
Check if the character represented by a given Unicode code point is fullwidth
Simple update notifier to check for npm updates for cli applications
Check if an object has a local property.
A module used internally by Jest to check which files have changed since you last committed in git or hg.
Check Travis CI environment before publishing
Error comparison and information related utility for node and the browser
Check if async/await is available
Calculates and/or checks data coming through a stream and emits the digest before stream end.
Check if your code has been bundled with webpack
Vite plugin that runs TypeScript type checker on a separate process.