ts-invariant

TypeScript implementation of invariant(condition, message)

Usage no npm install needed!

<script type="module">
  import tsInvariant from 'https://cdn.skypack.dev/ts-invariant';
</script>

README

ts-invariant

TypeScript implementation of invariant(condition, message).

Supports invariant.log, invariant.warn, and invariant.error, which wrap console methods of the same name, and may be stripped in production by rollup-plugin-invariant.

The verbosity of these methods can be globally reconfigured using the setVerbosity function:

import { setVerbosity } from "ts-invariant";

setVerbosity("log"); // display all messages (default)
setVerbosity("warn"); // display only warnings and errors
setVerbosity("error"); // display only errors
setVerbosity("silent"); // display no messages