# `@jsii/check-node` This package can be used to check whether the node runtime used to run an application is known to be compatible with the `jsii` constellation of packages, and emits a warning to `STDERR` in case this is not the case. ## Usage Either import the `checkNode` function from the root of the package, and run it wherever it makes sense (often at the entry point of command line tools): ```ts import { checkNode } from '@jsii/check-node'; // ... checkNode(); // ... ``` Alternatively, import `@jsii/check-node/run` in the location where the check should be performed. This is particularly useful when some of the modules imported by a command line tool may fail loading in unsupported runtimes, and hence the check must run before these are imported. ```ts import '@jsii/check-node/run'; ```