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Node.js environment

When to test​

  • Your package runs in Node.js

What to test​

Test that your package works in Node.js. This is especially important if your package can also run in a browser, since there are many differences between the two environments.

How to set up​

If you’re using Jest, you can make sure the testEnvironment configuration option is set to node, and not the default of jsdom. You can also run node directly in your test project’s test script, like:

test-projects/node/package.json
{
    "scripts": {
        "test": "node index.js"
    }
}

Common problems to watch for​

Unavailable global variables​

Some global variables, like window won’t be available in Node.js.

console.log(window); // ReferenceError: window is not defined