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Setup

If you're running your tests in the browser bundled with webpack (or similar) then DOM Testing Library should work out of the box for you. However, most people using DOM Testing Library are using it with the Jest testing framework with the testEnvironment set to jest-environment-jsdom (which is the default configuration with Jest).

Using Without Jest

jsdom is a pure JavaScript implementation of the DOM and browser APIs that runs in node. If you're not using Jest and you would like to run your tests in Node, then you must install jsdom yourself. There's also a package called jsdom-global which can be used to setup the global environment to simulate the browser APIs.

First, install jsdom and jsdom-global.

npm install --save-dev jsdom jsdom-global

With mocha, the test command would look something like this:

mocha --require jsdom-global/register

Note, depending on the version of Node you're running, you may also need to add core-js and regenerator-runtime (if you're using babel 7) or babel-polyfill (for babel 6).