ESM Unit vs Karma
ESM Unit
github.comKarma
karma-runner.github.ioSide by side
| Figure | ESM Unit | Karma |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 0 | 1 |
| Spec score · JavaScript Testing Frameworks | 7.3 (#15) | 8.2 (#3) |
| License | The repository license identifies the software as Apache License 2.0 and states that it is provided without warranties or conditions. | Karma is released under the MIT license. |
| Purpose | ESM Unit is a unit testing tool for native ECMAScript modules in web browsers. | Karma runs JavaScript tests in multiple real browsers and reports results to developers. |
| Support | The project README invites users to open an issue or pull request and says it welcomes contributions. | The project directs questions to its mailing list or Gitter and says the issue tracker is for bug reports and feature discussions. |
Plans
In their own words
Karma
Karma is a JavaScript test runner that starts a web server, connects browsers, runs tests, and reports results to developers. It can watch configured files and rerun tests when they change. Plugins connect frameworks such as Jasmine, Mocha, and QUnit, alongside preprocessors, reporters, and browser launchers. Documented launchers include Chrome, Firefox, Safari, PhantomJS, JSDOM, Opera, Internet Explorer, SauceLabs, and BrowserStack. A browser on another device on the same network, including a phone or tablet, can be captured by visiting the Karma server URL. Karma runs on Node.js and is distributed as an npm package; its installation guide recommends installing it locally in a project. Documentation includes integration guides for Travis CI, Jenkins, and Semaphore CI. The project describes Karma as primarily designed for low-level unit testing and points to Protractor for high-level testing. Karma is free and MIT-licensed, but deprecated: it accepts no new features or general bug fixes. Critical security fixes continue until 12 months after Angular CLI’s Web Test Runner support is marked stable.