Jasmine
DOM-less simple JavaScript testing framework
Sinon.js
Test spies, stubs and mocks for JavaScript.
Stencil
A Web Component compiler for building fast, reusable UI components and Progressive Web Apps 💎 Built by the Ionic Framework team
Testcafe
A Node.js tool to automate end-to-end web testing.
Qunit
An easy-to-use JavaScript Unit Testing framework.
Reef
A lightweight library for creating reactive, state-based components and UI.
Ar.js
Image tracking, Location Based AR, Marker tracking. All on the Web.
Jquery Mockjax
The jQuery Mockjax Plugin provides a simple and extremely flexible interface for mocking or simulating ajax requests and responses
Dotenv Linter
⚡️Lightning-fast linter for .env files. Written in Rust 🦀
Xv
:x: :heavy_check_mark: A beautifully simple and capable test runner
Csscritic
A lightweight framework for regression testing of Cascading Style Sheets
Holder
Holder renders image placeholders entirely on the client side.
Spa Eye
Backbone debugger for Firefox
Screenlog.js
Bring console.log on the screen
Angular Debaser
Just a better way to test AngularJS apps.
Prettydiff
Compare code instead of text.
Pioneer
Integration Testing