owl VS ts-jest

Compare owl vs ts-jest and see what are their differences.


OWL: A web framework for structured, dynamic and maintainable applications (by odoo)


A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript. (by kulshekhar)
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owl ts-jest
1 16
518 6,124
3.1% -
9.4 9.7
8 days ago 8 days ago
JavaScript TypeScript
GNU General Public License v3.0 or later MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of owl. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-04-10.


Posts with mentions or reviews of ts-jest. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-09-12.
  • Is using Jest for anything other than React a bad idea?
    3 projects | reddit.com/r/node | 12 Sep 2022
    ts-jest has had some strange performance issues and workarounds in the past, though I haven’t used it very recently so it might have fixed those by now.
  • Test-Driven Infrastructure Development with Pulumi and Jest
    8 projects | dev.to | 14 Jun 2022
    Since we're working with TypeScript, we can use ts-jest, which conveniently brings Jest along for the ride:
  • Improve your Testing with Custom Matchers in Jest
    2 projects | dev.to | 18 May 2022
    I want to save you from manually copying the snippets one by one, so here is a Gist with the complete test file. This can be easily executed with Jest (or ts-jest for TypeScript).
  • Testing Mongoose with Ts-Jest
    3 projects | dev.to | 20 Apr 2022
  • A complete guide to full-stack live reload
    9 projects | dev.to | 16 Mar 2022
    See the Jest configuration docs to learn more about Jest configuration. ts-jest also has good documentation.
  • Setup Jest to React Typescript Vite project, also SWC (part 1)
    13 projects | dev.to | 14 Mar 2022
    Using @swc/jest to compile code to CommonJS is much faster than babel-jest, ts-jest which have long cold starts when executing tests in a large project.
  • Component Testing in Svelte
    6 projects | dev.to | 19 Feb 2022
    ts-jest: A transformer for handling TypeScript files.
  • The Ultimate Guide to TypeScript Monorepos
    17 projects | dev.to | 26 Nov 2021
    Thankfully using TypeScript and TypeScript project references makes the intricate problem of using Jest easier since we can make use of the excellent ts-jest Jest transformer. All we need to do it point ts-jest to the respective tsconfig.json file for each package (see example jest.config.js). Since we have configured TypeScript to be composite and incremental, we do not need to recompile TypeScript for dependencies of a package we want to test, which significantly reduces the runtime for unit tests. ts-jest will also ensure that any error message will reference the line numbers in the source TypeScript files.
  • Testing Svelte components with Jest and Vite
    8 projects | dev.to | 18 Nov 2021
    We need to configure Jest to transform our files. We must explicitly set our test environment to jsdom, which we are using through Jest. Since v27 Jest's default test environment is node. I will put the configuration in a specific Jest configuration file called jest.config.json in the project root folder. If you create a configuration file called jest.config.js, Vite will complain as it expects only ESM JavaScript by default. Vite will recommend that you rename it to a ".cjs" file if you want to do it that way. You can look at the different ways to configure Jest if you are unsure about the file conventions. If you're using TypeScript, you need to configure svelte-preprocess and ts-jest also, see the svelte-jester docs for how to do that.
  • What does it take to support Node.js ESM?
    9 projects | dev.to | 12 Aug 2021
    There are workarounds, but nothing actually works in 100% of the possible use-cases (see for example, ts-jest issue), and for that reason, we recommend tooling that enables this type of building without needing any workaround, usually using Rollup and/or esbuild.

What are some alternatives?

When comparing owl and ts-jest you can also consider the following projects:

jest - Super-fast alternative for babel-jest or ts-jest without type checking

esbuild - An extremely fast JavaScript and CSS bundler and minifier

bob-esbuild - Building and Running TypeScript projects efficiently with rollup + esbuild

tsc-esm-fix - Make TS projects compatible with esm/mjs requirements

SvelteKit - The fastest way to build Svelte apps

tsup - The simplest and fastest way to bundle your TypeScript libraries.

vite - Next generation frontend tooling. It's fast!

svelte-preprocess - A ✨ magical ✨ Svelte preprocessor with sensible defaults and support for: PostCSS, SCSS, Less, Stylus, Coffeescript, TypeScript, Pug and much more.

parcel - The zero configuration build tool for the web. 📦🚀

plugins - 🍣 The one-stop shop for official Rollup plugins

svelte-vite-jest-template - Svelte template based on Vite's Svelte template, but includes unit testing setup (Jest and Svelte Testing Library).

chokidar - Minimal and efficient cross-platform file watching library