JavaScript, HTML, CSS
REPL & Playground
Quickly test and share your code snippets.
Ideal for learning and prototyping.
Get instant feedback as you type
The results of JavaScript expressions are displayed in real time.
TypeScript by default
Because we love TypeScript.
Of course, you can write in plain JavaScript as well.
Import NPM packages with ease
Just type `import smth from 'npm-package'`.
There is no step 2. Types are included.
Tailwind CSS for fast prototyping
We live in modern times, don't we?
Tailwind CSS is enabled by default. IntelliSense included.
Prettier for code formatting
Because you shouldn't waste time on formatting while prototyping.
JSX/TSX is ready to go
Use React JSX for prototyping dynamic UIs.
Live feedback
JavaScript expressions are evaluated and their results are displayed in real time instantly. Live feedback gives you tangible productivity boost when prototyping.
You still have the power to debug your code using `` statements, thanks to the source maps, and, of course, you can use your favorite `console.log` just as you like :).
NPM packages
There's no need to dance around it. Just import NPM packages in the code as you do it normally.., but only skipping the step of installing them.
Package types (if provided) will be automatically available for IntelliSense in the editor.
Browser environment
No emulation, no limitations. The code is executed in the browser environment, so you have full DOM access, and all the browser APIs available.
Enjoy tinkering with HTML and see the result in the Preview window.
TypeScript
TypeScript is on board. Monaco editor gives you amazing IntelliSense & code completion out of the box.
Tailwind CSS
Tailwind CSS is enabled by default. It works as you expect: in TS/TSX, HTML, and CSS. Tailwind CSS IntelliSense (autocomplete, linting, hover previews) works as well.
The Preview window sets the Dark Mode for you, if you use a dark theme in the editor.
JSX/TSX
You can use React JSX in the code to tinker with dynamic UIs & reactive state.
Prettier
Format your code using Prettier by pressing ⌘+S.
There's nothing more to say.
Themes
We all love themes. JSREPL offers some themes to choose from.
The one used here in videos is Monokai.
Security
You can share Repl with anyone. Anyone can share Repl with you. Security is important when you run untrusted code. The code evaluates in a cross-domain iframe, which do not have access to anything sensitive outside the untrusted domain.
For example, if you used your GitHub account to sign in, the code will not have access to it and its session cookies.
