react-codemod
Acorn
react-codemod | Acorn | |
---|---|---|
9 | 13 | |
4,059 | 10,230 | |
0.1% | 0.8% | |
3.2 | 7.9 | |
3 days ago | 17 days ago | |
JavaScript | JavaScript | |
MIT License | MIT License |
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.
react-codemod
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Converting class based components into functional ones
You can convert the “easy” render-only class components to function components using the pure-component codemod.
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Front-end Guide
Developer Experience - There are a number of tools that improves the development experience with React. React Developer Tools is a browser extension that allows you to inspect your component, view and manipulate its props and state. Hot reloading with webpack allows you to view changes to your code in your browser, without you having to refresh the browser. Front end development involves a lot of tweaking code, saving and then refreshing the browser. Hot reloading helps you by eliminating the last step. When there are library updates, Facebook provides codemod scripts to help you migrate your code to the new APIs. This makes the upgrading process relatively pain-free. Kudos to the Facebook team for their dedication in making the development experience with React great.
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A new way to ship Codemods
Like most popular libraries, e.g. React, Next.js and more, which provide codemods to help move their huge user base across versions, we needed a bespoke and fairly simple CLI wrapper of jscodeshift, that would provide a means of publishing, downloading and running codemods. So we created a custom 'codemod-cli', our first piece of internal codemod infrastructure.
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React v18.0
If you'd like to migrate them, the React team maintains some awesome codemods:
https://github.com/reactjs/react-codemod
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[AskJS] How do you release libraries updates with breaking changes?
Codemods - providing automated tooling to change old patterns to new ones can go a long way in helping drive adoption of the new version. The most notable example of doing this is react-codemod (many other examples exist)
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All about Abstract Syntax Tree
Sometimes you need to migrate from one version of a library to another, for example, when React has updated to version 15.5 the PropTypes has moved to different package and the react-developers provides codemod for migration.
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Modern JavaScript:Everything you missed over the last 10 years(ECMAScript 2020)
Can you point me towards examples of the usage of AST rewriting tools that are actively being used by open-source library maintainers in other ecosystems to help their consumers do upgrades in large code-bases (e.g. I can see that `clang` has AST tooling, but I don't see examples online of this being widely used: https://devblogs.microsoft.com/cppblog/exploring-clang-tooli...).
Within the JavaScript ecosystem this is quite popular (1. https://github.com/reactjs/react-codemod; 2. https://github.com/mui-org/material-ui/tree/HEAD/packages/ma... 3. https://github.com/emotion-js/emotion/tree/main/packages/esl... etc.) Teams that maintain huge codebases have tooling to safely automate their upgrades and the best library maintainers provide their consumers with these AST transformations.
> Don't tell that to anyone who uses
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Introducing Astra: A Tool for Refactoring Java Programs at Scale
Agree. I know js has a similar tool, jscodeshift. https://github.com/reactjs/react-codemod and https://github.com/cpojer/js-codemod/tree/master/transforms have some ideas for js.
- React 17 DOM tree inside of React 16.2 DOM
Acorn
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Abstract Syntax Trees and Practical Applications in JavaScript
Why do we then have other JavaScript parsers like babel parser, swc parser, acorn, espree and the likes since JavaScript engines have their own internal parsers?
- Árvore de sintaxe abstrata, oque são e aonde vivem.
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Regex for any js string for representing an object or array containing any number of array or object?
If you're trying to determine if a string is valid Javascript then your best bet is to use a JS parser like Acorn. Trying to DIY parsing with just regex is a good way to end up incredibly frustrated.
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Code Art — abstract artworks for your creations
To render UI I use Svelte. To parse JS files I use Acorn JS in Web Worker.
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What is Babel? And SWC?
Behind Babel is created by an Australian developer Sebastian McKenzie and now consists a small team of contributors. Babel also makes uses a polyfill library called core-js, which in turn uses a JavaScript parser, acorn.
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🕶 What it takes to build a Static Analysis tool
At line 3, we import parseScript from meriyah which is a JavaScript parser (could have been babel, acorn, swc, etc doesn't matter for our use case as long as they correctly implement the spec).
- Acorn: A lightweight PaaS for Kubernertes, from Rancher founders
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[AskJS] What is your preferred tooling when working with JS ASTs?
A simple starting point is Acorn with estree-walker. Not sure if you'll need more advanced functionality but that pair has worked well for my usage. It's also the combo that Svelte uses internally.
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How do I edit an AST while parsing it?
https://github.com/acornjs/acorn For parsing the tree
- Show HN: Monocle – bidirectional code generation library
What are some alternatives?
jscodeshift - A JavaScript codemod toolkit.
babel-parser
react-gradual-upgrade-demo - Demonstration of how to gradually upgrade an app to a new version of React
esprima - ECMAScript parsing infrastructure for multipurpose analysis
codemod-example - Codemod for my article: https://blog.paulcodes.tech/all-about-abstract-syntax-tree
cherow
betaflight-configurator - Cross platform configuration tool for the Betaflight firmware
Rocambole - Recursively walk and transform EcmaScript AST
js-codemod - Codemod scripts to transform code to next generation JS
Error Prone - Catch common Java mistakes as compile-time errors
Babel (Formerly 6to5) - 🐠 Babel is a compiler for writing next generation JavaScript.