slides
astexplorer
slides | astexplorer | |
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6 | 43 | |
176 | 5,953 | |
- | - | |
5.2 | 6.0 | |
3 months ago | 8 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.
slides
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MarkedText - healthy person MarkDown
Hello, my name is Dmitriy Karlovskiy and all my articles (and presentations) I write in MarkDown. And you know what? It's already pretty sick of me! I write texts in Russian, but most of the special characters are only in the English keyboard layout. And editing tables is the eternal Leaning Tower of Pisa from vertical lines. In short, is has problems both with the convenience of editing and with the readability. So let's try to design it from scratch, without dragging tons of puzzling structures along with us.
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What is wrong with SOURCE MAPS and how not to mess with them?
Framework $mol
- Tree – AST Which Kills JSON, XML, YAML, TOML, etc.
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Tree - AST which kills JSON, XML, YAML, TOML, etc
This is an extended text version of the speech of the same name on PiterJS#47. You can read it as an article or open it in the presentation interface or watch video.
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Main aspects of reactivity
Original Russian article
astexplorer
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Understanding Code Structure: A Beginner's Guide to Tree-sitter
You can play with your code here, and visualise ASTs for the same.
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What is an Abstract Syntax Tree in Programming?
Website
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How to create your own Eslint rule with tests, boosting the DX, and code-review
To understand this syntax, I recommend exploring AST Explorer. You will have a better view of how the AST of JavaScript works and how to correlate it with the Eslint syntaxy:
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Programming from Top to Bottom - Parsing
You can never mistake type_declaration with an identifier, otherwise the program will not work. Aside from that constraint, you are free to name them whatever you like, there is no one standard, and each parser has it own naming conventions, unless you are planning to use something like LLVM. If you are interested, you can see examples of naming in different language parsers in the AST Explorer.
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ESLint: under the hood
The rule that I want to write will be called not-allows-underscore: the idea is to abolish the use of underscores when declaring variables or functions. It's a real dummy rule, but it should be enough to see in action the concepts that we have discussed earlier. The first thing that I would do is to go to AST Explorer, write down a code that declares variables and functions (both standard and arrows one) and take a look at what type of node is the one that encodes the identifier. Doing that, I found out that the node type of my interest is Identifier, what a surprise! 🤣. In particular, the structure of the node holds the string used as identifier in the name property.
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😱 ESlint over Conventions - You have Not unlocked the power of ESlint 😱
All the information about the API, AST node names, AST Explorer, etc. you can read in the official documentation. I’m just going to show examples of how to automate the check-up of our created conventions.
- AST Exploret
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200 Web-Based, Must-Try Web Design and Development Tools
AST Viewer
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Building a JSON Parser from scratch with JS 🤯
If you want to see how the AST of popular languages looks, I recommend the AST Explorer. It supports various languages, and you can view the complete AST and navigate through the nodes. If you want to go further, you can try to copy some logic from an existing parser and implement it in your own, such as calculating an expression according to precedence order, for example: 1 + 2 * 3 (which is 7, not 9).
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Creating my own typescript compiler
https://astexplorer.net/ is a good resource/playground for understanding ASTs and transpilers.
What are some alternatives?
marked.hyoo.ru - MarkedText - simpliest usefull lightweight markup language, better alternative to MarkDown
deno_swc - The SWC compiler for Deno.
moz-sql-parser - DEPRECATED - Let's make a SQL parser so we can provide a familiar interface to non-sql datastores!
gogocode - GoGoCode is a transformer for JavaScript/Typescript/HTML based on AST but providing a more intuitive API.
atom-language-tree - Tree format support in Atom
vscode-language-tree - VSCode tree format support
Smol-sublime - Sublime syntax-highlighting for *.view.tree of $mol
ChakraCore - ChakraCore is an open source Javascript engine with a C API.
Acorn - A small, fast, JavaScript-based JavaScript parser
Babel (Formerly 6to5) - 🐠 Babel is a compiler for writing next generation JavaScript.
proposal-type-annotations - ECMAScript proposal for type syntax that is erased - Stage 1