ast parser

[lambtron]

deno parse to get the ast of html, js, xml any

origin: https://discord.com/channels/684898665143206084/769285344809451572/769323040324452352

for reference: https://www.npmjs.com/package/abstract-syntax-tree

[littledivy]

• https://deno.land/x/swc (SWC parser/transformer compiled to WASM)
• https://deno.land/x/css (CSS parser; it will use Servo's CSS parser via WASM soon)

[tjosepo]

Recast works if you import it from jspm and use the TypeScript parser:

import { parse } from "https://jspm.dev/npm:recast";
import TSParser from "https://jspm.dev/npm:recast/parsers/typescript";

// Let's turn this function declaration into a variable declaration.
const code = [
  "function add(a: number, b: number): number {",
  "  return a +",
  "    // Weird formatting, huh?",
  "    b;",
  "}"
].join("\n");

// Parse the code using an interface similar to require("esprima").parse.
const ast = parse(code, { parser: TSParser });
console.log(ast);

[jollytoad]

https://github.com/syntax-tree/unist ... an excellent ecosystem of syntax trees, and utilities (in the wider Unified ecosystem).

Mostly focused around markup languages (html, xml, markdown) rather than code, but there isn't anything to prevent unist based ASTs being created for programming languages.

I've found many of these libraries already work really well in Deno imported via esm.sh