#incremental #parsing #javascript

tree-sitter-javascript

JavaScript grammar for the tree-sitter parsing library

4 releases (2 breaking)

0.20.0 Oct 4, 2021
0.19.1 Oct 4, 2021
0.19.0 Mar 3, 2021
0.16.0 Oct 27, 2020

#116 in Web programming

Download history 514/week @ 2022-03-08 1901/week @ 2022-03-15 1450/week @ 2022-03-22 1381/week @ 2022-03-29 1154/week @ 2022-04-05 1126/week @ 2022-04-12 1057/week @ 2022-04-19 972/week @ 2022-04-26 724/week @ 2022-05-03 886/week @ 2022-05-10 1381/week @ 2022-05-17 2000/week @ 2022-05-24 1708/week @ 2022-05-31 2517/week @ 2022-06-07 2251/week @ 2022-06-14 2261/week @ 2022-06-21

9,142 downloads per month
Used in 7 crates (4 directly)

MIT license

2MB
76K SLoC

C 75K SLoC // 0.0% comments JavaScript 1K SLoC // 0.0% comments Scheme 278 SLoC // 0.1% comments Rust 35 SLoC // 0.1% comments

tree-sitter-javascript

This crate provides a JavaScript grammar for the tree-sitter parsing library. To use this crate, add it to the [dependencies] section of your Cargo.toml file. (Note that you will probably also need to depend on the tree-sitter crate to use the parsed result in any useful way.)

[dependencies]
tree-sitter = "0.20"
tree-sitter-javascript = "0.20"

Typically, you will use the language function to add this grammar to a tree-sitter Parser, and then use the parser to parse some code.

The below example demonstrates a simple program that parses a JavaScript function and prints the result to your terminal.

use tree_sitter::Parser;

fn main() {
    let code = r#"
    function double(x) {
        return x * 2;
    }
"#;
    let mut parser = Parser::new();
    parser
        .set_language(tree_sitter_javascript::language())
        .expect("Error loading JavaScript grammar");
    let parsed = parser.parse(code, None);
    println!("{:#?}", parsed);
}

If you have any questions, please reach out to us in the tree-sitter discussions page.

Dependencies

~1.4–2MB
~51K SLoC