#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

#7 in Text editors

Download history 36/week @ 2021-07-02 80/week @ 2021-07-09 55/week @ 2021-07-16 72/week @ 2021-07-23 105/week @ 2021-07-30 102/week @ 2021-08-06 80/week @ 2021-08-13 72/week @ 2021-08-20 58/week @ 2021-08-27 77/week @ 2021-09-03 677/week @ 2021-09-10 462/week @ 2021-09-17 362/week @ 2021-09-24 770/week @ 2021-10-01 394/week @ 2021-10-08 266/week @ 2021-10-15

866 downloads per month
Used in 8 crates (5 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
~52K SLoC