This package contains the Flow parser in its compiled-to-JavaScript form.

See flow.org. The code for the Flow parser lives on GitHub.

The Flow Parser is a JavaScript parser written in OCaml. It produces an AST that conforms to the ESTree spec and that mostly matches what esprima produces. The Flow Parser can be compiled to native code or can be compiled to JavaScript using js_of_ocaml. This npm package contains the Flow parser compiled to JavaScript.

You can use the Flow parser in your browser or in node. To use in node you can just do

require('flow-parser').parse('1+1', {});

To use in the browser, you can add

<script src="flow_parser.js"></script>

which will make the flow object available to use like so:

flow.parse('1+1', {});

The second argument to flow.parse is the options object. Currently supported options:

• types (boolean, default true) - enable parsing of Flow types
• use_strict (boolean, default false) - treat the file as strict, without needing a "use strict" directive
• comments (boolean, default true) - attach comments to AST nodes (leadingComments and trailingComments)
• all_comments (boolean, default true) - include a list of all comments from the whole program
• tokens (boolean, default false) - include a list of all parsed tokens in a top-level tokens property

• enums (boolean, default false) - enable parsing of enums
• match (boolean, default false) - enable parsing of match expressions and match statements
• components (boolean, default false) - enable parsing of component syntax
• assert_operator (boolean, default false) - enable parsing of the assert operator
• esproposal_decorators (boolean, default false) - enable parsing of decorators