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acorn-extract-comments

Extract JavaScript code comments from a string, using acorn.

Install

npm i acorn-extract-comments --save

Usage

For more use-cases see the tests

const extract = require('acorn-extract-comments')

acornExtractComments

Extract all code comments, including block/line and also these that are marked as "ignored" like (//! and /*!)

Params

• <input> {String}: string from which to get comments
• [opts] {Object}: optional options, passed to acorn
  • ast {Boolean}: if true the ast is added to the resulting array
  • line {Boolean}: if false get only block comments, default true
  • block {Boolean}: if false get line comments, default true
  • preserve {Boolean|Function}: if true will get only comments that are not ignored
  • locations {Boolean}: if true result will include acorn location object
  • ecmaVersion {Number}: defaults to 6, acorn parsing version
• returns {Array}: can have .ast property if opts.ast: true

Example

const fs = require('fs')
const extract = require('acorn-extract-comments')

const str = fs.readFileSync('./index.js', 'utf8')
const comments = extract(str, {})
// => ['array', 'of', 'all', 'code', 'comments']

.line

Extract only line comments.

Params

• <input> {String}: string from which to get comments
• [opts] {Object}: optional options, passed to acorn
• returns {Array}: can have .ast property if opts.ast: true

Example

const comments = extract(str, {block: false})
// => ['array', 'of', 'line', 'comments']

or through method

const comments = extract.line(str)
// => ['all', 'line', 'comments']

.block

Extract only block comments.

Params

• <input> {String}: string from which to get comments
• [opts] {Object}: optional options, passed to acorn
• returns {Array}: can have .ast property if opts.ast: true

Examples

const comments = extract(str, {line: false})
// => ['array', 'of', 'block', 'comments']

or through method

const comments = extract.block(str)
// => ['array', 'of', 'block', 'comments']

Contributing

Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
But before doing anything, please read the CONTRIBUTING.md guidelines.

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