strip-comments

Strip line and/or block comments from a string. Blazing fast, and works with JavaScript, Sass, CSS, Less.js, and a number of other languages.

Please consider following this project's author, Jon Schlinkert, and consider starring the project to show your :heart: and support.

• Install
• What does this do?
• Usage
• API
• About

Install

Install with npm (requires Node.js >=10):

$ npm install --save strip-comments

What does this do?

Takes a string and returns a new string with comments removed. Works with line comments and/or block comments. Optionally removes the first comment only or ignores protected comments.

Works with:

• ada
• apl
• applescript
• c
• csharp
• css
• hashbang
• haskell
• java
• javascript
• less
• lua
• matlab
• ocaml
• pascal
• perl
• php
• python
• ruby
• sass
• shebang
• sql
• swift
• typscript
• xml

Usage

By default all comments are stripped.

const strip = require('strip-comments');
const str = strip('const foo = "bar";// this is a comment\n /* me too *\/');
console.log(str);
// => 'const foo = "bar";\n'

For more use-cases see the tests

API

strip

Strip all code comments from the given input, including protected comments that start with !, unless disabled by setting options.keepProtected to true.

Params

• input {String}: string from which to strip comments
• options {Object}: optional options, passed to extract-comments

• line {Boolean}: if false strip only block comments, default true
• block {Boolean}: if false strip only line comments, default true
• keepProtected {Boolean}: Keep ignored comments (e.g. /*! and //!)
• preserveNewlines {Boolean}: Preserve newlines after comments are stripped

• returns {String}: modified input

Example

const str = strip('const foo = "bar";// this is a comment\n /* me too */');
console.log(str);
// => 'const foo = "bar";'

.block

Strip only block comments.

Params

• input {String}: string from which to strip comments
• options {Object}: pass opts.keepProtected: true to keep ignored comments (e.g. /*!)
• returns {String}: modified string

Example

const strip = require('..');
const str = strip.block('const foo = "bar";// this is a comment\n /* me too */');
console.log(str);
// => 'const foo = "bar";// this is a comment'

.line

Strip only line comments.

Params

• input {String}: string from which to strip comments
• options {Object}: pass opts.keepProtected: true to keep ignored comments (e.g. //!)
• returns {String}: modified string

Example

const str = strip.line('const foo = "bar";// this is a comment\n /* me too */');
console.log(str);
// => 'const foo = "bar";\n/* me too */'

.first

Strip the first comment from the given input. Or, if opts.keepProtected is true, the first non-protected comment will be stripped.

Params

• input {String}
• options {Object}: pass opts.keepProtected: true to keep comments with !
• returns {String}

Example

const output = strip.first(input, { keepProtected: true });
console.log(output);
// => '//! first comment\nfoo; '

.block

Parses a string and returns a basic CST (Concrete Syntax Tree).

Params

• input {String}: string from which to strip comments
• options {Object}: pass opts.keepProtected: true to keep ignored comments (e.g. /*!)
• returns {String}: modified string

Example

const strip = require('..');
const str = strip.block('const foo = "bar";// this is a comment\n /* me too */');
console.log(str);
// => 'const foo = "bar";// this is a comment'

About

$ npm install && npm test

$ npm install -g verbose/verb#dev verb-generate-readme && verb

Related projects

You might also be interested in these projects:

• code-context: Parse a string of javascript to determine the context for functions, variables and comments based… more | homepage
• extract-comments: Uses esprima to extract line and block comments from a string of JavaScript. Also optionally… more | homepage
• parse-code-context: Fast and simple way to parse code context for use with documentation from code comments… more | homepage
• parse-comments: Parse code comments from JavaScript or any language that uses the same format. | homepage

Contributors

| Commits | Contributor |
| --- | --- |
| 82 | jonschlinkert |
| 4 | tunnckoCore |
| 2 | mk-pmb |
| 1 | kgryte |
| 1 | briandipalma |
| 1 | epicoxymoron |
| 1 | XuluWarrior |

Author

Jon Schlinkert

• GitHub Profile
• Twitter Profile
• LinkedIn Profile

License

Copyright © 2019, Jon Schlinkert. Released under the MIT License.