Convert a string to constant case.
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> Convert a string to constant case.
To use as a general utility, install the CLI package globally
``bash`
npm install -g @stdlib/string-constantcase-cli
`text
Usage: constantcase [options] [
Options:
-h, --help Print this message.
-V, --version Print the package version.
--split sep Delimiter for stdin data. Default: '/\\r?\\n/'.
`
`bash`
$ constantcase 'hello world'
HELLO_WORLD
To use as a [standard stream][standard-streams],
`bash`
$ echo -n 'beEp booP' | constantcase
BEEP_BOOP
By default, when used as a [standard stream][standard-streams], the implementation assumes newline-delimited data. To specify an alternative delimiter, set the split option.
`bash`
$ echo -n 'beep_boop\tisMobile' | constantcase --split '\t'
BEEP_BOOP
IS_MOBILE
- [@stdlib/string-constantcase][@stdlib/string-constantcase]: convert a string to constant case.
- [@stdlib/string-camelcase][@stdlib/string/camelcase]: convert a string to camel case.
- [@stdlib/string-kebabcase][@stdlib/string/kebabcase]: convert a string to kebab case.
- [@stdlib/string-pascalcase][@stdlib/string/pascalcase]: convert a string to Pascal case.
- [@stdlib/string-snakecase][@stdlib/string/snakecase]: convert a string to snake case.
*
This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].
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---
See [LICENSE][stdlib-license].
Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
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[test-url]: https://github.com/stdlib-js/string-constantcase/actions/workflows/test.yml?query=branch:v0.2.3
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[chat-url]: https://stdlib.zulipchat.com
[stdlib]: https://github.com/stdlib-js/stdlib
[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors
[cli-section]: https://github.com/stdlib-js/string-constantcase#cli
[cli-url]: https://github.com/stdlib-js/string-constantcase/tree/cli
[@stdlib/string-constantcase]: https://www.npmjs.com/package/@stdlib/string-constantcase
[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules
[deno-url]: https://github.com/stdlib-js/string-constantcase/tree/deno
[deno-readme]: https://github.com/stdlib-js/string-constantcase/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/string-constantcase/tree/umd
[umd-readme]: https://github.com/stdlib-js/string-constantcase/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/string-constantcase/tree/esm
[esm-readme]: https://github.com/stdlib-js/string-constantcase/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/string-constantcase/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/string-constantcase/main/LICENSE
[standard-streams]: https://en.wikipedia.org/wiki/Standard_streams
[mdn-regexp]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
[@stdlib/string/camelcase]: https://www.npmjs.com/package/@stdlib/string-camelcase
[@stdlib/string/kebabcase]: https://www.npmjs.com/package/@stdlib/string-kebabcase
[@stdlib/string/pascalcase]: https://www.npmjs.com/package/@stdlib/string-pascalcase
[@stdlib/string/snakecase]: https://www.npmjs.com/package/@stdlib/string-snakecase