Truncate a string in the middle to a specified length.
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> Truncate a string in the middle to a specified length.
``bash`
npm install @stdlib/string-truncate-middle
`javascript`
var truncateMiddle = require( '@stdlib/string-truncate-middle' );
#### truncate( str, len\[, seq] )
Truncates a string in the middle to a specified length.
`javascript`
var out = truncateMiddle( 'beep boop', 7 );
// returns 'be...op'
By default, the truncated string uses the replacement sequence '...'. To customize the replacement sequence, provide a seq argument:
`javascript
var out = truncateMiddle( 'beep boop', 7, '!' );
// returns 'bee!oop'
out = truncateMiddle( 'beep boop', 7, '!!!' );
// returns 'be!!!op'
`
`javascript
var truncateMiddle = require( '@stdlib/string-truncate-middle' );
var str = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.';
var out = truncateMiddle( str, 15 );
// returns 'Lorem ... elit.'
str = 'To be or not to be, that is the question';
out = truncateMiddle( str, 19, '|' );
// returns 'To be or | question'
str = 'The quick fox jumps over the lazy dog.';
out = truncateMiddle( str, 28, '...' );
// returns 'The quick fox...he lazy dog.'
str = '🐺 Wolf Brothers 🐺';
out = truncateMiddle( str, 7 );
// returns '🐺 ... 🐺'
str = '🐺 Wolf Pack 🐺';
out = truncateMiddle( str, 7, '🐺🐺🐺' );
// returns '🐺 🐺🐺🐺 🐺'
`
- [@stdlib/string-truncate-middle-cli][@stdlib/string-truncate-middle-cli]: CLI package for use as a command-line utility.
- [@stdlib/string-truncate][@stdlib/string/truncate]: truncate a string to a specified length.
*
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].
[@stdlib/string-truncate-middle-cli]: https://www.npmjs.com/package/@stdlib/string-truncate-middle-cli
[npm-image]: http://img.shields.io/npm/v/@stdlib/string-truncate-middle.svg
[npm-url]: https://npmjs.org/package/@stdlib/string-truncate-middle
[test-image]: https://github.com/stdlib-js/string-truncate-middle/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/string-truncate-middle/actions/workflows/test.yml?query=branch:v0.2.3
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/string-truncate-middle/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/string-truncate-middle?branch=main
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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-truncate-middle#cli
[cli-url]: https://github.com/stdlib-js/string-truncate-middle/tree/cli
[@stdlib/string-truncate-middle]: https://github.com/stdlib-js/string-truncate-middle/tree/main
[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-truncate-middle/tree/deno
[deno-readme]: https://github.com/stdlib-js/string-truncate-middle/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/string-truncate-middle/tree/umd
[umd-readme]: https://github.com/stdlib-js/string-truncate-middle/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/string-truncate-middle/tree/esm
[esm-readme]: https://github.com/stdlib-js/string-truncate-middle/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/string-truncate-middle/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/string-truncate-middle/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/truncate]: https://www.npmjs.com/package/@stdlib/string-truncate