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GitHub - sindresorhus/slugify: Slugify a string

Slugify a string

Useful for URLs, filenames, and IDs.

It handles most major languages, including German (umlauts), Vietnamese, Arabic, Russian, and more.

$ npm install @sindresorhus/slugify

import slugify from '@sindresorhus/slugify';

slugify('I ♥ Dogs');
//=> 'i-love-dogs'

slugify('  Déjà Vu!  ');
//=> 'deja-vu'

slugify('fooBar 123 $#%');
//=> 'foo-bar-123'

slugify('я люблю единорогов');
//=> 'ya-lyublyu-edinorogov'

Type: string

String to slugify.

Type: object

Type: string
Default: '-'

import slugify from '@sindresorhus/slugify';

slugify('BAR and baz');
//=> 'bar-and-baz'

slugify('BAR and baz', {separator: '_'});
//=> 'bar_and_baz'

slugify('BAR and baz', {separator: ''});
//=> 'barandbaz'

Type: boolean
Default: true

Make the slug lowercase.

import slugify from '@sindresorhus/slugify';

slugify('Déjà Vu!');
//=> 'deja-vu'

slugify('Déjà Vu!', {lowercase: false});
//=> 'Deja-Vu'

Type: boolean
Default: true

Convert camelcase to separate words. Internally it does fooBar → foo bar.

import slugify from '@sindresorhus/slugify';

slugify('fooBar');
//=> 'foo-bar'

slugify('fooBar', {decamelize: false});
//=> 'foobar'

Type: Array<string[]>
Default: [ ['&', ' and '], ['🦄', ' unicorn '], ['♥', ' love '] ]

Add your own custom replacements.

The replacements are run on the original string before any other transformations.

This only overrides a default replacement if you set an item with the same key, like &.

import slugify from '@sindresorhus/slugify';

slugify('Foo@unicorn', {
	customReplacements: [
		['@', 'at']
	]
});
//=> 'fooatunicorn'

Add a leading and trailing space to the replacement to have it separated by dashes:

import slugify from '@sindresorhus/slugify';

slugify('foo@unicorn', {
	customReplacements: [
		['@', ' at ']
	]
});
//=> 'foo-at-unicorn'

Another example:

import slugify from '@sindresorhus/slugify';

slugify('I love 🐶', {
	customReplacements: [
		['🐶', 'dogs']
	]
});
//=> 'i-love-dogs'

Type: boolean
Default: false

If your string starts with an underscore, it will be preserved in the slugified string.

Sometimes leading underscores are intentional, for example, filenames representing hidden paths on a website.

import slugify from '@sindresorhus/slugify';

slugify('_foo_bar');
//=> 'foo-bar'

slugify('_foo_bar', {preserveLeadingUnderscore: true});
//=> '_foo-bar'

Type: boolean
Default: false

If your string ends with a dash, it will be preserved in the slugified string.

For example, using slugify on an input field would allow for validation while not preventing the user from writing a slug.

import slugify from '@sindresorhus/slugify';

slugify('foo-bar-');
//=> 'foo-bar'

slugify('foo-bar-', {preserveTrailingDash: true});
//=> 'foo-bar-'

Type: string[]
Default: []

Preserve certain characters.

It cannot contain the separator.

For example, if you want to slugify URLs, but preserve the HTML fragment # character.

import slugify from '@sindresorhus/slugify';

slugify('foo_bar#baz', {preserveCharacters: ['#']});
//=> 'foo-bar#baz'

Returns a new instance of slugify(string, options?) with a counter to handle multiple occurrences of the same string.

import {slugifyWithCounter} from '@sindresorhus/slugify';

const slugify = slugifyWithCounter();

slugify('foo bar');
//=> 'foo-bar'

slugify('foo bar');
//=> 'foo-bar-2'

slugify.reset();

slugify('foo bar');
//=> 'foo-bar'

If, for example, you have a document with multiple sections where each subsection has an example.

## Section 1

### Example

## Section 2

### Example

You can then use slugifyWithCounter() to generate unique HTML id's to ensure anchors will link to the right headline.

Reset the counter

import {slugifyWithCounter} from '@sindresorhus/slugify';

const slugify = slugifyWithCounter();

slugify('foo bar');
//=> 'foo-bar'

slugify('foo bar');
//=> 'foo-bar-2'

slugify.reset();

slugify('foo bar');
//=> 'foo-bar'

• slugify-cli - CLI for this module
• transliterate - Convert Unicode characters to Latin characters using transliteration
• filenamify - Convert a string to a valid safe filename

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