change-case

What is change-case?

The change-case package is a utility library that provides various functions to transform strings between different cases, such as camel case, snake case, kebab case, and more. It is useful for formatting strings in different coding conventions or textual formats.

What are change-case's main functionalities?

camelCase

Converts a string to camel case.

const { camelCase } = require('change-case');
console.log(camelCase('test string')); // 'testString'

snakeCase

Converts a string to snake case.

const { snakeCase } = require('change-case');
console.log(snakeCase('test string')); // 'test_string'

kebabCase

Converts a string to kebab case.

const { kebabCase } = require('change-case');
console.log(kebabCase('test string')); // 'test-string'

titleCase

Converts a string to title case.

const { titleCase } = require('change-case');
console.log(titleCase('test string')); // 'Test String'

constantCase

Converts a string to constant case.

const { constantCase } = require('change-case');
console.log(constantCase('test string')); // 'TEST_STRING'

Other packages similar to change-case

lodash

Lodash is a comprehensive utility library that includes methods for string case transformation, such as _.camelCase, _.snakeCase, and _.kebabCase. It offers a wider range of utilities beyond string case conversion, making it more versatile but also larger in size compared to change-case.

case

The 'case' package is another string case conversion library that supports various case transformations. It is similar to change-case but has a different API and may have different case conversion implementations.

string-case

String-case is a library that provides case conversion functions similar to change-case. It may offer a different set of features or API design, which could be preferred by some developers over change-case.

README

Change Case

Convert strings between camelCase, PascalCase, Title Case, snake_case, lowercase, UPPERCASE, CONSTANT_CASE and more.

All methods support Unicode (non-ASCII characters) and non-string entities, such as objects with a toString property, numbers and booleans. Empty values (null and undefined) will result in an empty string.

Every method is also available on npm as an individual package.

Installation

npm install change-case --save

Usage

var changeCase = require('change-case')
//=> { isUpperCase: [Function], camelCase: [Function], ... }

Available methods (short-hand shown below, long-hand available in examples):

• isUpper
• isLower
• upper
• ucFirst
• lcFirst
• lower
• sentence
• title
• camel
• pascal
• snake
• param
• dot
• path
• constant
• swap

All methods accept two arguments, the string to change case and an optional locale.

isUpperCase

Return a boolean indicating whether the string is upper cased.

changeCase.isUpperCase('test string')
//=> false

isLowerCase

Return a boolean indicating whether the string is lower cased.

changeCase.isLowerCase('test string')
//=> true

upperCase

Return the string in upper case.

changeCase.upperCase('test string')
//=> "TEST STRING"

upperCaseFirst

Return the string with the first character upper cased.

changeCase.upperCaseFirst('test')
//=> "Test"

lowerCaseFirst

Return the string with the first character lower cased.

changeCase.lowerCaseFirst('TEST')
//=> "tEST"

lowerCase

Return the string in lower case.

changeCase.lowerCase('TEST STRING')
//=> "test string"

sentenceCase

Return as a lower case, space separated string.

changeCase.sentenceCase('testString')
//=> "test string"

titleCase

Return as a space separated string with the first character of every word upper cased.

changeCase.titleCase('a simple test')
//=> "A Simple Test"

camelCase

Return as a string with the separators denoted by having the next letter capitalized.

changeCase.camelCase('test string')
//=> "testString"

pascalCase

Return as a string denoted in the same fashion as camelCase, but with the first letter also capitalized.

changeCase.pascalCase('test string')
//=> "TestString"

snakeCase

Return as a lower case, underscore separated string.

changeCase.snakeCase('test string')
//=> "test_string"

paramCase

Return as a lower case, dash separated string.

changeCase.paramCase('test string')
//=> "test-string"

dotCase

Return as a lower case, period separated string.

changeCase.dotCase('test string')
//=> "test.string"

pathCase

Return as a lower case, slash separated string.

changeCase.pathCase('test string')
//=> "test/string"

constantCase

Return as an upper case, underscore separated string.

changeCase.constantCase('test string')
//=> "TEST_STRING"

swapCase

Return as a string with every character case reversed.

changeCase.swapCase('Test String')
//=> "tEST sTRING"

Typings

Includes a TypeScript definition.

Related

• Meteor
• Atom
• VSCode

License

MIT