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.

Source code based on blakeembrey/change-case with TypeScript.

Usage

import { camelCase } from "https://deno.land/x/case/mod.ts";
camelCase("test string");
// => 'testString'

or

import camelCase from "https://deno.land/x/case/camelCase.ts";
camelCase("test string");
// => 'testString'

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

• camel
• constant
• dot
• header
• lower
• lowerFirst
• normal- aliases: [no, clear]
• param - aliases: [kebab, hyphen]
• pascal
• path
• sentence
• snake
• swap
• title
• upper
• upperFirst

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

camelCase

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

camelCase("test string");
//=> "testString"

constantCase

Return as an upper case, underscore separated string.

constantCase("test string");
//=> "TEST_STRING"

dotCase

Return as a lower case, period separated string.

dotCase("test string");
//=> "test.string"

headerCase

Return as a title cased, dash separated string.

headerCase("test string");
//=> "Test-String"

lowerCase

Return the string in lower case.

lowerCase("TEST STRING");
//=> "test string"

lowerFirstCase

Return the string with the first character lower cased.

lowerFirstCase("TEST");
//=> "tEST"

normalCase

• no
• clear

Return the string without any casing (lower case, space separated).

normalCase("test string");
//=> "test string"

paramCase

Aliases

• kebabCase
• hyphenCase

Return as a lower case, dash separated string.

paramCase("test string");
//=> "test-string"

pascalCase

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

pascalCase("test string");
//=> "TestString"

pathCase

Return as a lower case, slash separated string.

pathCase("test string");
//=> "test/string"

sentenceCase

Return as a lower case, space separated string with the first letter upper case.

sentenceCase("testString");
//=> "Test string"

snakeCase

Return as a lower case, underscore separated string.

snakeCase("test string");
//=> "test_string"

swapCase

Return as a string with every character case reversed.

swapCase("Test String");
//=> "tEST sTRING"

titleCase

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

titleCase("a simple test");
//=> "A Simple Test"

upperCase

Return the string in upper case.

upperCase("test string");
//=> "TEST STRING"

upperFirstCase

Return the string with the first character upper cased.

upperFirstCase("test");
//=> "Test"

Credits

• justjavac

License

deno-change-case is released under the MIT License. See the bundled LICENSE file for details.