Change Case
Transform a string between
camelCase,PascalCase,Capital Case,snake_case,param-case,CONSTANT_CASEand others.
Installation
npm install change-case --save
Usage
import * as changeCase from "change-case";Core
These functions come bundled with change-case:
camelCasecapitalCaseconstantCasedotCaseheaderCasenoCaseparamCasepascalCasepathCasesentenceCasesnakeCase
All core methods accept options as the second argument.
camelCase
Transform into a string with the separator denoted by the next word capitalized.
camelCase("test string");
//=> "testString"capitalCase
Transform into a space separated string with each word capitalized.
capitalCase("test string");
//=> "Test String"constantCase
Transform into upper case string with an underscore between words.
constantCase("test string");
//=> "TEST_STRING"dotCase
Transform into a lower case string with a period between words.
dotCase("test string");
//=> "test.string"headerCase
Transform into a dash separated string of capitalized words.
headerCase("test string");
//=> "Test-String"noCase
Transform into a lower cased string with spaces between words.
noCase("testString");
//=> "test string"paramCase
Transform into a lower cased string with dashes between words.
paramCase("test string");
//=> "test-string"pascalCase
Transform into a string of capitalized words without separators.
pascalCase("test string");
//=> "TestString"pathCase
Transform into a lower case string with slashes between words.
pathCase("test string");
//=> "test/string"sentenceCase
Transform into a lower case with spaces between words, then capitalize the string.
sentenceCase("testString");
//=> "Test string"snakeCase
Transform into a lower case string with underscores between words.
snakeCase("test string");
//=> "test_string"Other Case Utilities
titleCaseswapCaseisLowerCaseisUpperCaselowerCaselowerCaseFirstupperCaseupperCaseFirstspongeCase
These functions are not "case" libraries but independent functions, you must install these separately.
titleCase
Transform a string into title case following English rules.
titleCase("a simple test");
//=> "A Simple Test"swapCase
Transform a string by swapping every character from upper to lower case, or lower to upper case.
swapCase("Test String");
//=> "tEST sTRING"isLowerCase
Returns
trueif the string is lower case only.
isLowerCase("test string");
//=> trueisUpperCase
Returns
trueif the string is upper case only.
isUpperCase("test string");
//=> falselowerCase
Transforms the string to lower case.
lowerCase("TEST STRING");
//=> "test string"lowerCaseFirst
Transforms the string with the first character in lower cased.
lowerCaseFirst("TEST");
//=> "tEST"upperCase
Transforms the string to upper case.
upperCase("test string");
//=> "TEST STRING"upperCaseFirst
Transforms the string with the first character in upper cased.
upperCaseFirst("test");
//=> "Test"spongeCase
Transform into a string with random capitalization applied.
spongeCase("Test String");
//=> "tEst stRINg"Options
splitRegexpRegExp used to split into word segments (see example).stripRegexpRegExp used to remove extraneous characters (default:/[^A-Z0-9]/gi).delimiterValue used between words (e.g." ").transformUsed to transform each word segment (e.g.lowerCase).
Split Example
If you find the default split hard to use, you can provide a different one. The example below will change the behavior to word2019 -> word 2019 and minifyURLs -> minify urls:
const options = {
splitRegexp: /([a-z])([A-Z0-9])/g,
};Related
License
MIT