camelCase convert to-kebab-case (or to_snake_case) -- camelToKebab(string, toSnakeNotKebab) -- also will recognize automatically when to call REVERSE function

camelToKebab.js

// camelToKebab.js (string, toSnakeNotKebab) -- also will recognize automatically when to call REVERSE function



// 207 characters	var camelToKebab=(a,b,c=/[_-]/.test(a))=>a&&a.link?a.replace(/\s/g,"").replace(/[A-Z_-]/g,c?" ":a=>" "+a).replace(/^\s+|\s+$/g,"").toLowerCase().replace(/ ([a-z]*)/g,c?a=>a.charAt(1).toUpperCase()+a.slice(2):b?"_$1":"-$1"):a

// /*	// (to run JSCRIPT-compatible version, comment out arrow function) 
var camelToKebab = (string, toSnakeNotKebab,
	_reverse = /[_-]/.test(string)
) => (

	string && string.link

	? string.replace(/\s/g, "").replace(
		/[A-Z_-]/g,

		_reverse 

		? " "

		: ( s =>
			" " + s
		)

	).replace(/^\s+|\s+$/g, "")

	.toLowerCase()

	.replace(
		/ ([a-z]*)/g,

		_reverse

		? ( s =>
			s.charAt(1).toUpperCase() + s.slice(2)
		)

		: toSnakeNotKebab ? "_$1"

		: "-$1"
	)

	: string

);
// */	// (to run JSCRIPT-compatible version, comment out arrow function)



// non-arrow version (so it works in CSCRIPT.EXE /nologo JScript.js)... to run, => arrow version above must be commented out

// 257 characters	var camelToKebab=function(a,b,c){return c=/[_-]/.test(a),a&&a.link?a.replace(/\s/g,"").replace(/[A-Z_-]/g,c?" ":function(a){return" "+a}).replace(/^\s+|\s+$/g,"").toLowerCase().replace(/ ([a-z]*)/g,c?function(a){return a.charAt(1).toUpperCase()+a.slice(2)}:b?"_$1":"-$1"):a}

var camelToKebab_JSCRIPT = function(string, toSnakeNotKebab,
	_reverse
) {	return (

	_reverse = /[_-]/.test(string),

	string && string.link

	? string.replace(/\s/g, "").replace(
		/[A-Z_-]/g,

		_reverse

		? " "

		: function(s) { return (
			" " + s
		); }

	).replace(/^\s+|\s+$/g, "")

	.toLowerCase()

	.replace(
		/ ([a-z]*)/g,

		_reverse

		? function(s) { return (
			s.charAt(1).toUpperCase() + s.slice(2)
		); }

		: toSnakeNotKebab ? "_$1"

		: "-$1"
	)

	: string

); };



/*@cc_on
@if(@_jscript)
camelToKebab = camelToKebab_JSCRIPT;
console={log:function(){var a=arguments;a.length&&WScript.Echo([].join.call(a," "))}};
console.clear=function(){console.log(Array(29).join("\n"))};
@end@*/



console.clear();

var EMPTY_OBJECT = {};
var EMPTY_ARRAY = [];

console.log(
	camelToKebab() === undefined,
	camelToKebab(null) === null,
	camelToKebab(EMPTY_OBJECT) === EMPTY_OBJECT,
	camelToKebab(EMPTY_ARRAY) === EMPTY_ARRAY,

	camelToKebab(0) === 0,
	camelToKebab(1) === 1,
	camelToKebab("") === "",
	camelToKebab("  a  b  ") === "ab",
	camelToKebab("  1  2  ") === "12"
);

console.log(
	camelToKebab("-  - _ _--from--__--kebab--__--case--__--") === "fromKebabCase",	// _to: 'camel' = "fromKebabCase"
	camelToKebab("_ _ - -__from__--__snake__--__case__--__") === "fromSnakeCase",	// _to: 'camel' = "fromSnakeCase"
	camelToKebab("  FromPascalCase  ") === "from-pascal-case",	// _to: 'kebab' = "from-pascal-case"
	camelToKebab("  elseFromCamelCase  ") === "else-from-camel-case"	// _to: 'kebab' = "else-from-camel-case"
);

console.log(
	camelToKebab("  PascalToKebab", true) === "pascal_to_kebab",	// _to: 'snake' = "pascal_to_kebab"
	camelToKebab("  elseCamelToKebab", true) === "else_camel_to_kebab",	// _to: 'snake' = "else_camel_to_kebab"
	camelToKebab("-  - _ _--kebab--__--to--__--camel--__--", true) === "kebabToCamel",	// _to: 'camel' = "kebabToCamel"
	camelToKebab("_  _ - -__snake__--__to__--__camel__--__", true) === "snakeToCamel"	// _to: 'camel' = "snakeToCamel"
);

console.log(
	camelToKebab([,][0], true) === undefined,
	camelToKebab(null, true) === null,
	camelToKebab(EMPTY_OBJECT, true) === EMPTY_OBJECT,
	camelToKebab(EMPTY_ARRAY, true) === EMPTY_ARRAY,

	camelToKebab(0, true) === 0,
	camelToKebab(1, true) === 1,
	camelToKebab("", true) === "",
	camelToKebab("  a  b  ", true) === "ab",
	camelToKebab("  1  2  ", true) === "12"
);

"DONE";