Answers for "camel case using javascript"

js camel case to snake case

var s1 = 'someTextHere';
var o1 = s1.split(/(?=[A-Z])/).join('_').toLowerCase();

javascript to camelcase

String.prototype.toCamelCase = function () {
	let STR = this.toLowerCase()
		.trim()
		.split(/[ -_]/g)
		.map(word => word.replace(word[0], word[0].toString().toUpperCase()))
		.join('');
	return STR.replace(STR[0], STR[0].toLowerCase());
};