Validation Regex (Pure JS)

validation_regex.js

/**
 * Validation Regex. Default is alphanumeric.
 *
 * @param strvalue = is the text or source to be regex. You can use selector id at here.
 * @param regexvalue = your regex value here but there is alphanumeric, alphabet, numeric, username and email already exist.
 * @param isElementID = if this set to true, then strvalue will read from element ID.
 * @return boolean
 */
function validationRegex(strvalue,regexvalue,isElementID){
	regexvalue=(regexvalue===undefined)?"alphanumeric":regexvalue;
	isElementID=(isElementID===undefined)?false:isElementID;
	switch (regexvalue) {
		case "required":
			regexvalue = /.*\S.*/
			break;
		case "fullname":
			regexvalue = /^[A-Za-z0-9 .,]+$/
			break;
		case "account-number-bank":
			regexvalue = /^[A-Za-z0-9]+$/
			break;
		case "date":
			regexvalue = /([123456789]\d{3}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01]))/
			break;
		case "timestamp":
			regexvalue = /^\d\d\d\d-(0?[1-9]|1[0-2])-(0?[1-9]|[12][0-9]|3[01]) (00|[0-9]|1[0-9]|2[0-3]):([0-9]|[0-5][0-9]):([0-9]|[0-5][0-9])$/
			break;
		case "alphanumeric":
			regexvalue = /^[a-zA-Z0-9]+$/;
			break;
		case "alphabet":
			regexvalue = /^[a-zA-Z]+$/;
			break;
		case "decimal":
			regexvalue = /^[+-]?[0-9]+(?:\.[0-9]+)?$/;
			break;
		case "notzero":
			regexvalue = /^[1-9][0-9]*$/;
			break;
		case "numeric":
			regexvalue = /^[0-9]+$/;
			break; 
		case "double":
			regexvalue = /^[+-]?[0-9]+(?:,[0-9]+)*(?:\.[0-9]+)?$/;
			break;
		case "username":
			regexvalue = /^[a-zA-Z0-9]{3,20}$/;
			break;
		case "domain":
			regexvalue = /^[a-zA-Z0-9][a-zA-Z0-9-]{1,61}[a-zA-Z0-9](?:\.[a-zA-Z]{2,})+$/;
			break;
		case "url":
			regexvalue = /(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/;
			break;
		case "email":
			regexvalue = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
			break;
		case "email-rfc":
			regexvalue = /^(?=.{1,64}@)[a-z0-9._%+-]+@([a-z0-9-]+\.)+[a-z]{2,}$/;
			break;
		case "email-simple":
			regexvalue = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/;
			break;
		case "strongpassword":
			regexvalue = /^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[!@#\$%\^&\*])(?=.{8,})/
			break;
		case "mediumpassword":
			regexvalue = /^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.{6,})/
			break;
		default:
			regexvalue = regexvalue;
	}
	var rgx = "";
	if (isElementID){
		rgx = document.getElementById(strvalue).value;
	} else {
		rgx = strvalue;
	}
  
	if (regexvalue.test(rgx) == false) {
		return false;
	}
	return true;
}


// Usage with numeric regex
if (validationRegex("1abc2","numeric")){
	console.log("true");
} else {
	console.log("false");
}

// Usage with custom regex
if (validationRegex("1abc2",/^[a-zA-Z0-9]{3,20}$/)){
	console.log("true");
} else {
	console.log("false");
}

// Usage with custom regex from selector id value
<input id="tester" type="text" value="1abc2">
if (validationRegex("tester",/^[a-zA-Z0-9]{3,20}$/,true)){
	console.log("true");
} else {
	console.log("false");
}