Email validation in JavaScript on button click – How to Perform Email Validation in JavaScript?

Email validation in JavaScript on button click – simple email validation in javascript is used to validate email IDs provided by the users. Also The email address must start with any character. Javascript(JS) Email Validation without Regex and with Regex Examples.

Email validation in JavaScript on button click

The domain name contains are Letters, Digits, Dots and Hyphens. Email Validation in JavaScript – Step by Step Example with source code.

JavaScript is use to check the entered email address is valid or not before store E-Mail address into a server.

email validation in javascript Example

javascript regex email

function checkvalidateEmailAddress (emailAdress)
{
  let regexEmail = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
  if (emailAdress.match(regexEmail)) {
    return true; 
  } else {
    return false; 
  }
}

let emailAdress = "[email protected]";
console.log(checkvalidateEmailAddress(emailAdress));

email regex javscript

Example

function checkvalidateEmailAddress(emailAdress) {
    var re = /^(([^<>()\[\]\\.,;:\[email protected]"]+(\.[^<>()\[\]\\.,;:\[email protected]"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    return re.test(String(emailAdress).toLowerCase());
}

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email regex javascript

Example

checkvalidateEmailAddress("[email protected]"); // Must be a string

function checkvalidateEmailAddress(emailAdress) {
	var emailformat = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(String(emailAdress).toLowerCase());
	if (emailAdress.match(emailformat)) {
    	alert("Nice Email!")
      	return true;
    };
    alert("That's not an emailAdress?!")
    return (false);
};

email regex javascript

Example
JavaScript: validating email address

checkvalidateEmailAddress("[email protected]"); // true

function checkvalidateEmailAddress(emailAdress) {
	var emailRegex = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
	return !!emailAdress && typeof emailAdress === 'string'
		&& emailAdress.match(emailformat)};
};

js check if email is valid

Example

function checkvalidateEmailAddress(mail) 
{
 if (/^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-][email protected][a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/.test(myForm.emailAddr.value))
  {
    return (true)
  }
    alert("You have entered an invalid email address!")
    return (false)
}

Email validation using javascript

Example
Call the function on Email textbox

function checkvalidateEmailAddress() {

    var emailAdress = document.getElementById('txtEmail');
    var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;

    if (!filter.test(emailAdress.value)) {
    alert('Please provide a valid or real email address');
    emailAdress.focus;
    return false;
 }
}

I hope you get an idea about Email validation in JavaScript on button click.
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