check email id valid or not without using regex in javascript

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Corinne
05 Jan 2017
1function validateEmail (emailAdress)
2{
3  let regexEmail = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
4  if (emailAdress.match(regexEmail)) {
5    return true; 
6  } else {
7    return false; 
8  }
9}
10
11let emailAdress = "test@gmail.com";
12console.log(validateEmail(emailAdress));
13
Mara
12 Aug 2020
1function validateEmail(email) {
2    const re = /^(([^<>()[\]\\.,;:\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,}))$/;
3    return re.test(String(email).toLowerCase());
4}
5
David
15 May 2018
1function ValidateEmailAddress(emailString) {
2    // check for @ sign
3    var atSymbol = emailString.indexOf("@");
4    if(atSymbol < 1) return false;
5    
6    var dot = emailString.indexOf(".");
7    if(dot <= atSymbol + 2) return false;
8    
9    // check that the dot is not at the end
10    if (dot === emailString.length - 1) return false;
11    
12    return true;
13}
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