Regular Expressions for Form Data Validation in JS (Common)

Common verification methods:

checkUserNameflag=false; 
 checkPasswordflag=false; 
 checkPasswordAgianflag=false; 
 checkEmailflag=false; 
// Username Verification 
function checkUserName() { 
 var username = $("userNeme").value; 
 var zz = /^[A-Za-z0-9]{6,}$/; 
 if (!zz.test(username)) { 
  $("userName_warn").innerHTML = " × Username does not meet the specifications"; 
  checkUserNameflag=false; 
 } else { 
  /*$("userName_warn").style.color='blue'; 
  $("userName_warn").innerHTML = "√ Username available";*/ 
  showUserExist(username); 
  checkUserNameflag=true; 
 } 
} 
//Reset Prompt 
function resetWarn() { 
 $("userName_warn").innerHTML=""; 
 $("email_warn").innerHTML=""; 
 $("password_warn").innerHTML=""; 
 $("Repassword_warn").innerHTML=""; 
} 
// Password verification 
function checkPassword() { 
 var password1 = $("password").value; 
 if (password1.length >= 6 && password1.length <= 15) { 
  checkPasswordflag = true; 
  $("password_warn").style.color='blue'; 
  $("password_warn").innerHTML = " √ Password is available "; 
  checkAgianMiMa(); 
 } else { 
  checkPasswordflag = false; 
  $("password_warn").innerHTML = " × Password must be at least 6 characters "; 
 } 
} 
function checkPasswordAgian() { 
 var password1 = $("password").value; 
 var password2 = $("rePassword").value; 
 if (password1 == password2) { 
  if (password1 == "") { 
   $("Repassword_warn").innerHTML = " × Please enter a password "; 
   checkPasswordAgianflag = false; 
   return; 
  } 
  $("Repassword_warn").style.color='blue'; 
  $("Repassword_warn").innerHTML = "√ Repeated password entered correctly"; 
  checkPasswordAgianflag = true; 
 } else { 
  checkPasswordAgianflag = false; 
  $("Repassword_warn").innerHTML = " × Passwords entered twice are different "; 
 } 
} 
function checkEmail(){ 
 //Verification of email address 
  var myreg = /^([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$/; 
  var email=$("email").value; 
  if(!myreg.test(email)){ 
   checkEmailflag=false; 
    $("email_warn").style.color='red';}} 
   $("email_warn").innerHTML = " × Email format does not meet the specifications"; 
  } else { 
   checkEmailflag=true; 
   $("email_warn").style.color='blue'; 
   $("email_warn").innerHTML = "√ Email format is correct"; 
  } 
} 
function submitCheck(){ 
 alert(checkUserNameflag); 
 if(checkUserNameflag==false || checkPasswordflag==false || checkPasswordflag==false 
   ||checkPasswordAgianflag==false || checkEmailflag==false){ 
  return; 
 } 
} 
function $(id){ 
 return document.getElementById(id); 
} 

js regular expression--Form verification

Mobile phone number detection：/0?(13|14|15|18)[0-9]{9}/

Username detection: (numbers, English letters, Chinese characters, underscores, hyphens):/^[A-Za-z0-9_\-\u4e00-\u9fa5]+$/

Password: (numbers, English letters, underscores, hyphens)/^[A-Za-z0-9_-]+$/

ID card：/\d{17}[\d|x]|\d{15}/

Non-empty：/^\S+$/

IP Address：/((?:(?:25[0-5]|2[0-4]\d|[01]?\d?\d)\.){3}{?:25[0-5]|2[0-4]\d|[01]?\d?\d)/

The regular expressions for JavaScript form data validation mentioned above are introduced by the editor for everyone's reference. I hope it will be helpful to everyone. If you have any questions, please leave a message, and the editor will reply to everyone in time. At the same time, I would also like to express my sincere gratitude to everyone for their support of the Yanaohua tutorial website!