phone number validation in jQuery-javascript?

Hello, there are several ways to validate your textbox for phone numbers:

• Using jQuery plugins like
  -> jQuery Validate PhoneUS Method
  
  

  $( "#myform" ).validate({
    rules: {
      phone-number: {
        required: true,
        phoneUS: true
      }
    }
  });

  For using above Validation method, you need to add this script reference with jQuery validate "https://cdn.jsdelivr.net/jquery.validation/1.16.0/additional-methods.min.js"

•  Using Custom JS Method
  

  function validatePhone(txtPhone) {
      var a = document.getElementById(txtPhone).value;
      var filter = /^((\+[1-9]{1,4}[ \-]*)|(\([0-9]{2,3}\)[ \-]*)|([0-9]{2,4})[ \-]*)*?[0-9]{3,4}?[ \-]*[0-9]{3,4}?$/;
      if (filter.test(a)) {
          return true;
      }
      else {
          return false;
      }
  }

  
  
  
• Using method to allow only numbers like
  

  //it will only allow numeric keys
   $(".AllowNumeric").on("keypress keyup blur",function (event) {    
             $(this).val($(this).val().replace(/[^\d].+/, ""));
              if ((event.which < 48 || event.which > 57)) {
                  event.preventDefault();
              }
          });
  

• UK Phone number validation script

        var reg =  /^((\+44\s?|0)7([45789]\d{2}|624)\s?\d{3}\s?\d{3})$/ ; //UK phone regex 
        function PhoneValidation(phoneNumber)
        {  
         
          var OK = reg.exec(phoneNumber);  
          if (!OK)  
            window.alert("phone number isn't  valid");  
          else  
            window.alert("phone number is  valid");  
        }  
  

  
  Fiddle: https://jsfiddle.net/85n1yato/ (Try checking sample number: +447440965338)

Regex Phone number validation for US phone Number

      var reg = /\(?([0-9]{3})\)?([ .-]?)([0-9]{3})\2([0-9]{4})/; //US regex
      function PhoneValidation(phoneNumber)
      {  
      
        var OK = reg.exec(phoneNumber);  
        if (!OK)  
          window.alert("phone number isn't  valid");  
        else  
          window.alert("phone number is  valid");  
      }  

Sample fiddle: https://jsfiddle.net/87hfg201/

Regex to validate phone number

^(?:(?:\(?(?:00|\+)([1-4]\d\d|[1-9]\d+)\)?)[\-\.\ \\\/]?)?((?:\(?\d{1,}\)?[\-\.\ \\\/]?)+)(?:[\-\.\ \\\/]?(?:#|ext\.?|extension|x)[\-\.\ \\\/]?(\d+))?$

You can test output here

https://regex101.com/r/Enu3rz/1

OR

You can also use https://github.com/google/libphonenumber library which can be used with Javascript, C#, Java etc.