How to restrict special characters in textbox using jquery?

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I have filed with Name and that should be accept some characters only.

What I have tried:

I Have tried with the below code

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
$(document).ready(function(){

  $("button").click(function(){
  
  var txtvalue=$("#firstname").val();
 
  if(isValid(txtvalue)){
            alert("Name can have only specific chras only.");
        }
        else{ alert("Accepted.");}
  });
    function isValid(str){
      return /[_@.!$%^#&+-{}=^~`,;]/g.test(str);
     
}


});
</script>
</head>
<body>


<button>Click to check special chars</button>
<input type="text" name="Firstname" value="" id="firstname">
</body>
</html>

Posted 13-Mar-19 2:39am

DGKumar

Updated 13-Mar-19 3:12am

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#realJSOP · Answer 1 · 2019-03-13T03:12:00

Solution 1

This will allow A-Z, a-z, and 0-9:

/[^\w]|_/g

Posted 13-Mar-19 3:12am

#realJSOP

Comments

DGKumar 13-Mar-19 9:21am

HI
The textbox should accept these charatcers _@.!$%^#&+-{}=^~`,; and alpha numeric

I have used the below code is ti wrong

$(function(){
$('#t').keypress(function(e){
var txt = String.fromCharCode(e.which);

if(!txt.match(/[A-Z0-9+#@.!$%&-(){}=^~,:';]/))//+#-.
{
alert("invalid");
return false;
}
});
});

#realJSOP 13-Mar-19 10:37am

So in other words, you want to let the user type in anything he wants? That's pretty much every printable character on the keyboard.

DGKumar 14-Mar-19 5:16am

Yes here only restrict * and a-z

#realJSOP 14-Mar-19 7:00am

I still don't know what you want. What characters do you want to allow?