javascript - How prevent user to enter Zero as first digit in html input box using jquery Validation plug-in, -

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i working on validation of html form using j query validate plugin, want restrict things user cannot enter 0 first digit.

for example: have text box enter amount item user can not enter 0 amount.

you can perform custom validation adding own validator using addmethod

as want restrict user entering 0 first digit in text field, can achieved using regular expression ^[^0]\d*.

here snippet.

$.validator.addmethod("pattern", function(value, element, regexpr) {    return regexpr.test(value);  }, "please enter valid value.");    $("form").validate({    rules: {      cost: {        required: true,        //change regexp suit needs        pattern: /^[^0]\d*$/g      }    }  });
.form-group label.error {    color: maroon;  }
<!doctype html>  <html>    <head>    <meta charset="utf-8">    <meta name="viewport" content="width=device-width">      <script src="https://code.jquery.com/jquery-3.1.0.js"></script>    <script src="https://jqueryvalidation.org/files/dist/jquery.validate.js"></script>      <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" type="text/css" />    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>      <title>js bin</title>  </head>    <body>    <form class="form-inline">      <div class="form-group">        <label for="cost">cost:</span>          <input class="form-control" id="cost" type="number" name="cost">      </div>      <button type="submit" class="btn btn-default">submit</button>    </form>  </body>    </html>


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