test valid

by dtnguyen_1608

HTML

<script src="https://code.jquery.com/jquery-3.2.1.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<input type="text" id="" class="width-100 birdthday-Validate" value="">

CSS

input {
  width: 100%;
  height: 40px;
}

JavaScript

$('.birdthday-Validate').keyup(function(e) {
  var acb = this.value;
  console.log("acb " + acb)
  if (acb.charAt(0) == '+') {
    for (var i = 1; i < acb.length; i++) {
      var c = acb.charAt(i);
      //if(c == '+'){
      //var acb1 = acb;
      //console.log("acb1 after : " + acb1);
      //console.log("At(i) : " + acb.charAt(i));
      //acb = acb1.replace(acb.charAt(i), "]");
      //console.log("acb after : " + acb);
      //c = acb.charAt(i);
      //}
      if (c < '0' || c > '9') {
        console.log('day khong phai la so');
        return $(this).val(acb.split(c)[0]);
      }
    }
    console.log('day hop le');
    return $(this).val(acb);
  } else {
    console.log('day khong co dau +');
    return $(this).val("");
  }
});