HTML

input number maxlength

<form method="post">
      <label for="myNumber">My Number:</label>
      <input type="number" maxlength="9" required
      oninput="javascript: if (this.value.length > this.maxLength) this.value = this.value.slice(0, this.maxLength);" >
     <br><br>
      <input type="submit" value="Submit">
</form>

input number maxlength html

<input name="var"
    oninput="javascript: if (this.value.length > this.maxLength) this.value = this.value.slice(0, this.maxLength);"
    type = "number"
    maxlength = "6"
 />

input type number max value validation

/* comman function for all input by joshi yogesh {joshiyogesh0333@gmail.com} */

$(function () {
   $( "input" ).change(function() {
   var max = parseInt($(this).attr('max'));
   var min = parseInt($(this).attr('min'));
   if ($(this).val() > max)
   {
      $(this).val(max);
   }
   else if ($(this).val() < min)
   {
      $(this).val(min);
   }       
 }); 
});