Set default values for input tags using jQuery

  • 2021-06-29 09:48:45
  • OfStack

Due to project requirements, a simple input default setting was written to implement the method of setting default values to all inputs in.form.


<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>input Default Value Settings </title>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/1.6.2/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
  // Collective Call 
  $(".form input").each(function(){
    $(this).setDefauleValue();
  });
  // Single Call 
  $("#key").setDefauleValue();
})
 
// Set up input,textarea Default value 
$.fn.setDefauleValue = function() {
  var defauleValue = $(this).val();
  $(this).val(defauleValue).css("color","#999");
 
  return this.each(function() {   
    $(this).focus(function() {
      if ($(this).val() == defauleValue) {
        $(this).val("").css("color","#000");// Color of input value 
      }
    }).blur(function() {
      if ($(this).val() == "") {
        $(this).val(defauleValue).css("color","#999");// Default value color 
      }
    });
  });
}
</script>
</head>
 
<body>
<form class="form">
 <input type="text" size="30" value=" Enter a nickname ">
 <br>
 <input type="text" size="30" value=" Enter Name ">
</form>
<br>
<br>
<br>
<input type="text" size="30" id="key" value=" Input Student ID , name, nickname ">
</body>
</html>

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