Form input selector (:input)

In this chapter you will learn:

Description and Syntax for form input tag selector
Examples for form input element selector
Select input element by attribute name

Description and Syntax

$(":input")

selects all form elements (<input> (all types), <select>, <textarea>, <button>)

Examples

The following code uses the form input selector to get the count of input elements in a form.

<html><!--from ja  va 2  s. co m-->
  <head>
    <script src="http://java2s.com/style/jquery-1.8.0.min.js"></script>
    <script type="text/javascript">
        $(document).ready(function(){
            alert($(":input").length);
        });
    </script>
  </head>
  <body>
    <body>
        <input type="button" value="Input Button"/>
    
        <input type="checkbox">j ava 2s.com</input>
        <input type="checkbox" />
        <input type="checkbox" />
        <input type="file" />
        <input type="hidden" />
        <input type="image" />
        <input type="password" />
        <input type="radio" />
        <input type="reset" />
        <input type="submit" />
        <input type="text" />
    
        <select><option>Option<option/></select>
        <textarea></textarea>
        <button>Button</button>
    </body>
</html>

Click to view the demo

Select input element by attribute name

The following code selects all inputs that don't have the name 'n'.

<html><!--   ja v  a2  s. c o  m-->
  <head>
    <script src="http://java2s.com/style/jquery-1.8.0.min.js"></script>
    <script type="text/javascript">
        $(document).ready(function(){
            $("input[name!='n']").val(" not n");
        });
    </script>

  </head>
  <body>
    <body>
      <input type="text" name="newsletter" value="Hot Fuzz" />
    </body>
</html>

Click to view the demo

The following code select input element by name attribute.

<html>//j a v a 2 s.c  om
  <head>
    <script src="http://java2s.com/style/jquery-1.8.0.min.js"></script>
    <script type="text/javascript">
        $(document).ready(function(){
            $("input[name='ab']").val("ab");
        });
    </script>
  </head>
  <body>
    <body>
      <input name="ab" />
    </body>
</html>