jQuery Selector - 如何选择所有输入，textarea，选择和按钮元素

我们想知道如何选择所有输入，textarea，选择和按钮元素。


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<html>
  <head>
    <script type="text/javascript" src='http://code.jquery.com/jquery-1.5.2.js'></script>
    <script type="text/javascript">
        $(document).ready(function(){
            console.log($(":input").length);
        });
    </script>
  </head>
  <body>
        <input type="button" value="Input Button"/>
    
        <input type="checkbox">asdf</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>
 
 
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jQuery Selector - 如何选择所有输入，textarea，选择和按钮元素