cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

Pen Settings

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

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Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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Code Indentation


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Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

              <form method="post">
    <select class="user">
        <optgroup label="admin">
            <option value="1">Blue</option>
            <option value="2">David</option>
        <optgroup label="guest">
            <option value="1">Judy</option>
            <option value="2">Kate</option>
            <option value="2">John</option>
              $(function (){
        language: 'zh-TW',
        width: '100%',
        // 最多字元限制
        maximumInputLength: 10,
        // 最少字元才觸發尋找, 0 不指定
        minimumInputLength: 0,
        // 當找不到可以使用輸入的文字
        tags: true,
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