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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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Packages

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Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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HTML 

              
                <!DOCTYPE html>
<html lang="ja">
<head>
    <meta charset="utf-8">
    <title>初めての入力フォーム</title>
</head>
<body>
    <form method="get" action="form.html">
        <div>
		<label for="shimei">氏名</label>
        	<input type="text" name="shimei" placeholder="例：鈴木一郎">
	</div>
	<div>
        	<label for="pass">パスワード</label>
        	<input type="password" maxlength="8" name="pass" placeholder="例：pass1234">
	</div>
	<div>
		<label for="tel">電話番号</label>
		<input type="tel" name="tel" palceholder="090XXXXXXXX">
	</div>
	<div>
		<label for="sei">性別</label>
        	<input type="radio" name="sei" value="男" checked="checked">:男
        	<input type="radio" name="sei" value="女">：女
	</div>
	<div>
        	<label for="course">希望コース</label>
        	<input type="checkbox" name="course" value="html">html
        	<input type="checkbox" name="course" value="css">css
        	<input type="checkbox" name="course" value="javascript">javascript
	</div>
	<div>
        	<label for="old">年齢</label>        	
        	<select name="old">
            		<option value="20">20代</option>
            		<option value="30">30代</option>
            		<option value="40">40代</option>
            		<option value="50">50代</option>
        	</select>
	</div>
	<div>
        	<label for="free">自由記述欄</label> 
        	<textarea name="free" rows="1" cols="40" placeholder="自由に意見を記述してください"></textarea>
	</div>
    </form>
</body>
</html>
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CSS
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JS
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999px

Console