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HTML

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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.

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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 

              
                <div id="parent">
<table>
  <tr><th>City</th><th>Country</th><th>Note</th></tr>
  <tr><td>台北</td><td>台湾</td><td>活気にあふれた台湾最大の都市で経済政治文化の中心地で日本人となじみが深い</td></tr>
  <tr><td>バンコク</td><td>タイ</td><td>華やかな大都会の賑わいと、厳かな仏教文化が息づき、古今の歴史と文化が見事に調和した街並み</td></tr>
  <tr><td>VANCOUVER</td><td>Canada</td><td>BeautyfulVancounverCityIsSecondCapitalOfCanada</td></tr>
  <tr><td></td><td></td><td>↑WordBreakを設定すると英文も折り返す↑</td></tr>
</table>
</div>
!

CSS 

              
                
td,th{
  border: 1px solid black;
  /*英文を途中で折り返す*/
  word-break: break-all;
}
body{
  border: 3px solid black;
  animation: slide 6s ease-in-out forwards alternate infinite ;
}
@keyframes slide {
  0%,15% {
    width:98%;
  }
  85%,100% {
    width: 200px;
  }
}
!

JS
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999px

Console