Pen Settings

HTML

CSS

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.

+ add another resource

JavaScript

Babel includes JSX processing.

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.

+ add another resource

Packages

Add Packages

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.

Behavior

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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.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

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Visit your global Editor Settings.

HTML

              
                html5
  // 外部容器
  div#container 
    // 瀑布流容器
    ul#waterfall 
     - for(let i=0;i<12;i++ )
      // 内部项目
      li.item 
        //  生成随机高度
        - let height = Math.ceil(Math.random() *(150+1-500)+500) 
          // 模拟不同高度图片
          div(class='img',style='height:'+height+'px')
          //  模拟介绍文本
          p Lorem ipsum dolor sit amet consectetur adipisicing elit. Necessitatibus culpa cupiditate a aperiam libero aspernatur unde 
              
            
!

CSS

              
                //reset
* 
 padding 0
 margin 0
// 外部容器
#container
  width 1200px
  margin 30px auto
  // 瀑布流容器
  #waterfall 
    column-count 3
    list-style-type none
    // 内部项目
    .item
      padding 10px
      margin 0 10px 20px
      break-inside avoid
      border: 2px solid #000
      div.img
        background red
              
            
!

JS

              
                
              
            
!
999px

Console