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.

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JavaScript

Babel is required to process package imports. If you need a different preprocessor remove all packages first.

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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Behavior

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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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HTML

              
                <div class="width">This div element has width: 960px;</div>
<br />

<div class="max-width">This div element has max-width: 960px;</div>
<br />

<strong>Note:</strong> Drag the browser window to smaller than 960px wide, to see the difference between the two divs!
              
            
!

CSS

              
                /**
 * The problem with this one occurs
 * when the browser window is smaller than 960px.
 * The browser then adds a horizontal scrollbar to the page.
 */
.width {
    width: 960px;
    margin-left: auto;
    margin-right: auto;
    border: 3px solid #73AD21;
}

/**
 * Using max-width instead, in this situation,
 * will improve the browser's handling of small windows.
 * This is important when making a site usable on small devices.
 */
.max-width {
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
    border: 3px solid #73AD21;
}

/**
 * Credits for the tip: W3Schools
 * https://www.w3schools.com/css/css_max-width.asp
 */
              
            
!

JS

              
                
              
            
!
999px

Console