Can you explain the purpose of using the "overlay" value in the "overflow" property?

Can someone please clarify the distinction between "overlay" and "auto" for me? Is the function of "overlay" similar to that of "auto"?

Answer №1

One key distinction lies in the fact that overflow: overlay is specifically supported by -Webkit browsers, lacks standardization, and enables content to stretch beyond the scrollbar - while overflow: auto prevents content from extending below the scrollbar; if it does, it will adjust the layout by either shifting vertically or horizontally.

p {
    display: inline-block;
    width: 12em;
    height: 5em;
    border: dotted;
}

p.overflow-auto { overflow: auto; /* add scrollbars as needed and adjust content accordingly */ }

p.overflow-overlay { overflow: overlay; /* add scrollbars if necessary and place them above the content */ }
<p class="overflow-auto">overflow: auto
Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium.</p>

<p class="overflow-overlay">overflow: overlay
Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium.</p>

The provided code snippet showcases the contrast as depicted below:

p.overflow-auto { overflow: auto; /* add scrollbars as needed and adjust content accordingly */ }

p.overflow-overlay { overflow: overlay; /* add scrollbars if necessary and place them above the content */ }

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