Can Flexbox Achieve Dynamic Reordering Without Compromising SEO?

CSS-Only Reordering with Flexbox

Challenge:

To maintain a search engine-friendly and semantic DOM structure while showcasing elements in specific positions without unnecessary duplication.

Layout Requirements:

• Flexbox-based layout with vertical centering on desktops
• No known or fixed heights
• Tag-team behavior for the right column on desktops
• Support for IE11

Feasibility:

CSS-Only Solution:

Unfortunately, CSS-only flexbox does not natively support such complex reordering. However, a compromise is possible by utilizing fixed heights:

<code class="css">.flex {
  height: 90vh;
  flex-flow: column wrap;
}
.flex div {
  flex: 1;
  width: 50%;
}
.flex div:nth-child(2) {
  order: -1;
}</code>

JS-Based Solution:

Alternatively, you can cut out the green div and paste its content into the pink one using JavaScript. This approach may introduce performance and flickering concerns, but it can be tailored to specific scenarios.

Example with Fixed Heights:

The following code demonstrates a working CSS-only solution using fixed heights:

<code class="css">.flex {
  height: 90vh;
}</code>

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