How Can I Reorder Block Elements Using Only CSS?

Switching Block Element Order with CSS

In this scenario, we're given HTML code where three block elements are arranged vertically: Block A, Block B, and Block C. The challenge is to reorder these elements in a specific order using only CSS, while preserving the display:block property.

Using CSS media queries, we can selectively apply order properties to the elements based on the screen width. For example, considering the scenario where an iPhone app advertisement should be displayed first on mobile devices, we can implement the following:

@media only screen and (max-device-width: 480px) {
  #blockC {
    order: 1; /* Move Block C to the top */
  }
}

Now, when the screen width is less than or equal to 480px, Block C will be rendered above Block A and Block B. This achieves the desired reordering without compromising the block element's behavior.

Here's a more detailed example using modern CSS:

<div>

@media screen and (max-width: 300px) {
  #parent {
    display: flex;
    flex-flow: column;
  }
  #a {
    order: 2;
  }
  #c {
    order: 1;
  }
  #b {
    order: 3;
  }
}

In this example, when the screen width is reduced to 300px or less, the elements will be reordered as: Block C, Block A, Block B. The flexbox layout ensures that the elements remain block-like, stacking vertically and respecting their natural height and width.

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