Can Inline CSS Handle Media Queries for Dynamic Image Loading?

Inline CSS @media Rules: A Feasible Approach?

In web development, dynamically loading banner images based on screen width is a common requirement. One potential solution is to utilize inline CSS @media rules to determine the screen width and display the appropriate image. However, the feasibility of this approach has raised questions.

Inline CSS Constraints

Unfortunately, inline CSS attributes are limited in their syntax and cannot accommodate @media at-rules or media queries. As per the CSS specification, the style attribute's value must conform to the syntax of CSS declaration block contents, which excludes these constructs.

Alternative Solutions

Therefore, the primary option for applying media-specific styles to a specific element is to define a отдельное правило in a stylesheet:

#myelement {
  background-image: url(particular_ad.png);
}

@media (max-width: 300px) {
  #myelement {
    background-image: url(particular_ad_small.png);
  }
}

For cases where isolating the element using a selector is challenging, custom properties provide a viable solution, assuming support for variable assignment is not an issue:

:root {
  --particular-ad: url(particular_ad.png);
}

@media (max-width: 300px) {
  :root {
    --particular-ad: url(particular_ad_small.png);
  }
}

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