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Is Progressive Enhancement Dead Yet? (video, 8 mins)
- Another Heydon Pickering ‘Web Briefs’ video, with a somewhat clickbaity title. This isn’t an analysis of frontend strategies in 2021, but a characteristically opinionated explanation of what good vs bad progressive enhancement looks like. In it, Heydon reinforces that:
- Sites should be functional and have decent layouts by default. Using CSS
supportschecking, you can progressively enhance to better layouts, and should not use JavaScript to ‘fill in’ unsupported CSS because it’s inefficient at rendering. JS modules should be imported using<script type="module">, which is ignored by older browsers. - Progressive enhancement is not displaying a “Please turn on JavaScript” message, or rendering HTML only for it to re-render with JS ‘hydration’.
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