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+---
+title: "Jekyll 4.2.1 Released"
+date: 2021-09-27 14:45:46 +0530
+author: ashmaroli
+version: 4.2.1
+category: release
+---
+
+Hello Jekyllers!
+
+The Jekyll team is happy to announce the release of `v4.2.1` which fixes a couple of
+regressions introduced in `v4.2.0` and another bug inherited from Jekyll 3.
+
+In `v4.2.0`, we decided to stop overriding {% raw %}`{{ site.url }}`{% endraw %} with
+the *localhost* address when running the command `jekyll serve` with the default
+*development* mode. While the intent behind the change was to avoid forcing users to
+generate a *production build* separately by invoking `jekyll build`, it however had an
+unforeseen consequence — absolute URLs for assets now pointed to
+resources that were at times not yet been deployed to the configured `site.url`. That
+broke the users' local development workflow.
+
+`v4.2.0` also added a series of optimizations surrounding the generation of Liquid
+representation for a site's standalone pages and layouts. However, that prevented
+{% raw %}`{{ page.content }}`{% endraw %} and other mutable attributes from reflecting
+the latest state of the requested attribute, thereby breaking the render of all resources
+that were dependent on such mutable attributes.
+
+The last fix included in this release addresses the issue where incremental regeneration
+ignored changes to documents in collections when the site is configured to use a custom
+`collections_dir` for all collections.
+
+Special thanks to @benik for helping us understand the regression caused by the decision
+to stop overriding `site.url` and proposing to revert the change. Another special thanks
+to @pdmosses for helping us discover the regression surrounding Liquid representation of
+pages by providing with a test repository.
+
+<div style="padding:8px 0 2px;text-align:center;background:rgba(240,0,0,0.1)">
+  :bouquet: <span style="margin:0 6px;font-size:0.75em;vertical-align:top">
+  Dedicated to our colleague Frank who passed away recently</span> :bouquet:
+</div>