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⚡ Bolt: Move scripts to <head> with defer for parallel loading#47

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ImChong merged 1 commit into
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bolt-move-scripts-to-head-13167973991971708968
May 26, 2026
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⚡ Bolt: Move scripts to <head> with defer for parallel loading#47
ImChong merged 1 commit into
mainfrom
bolt-move-scripts-to-head-13167973991971708968

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@ImChong ImChong commented May 26, 2026

💡 What: Moved the application scripts (main.js and lightbox.js) from the bottom of the <body> to the <head> and added the defer attribute across all HTML pages.
🎯 Why: When scripts are placed at the bottom of the <body>, the browser doesn't start downloading them until the HTML parser reaches the end of the file. By moving them to the <head> with the defer attribute, the browser's preload scanner can discover and begin downloading the scripts asynchronously while the HTML is still parsing.
📊 Impact: Improves Time to Interactive (TTI) and overall page load speed by enabling parallel downloading without blocking the render path.
🔬 Measurement: This can be verified by checking the Network tab in DevTools; the download for main.js should start earlier in the waterfall graph, parallel to CSS and other early assets.


PR created automatically by Jules for task 13167973991971708968 started by @ImChong

- Moved `<script src="js/main.js"></script>` and `<script src="js/lightbox.js"></script>` from the end of the `<body>` to the `<head>` and added the `defer` attribute.
- This allows the browser to discover and download the scripts in parallel with HTML parsing without blocking rendering.
- Recorded a critical learning entry in `.jules/bolt.md`.

Co-authored-by: ImChong <74563097+ImChong@users.noreply.github.com>
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@ImChong ImChong merged commit 79853f6 into main May 26, 2026
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@ImChong ImChong deleted the bolt-move-scripts-to-head-13167973991971708968 branch May 26, 2026 15:29
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