Make a head yaml key to add custom js imports to pages

_includes/default_head_tags.html

@@ -46,9 +46,6 @@ See: https://developers.google.com/search/docs/advanced/mobile/google-discover?h
 <link rel="stylesheet" href="/assets/css/styles.css">
 <script src="/assets/js/index.js"></script>
 
-<script type="module" src="/assets/js/model-viewer.js"></script>
-
-
 <script>
   MathJax = {
     tex: {
@@ -62,4 +59,8 @@ See: https://developers.google.com/search/docs/advanced/mobile/google-discover?h
 <script src="/assets/mathjax/tex-mml-svg.js" id="MathJax-script" async></script>
 
 <!-- RSS feed -->
-{% feed_meta %}
+{% feed_meta %}
+
+{% if page.head %}
+{{ page.head }}
+{% endif %} 

_posts/2023-02-10-shelves.md

@@ -6,6 +6,7 @@ image: /assets/blog/shelves/thumb.svg
 social_image: /assets/social/shelves.png
 alt: A 3D render of some shelves fitting into a triangular space under a ladder.
 assets: /assets/blog/shelves
+head: <script type="module" src="/assets/js/model-viewer.js"></script>
 ---
 
 <figure>

_posts/2023-06-21-my_first_PCB.md

@@ -7,6 +7,7 @@ commentid: 110810437631337327
 hide_image: true # Only use this image for static previews
 social_image: /assets/social/pcb_1.png
 alt: A 3D render of a simple PCB.
+head: <script type="module" src="/assets/js/model-viewer.js"></script>
 ---
 I made my first PCB!
 

_posts/2023-07-31-toothbrush-holder.md

@@ -6,6 +6,7 @@ layout: post
 hide_image: true # Only use this image for static previews
 image: /assets/blog/toothbrush_shelf/spin.gif
 alt: A render of a 3D printed shelf sitting above a shaver outlet, it spins slowly. 
+head: <script type="module" src="/assets/js/model-viewer.js"></script>
 ---
 
 It can be hard to find genuine everyday uses of 3D printing, but after a while you do find some! I made this little shelf to tidy up the wires to our devices in the bathroom. The wires are now hidden, coiled up, inside the shelf.

_posts/2023-08-17-maps.md

@@ -5,6 +5,7 @@ excerpt: |
     I want to make some really big laser etched maps.
 
 image: /assets/blog/maps/tests.jpeg
+head: <script type="module" src="/assets/js/model-viewer.js"></script>
 ---
 
 There's something fascinating about maps. I particularly love how they have this kind of fractal level of detail as you zoom in and out. Look at this one, I really like the minimalist black and white design.

_posts/2023-08-23-weekend_builds-1.md

@@ -6,6 +6,7 @@ excerpt: |
 
 image: /assets/blog/weekend_builds_1/stool.jpeg
 assets: /assets/blog/weekend_builds_1/
+head: <script type="module" src="/assets/js/model-viewer.js"></script>
 ---
 
 Here's a quick one, using the aforementioned massive lasercutter at my makerspace, I made this little pot stand out of lasercut ply. 

index.md

@@ -4,6 +4,7 @@ layout: default
 permalink: /
 redirect_from:
   - /blog/
+head: <script type="module" src="/assets/js/model-viewer.js"></script>
 ---
 {% for post in site.posts %}
 <article class="h-entry">