Added support for using .mjs files in extra_javascript

docs/schema.json

@@ -98,7 +98,7 @@
       "items": {
         "title": "Path to JavaScript file",
         "markdownDescription": "https://squidfunk.github.io/mkdocs-material/customization/#additional-javascript",
-        "pattern": "\\.js($|\\?)"
+        "pattern": "\\.m?js($|\\?)"
       },
       "uniqueItems": true,
       "minItems": 1

material/base.html

@@ -242,7 +242,11 @@
     {% block scripts %}
       <script src="{{ 'assets/javascripts/bundle.b4d07000.min.js' | url }}"></script>
       {% for path in config.extra_javascript %}
-        <script src="{{ path | url }}"></script>
+        {% if path.endswith(".mjs") %}
+          <script type="module" src="{{ path | url }}"></script>
+        {% else %}
+          <script src="{{ path | url }}"></script>
+        {% endif %}
       {% endfor %}
     {% endblock %}
   </body>

src/base.html

@@ -420,7 +420,11 @@
 
       <!-- Custom JavaScript -->
       {% for path in config.extra_javascript %}
-        <script src="{{ path | url }}"></script>
+        {% if path.endswith(".mjs") %}
+          <script type="module" src="{{ path | url }}"></script>
+        {% else %}
+          <script src="{{ path | url }}"></script>
+        {% endif %}
       {% endfor %}
     {% endblock %}
   </body>