Fixed inconsistent header shadow behavior

material/base.html

@@ -217,7 +217,7 @@
       </script>
     {% endblock %}
     {% block scripts %}
-      <script src="{{ 'assets/javascripts/bundle.7865d441.min.js' | url }}"></script>
+      <script src="{{ 'assets/javascripts/bundle.749317b4.min.js' | url }}"></script>
       {% for path in config["extra_javascript"] %}
         <script src="{{ path | url }}"></script>
       {% endfor %}

material/overrides/assets/javascripts/bundle.e7fa8c09.min.js

@@ -15,5 +15,5 @@ LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 PERFORMANCE OF THIS SOFTWARE.
 ***************************************************************************** */
-//# sourceMappingURL=bundle.25e8c307.min.js.map
+//# sourceMappingURL=bundle.e7fa8c09.min.js.map
 

material/overrides/main.html

@@ -35,5 +35,5 @@
 {% endblock %}
 {% block scripts %}
   {{ super() }}
-  <script src="{{ 'overrides/assets/javascripts/bundle.25e8c307.min.js' | url }}"></script>
+  <script src="{{ 'overrides/assets/javascripts/bundle.e7fa8c09.min.js' | url }}"></script>
 {% endblock %}

src/assets/javascripts/browser/element/size/index.ts

@@ -125,6 +125,13 @@ export function getElementContentSize(el: HTMLElement): ElementSize {
  * termination. Note that this function should not be called with the same
  * element twice, as the first unsubscription will terminate observation.
  *
+ * Sadly, we can't use the `DOMRect` objects returned by the observer, because
+ * we need the emitted values to be consistent with `getElementSize`, which will
+ * return the used values (rounded) and not actual values (unrounded). Thus, we
+ * use the `offset*` properties. See the linked GitHub issue.
+ *
+ * @see https://bit.ly/3m0k3he - GitHub issue
+ *
  * @param el - Element
  *
  * @returns Element size observable
@@ -139,10 +146,7 @@ export function watchElementSize(
         .pipe(
           filter(({ target }) => target === el),
           finalize(() => observer.unobserve(el)),
-          map(({ contentRect }) => ({
+          map(() => getElementSize(el))
-            width:  contentRect.width,
-            height: contentRect.height
-          }))
         )
       ),
       startWith(getElementSize(el))