Take advantage of querySelector overload

src/librustdoc/html/static/js/main.js

@@ -1790,14 +1790,12 @@ href="https://doc.rust-lang.org/${channel}/rustdoc/read-documentation/search.htm
      */
     let pendingSidebarResizingFrame = false;
 
-    /** @type {HTMLElement} */
-    // @ts-expect-error
+    /** @type {HTMLElement|null} */
     const resizer = document.querySelector(".sidebar-resizer");
-    /** @type {HTMLElement} */
-    // @ts-expect-error
+    /** @type {HTMLElement|null} */
     const sidebar = document.querySelector(".sidebar");
     // If this page has no sidebar at all, bail out.
-    if (!(resizer instanceof HTMLElement) || !(sidebar instanceof HTMLElement)) {
+    if (!resizer || !sidebar) {
         return;
     }
 
@@ -1813,7 +1811,7 @@ href="https://doc.rust-lang.org/${channel}/rustdoc/read-documentation/search.htm
     // from settings.js, which uses a separate function. It's done here because
     // the minimum sidebar size is rather uncomfortable, and it must pass
     // through that size when using the shrink-to-nothing gesture.
-    function hideSidebar() {
+    const hideSidebar = function hideSidebar() {
         if (isSrcPage) {
             window.rustdocCloseSourceSidebar();
             updateLocalStorage("src-sidebar-width", null);
@@ -1838,30 +1836,30 @@ href="https://doc.rust-lang.org/${channel}/rustdoc/read-documentation/search.htm
             sidebar.style.removeProperty("--desktop-sidebar-width");
             resizer.style.removeProperty("--desktop-sidebar-width");
         }
-    }
+    };
 
     // Call this function to show the sidebar from the resize handle.
     // On docs pages, this can only happen if the user has grabbed the resize
     // handle, shrunk the sidebar down to nothing, and then pulls back into
     // the visible range without releasing it. You can, however, grab the
     // resize handle on a source page with the sidebar closed, because it
     // remains visible all the time on there.
-    function showSidebar() {
+    const showSidebar = function showSidebar() {
         if (isSrcPage) {
             window.rustdocShowSourceSidebar();
         } else {
             removeClass(document.documentElement, "hide-sidebar");
             updateLocalStorage("hide-sidebar", "false");
         }
-    }
+    };
 
     /**
      * Call this to set the correct CSS variable and setting.
      * This function doesn't enforce size constraints. Do that before calling it!
      *
      * @param {number} size - CSS px width of the sidebar.
      */
-    function changeSidebarSize(size) {
+    const changeSidebarSize = function changeSidebarSize(size) {
         if (isSrcPage) {
             updateLocalStorage("src-sidebar-width", size.toString());
             // [RUSTDOCIMPL] CSS variable fast path
@@ -1877,7 +1875,7 @@ href="https://doc.rust-lang.org/${channel}/rustdoc/read-documentation/search.htm
             sidebar.style.setProperty("--desktop-sidebar-width", size + "px");
             resizer.style.setProperty("--desktop-sidebar-width", size + "px");
         }
-    }
+    };
 
     // Check if the sidebar is hidden. Since src pages and doc pages have
     // different settings, this function has to check that.
@@ -1942,7 +1940,7 @@ href="https://doc.rust-lang.org/${channel}/rustdoc/read-documentation/search.htm
     /**
      * @param {PointerEvent=} e
      */
-    function stopResize(e) {
+    const stopResize = function stopResize(e) {
         if (currentPointerId === null) {
             return;
         }
@@ -1959,12 +1957,12 @@ href="https://doc.rust-lang.org/${channel}/rustdoc/read-documentation/search.htm
             resizer.releasePointerCapture(currentPointerId);
             currentPointerId = null;
         }
-    }
+    };
 
     /**
      * @param {PointerEvent} e
      */
-    function initResize(e) {
+    const initResize = function initResize(e) {
         if (currentPointerId !== null || e.altKey || e.ctrlKey || e.metaKey || e.button !== 0) {
             return;
         }
@@ -1988,7 +1986,7 @@ href="https://doc.rust-lang.org/${channel}/rustdoc/read-documentation/search.htm
         const pos = e.clientX - sidebar.offsetLeft - 3;
         document.documentElement.style.setProperty( "--resizing-sidebar-width", pos + "px");
         desiredSidebarSize = null;
-    }
+    };
     resizer.addEventListener("pointerdown", initResize, false);
 }());