rustdoc: fix `current` class on sidebar modnav

1 files changed, 5 insertions, 3 deletions

diff --git a/src/librustdoc/html/static/js/main.js b/src/librustdoc/html/static/js/main.js
index 64c35660778..116ce615d8c 100644
--- a/src/librustdoc/html/static/js/main.js
+++ b/src/librustdoc/html/static/js/main.js
@@ -529,13 +529,15 @@ function preLoadCss(cssUrl) {
                 }
                 const link = document.createElement("a");
                 link.href = path;
-                if (path === current_page) {
-                    link.className = "current";
-                }
                 link.textContent = name;
                 const li = document.createElement("li");
                 li.appendChild(link);
                 ul.appendChild(li);
+                // Don't "optimize" this to just use `path`.
+                // We want the browser to normalize this into an absolute URL.
+                if (link.href === current_page) {
+                    li.classList.add("current");
+                }
             }
             sidebar.appendChild(h3);
             sidebar.appendChild(ul);