Check crate version compatibility in docs.rs

extension/script/docs-rs-check-crate.js

@@ -0,0 +1,17 @@
+(function () {
+    if (!window.searchState?.descShards) {
+        let button = document.querySelector(".add-to-extension");
+        if (button) {
+            button.classList.add("add-to-extension-disabled");
+            button.onclick = (event) => {
+                // Prevent click event propagation to parent element.
+                event.stopImmediatePropagation();
+            };
+        }
+        let content = document.querySelector(".add-to-extension-content");
+        if (content) {
+            content.innerHTML = `<p>This crate version is not supported by Rust Search Extension. <br><br>After Rust Search Extension v2.0 has been released, we only support crate published after 2024-04-20.</p>`;
+        }
+        console.log("No searchState.descShards found, cannot add this crate to Rust Search Extension.");
+    }
+})();

extension/script/docs-rs.css

@@ -98,6 +98,12 @@ div.nav-container form.landing-search-form-nav {
     margin: 5.4px 16px 4.4px;
 }
 
+.add-to-extension-disabled {
+    background-color: #9e9c8e !important;
+    cursor: not-allowed !important;
+    color: #666 !important;
+}
+
 .add-to-extension:hover {
     color: #121212;
     background-color: #F9BB2D;

extension/script/docs-rs.js

@@ -106,6 +106,7 @@ document.addEventListener("DOMContentLoaded", async () => {
         } else {
             insertAddToExtensionElement("need-to-install");
         }
+        injectScripts(["script/docs-rs-check-crate.js"]);
     }