初次提交项目

static/js/scanner.js

@@ -0,0 +1,20 @@
+(function () {
+    const input = document.getElementById("scan-input");
+    const form = document.getElementById("scan-search-form");
+
+    if (!input || !form) {
+        return;
+    }
+
+    // Keep focus for barcode scanners that type and send Enter immediately.
+    window.addEventListener("load", function () {
+        input.focus();
+    });
+
+    document.addEventListener("keydown", function (event) {
+        if (event.key === "Escape") {
+            input.value = "";
+            input.focus();
+        }
+    });
+})();