Update client-src\digitize\index.js: Fix #262

client-src/digitize/index.js

@@ -29,3 +29,17 @@ document.forms.namedItem("upload").onsubmit = () => {
     setDisabled("submitBtn", true);
     setIsBusy("submitBtn", true);
 };
+
+// In case the page is newly loaded, reset the upload button, the spinner, and the upload field.
+// This prevents unexpected behaviour when clicking the back button after an upload.
+window.addEventListener("pageshow", () => {
+    setDisabled("submitBtn", true);
+    setIsBusy("submitBtn", false);
+
+    // Remove all previously selected files. The used file selector (filebokz) seems not to
+    // provide a working solution to remove all selected files at once.
+    const removeButtons = document.getElementsByClassName("remove");
+    for (let i = removeButtons.length - 1; i >= 0; i--) {
+        removeButtons[i].click();
+    }
+});