Added the JavaScript getInstances method to the SummaryEditor and AccountSelector classes, so that it is easier to deal with the case when the debit and credit versions are not both exist.

src/accounting/static/js/account-selector.js

@@ -206,4 +206,19 @@ class AccountSelector {
             this.#clearButton.disabled = false;
         }
     }
+
+    /**
+     * Returns the account selector instances.
+     *
+     * @param entryEditor {JournalEntryEditor} the journal entry editor
+     * @return {{debit: AccountSelector, credit: AccountSelector}}
+     */
+    static getInstances(entryEditor) {
+        const selectors = {}
+        const modals = Array.from(document.getElementsByClassName("accounting-account-selector"));
+        for (const modal of modals) {
+            selectors[modal.dataset.entryType] = new AccountSelector(entryEditor, modal.dataset.entryType);
+        }
+        return selectors;
+    }
 }