From 09054d2134e97ca96285308d9cb9eb838a7ab497 Mon Sep 17 00:00:00 2001
From: Christoph Urlacher <christoph.urlacher@protonmail.com>
Date: Mon, 3 Feb 2025 09:06:34 +0100
Subject: [PATCH] Lib: Implement helper to remove formData fields

---
 src/lib/form.ts | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/lib/form.ts b/src/lib/form.ts
index cec1557..5e96e65 100644
--- a/src/lib/form.ts
+++ b/src/lib/form.ts
@@ -37,6 +37,23 @@ export const form_data_clean = (data: FormData, except: string[] = []): FormData
   return data;
 };
 
+/**
+ * Remove the specified [keys] from the [data] object.
+ */
+export const form_data_remove = (data: FormData, keys: string[]): void => {
+  let delete_keys: string[] = [];
+
+  for (const [key, value] of data.entries()) {
+    if (keys.includes(key)) {
+      delete_keys.push(key);
+    }
+
+    delete_keys.forEach((key) => {
+      data.delete(key);
+    });
+  }
+};
+
 /**
  * Throws SvelteKit error(400) if form_data does not contain key.
  */