From f5e4b4bef483c8dda13fee181df250f36ed48b6a Mon Sep 17 00:00:00 2001
From: Willy-JL <49810075+Willy-JL@users.noreply.github.com>
Date: Wed, 16 Oct 2024 11:52:44 +0100
Subject: [PATCH] JS: Types for chr(), .indexOf(), .slice()

---
 applications/system/js_app/types/global.d.ts | 21 ++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/applications/system/js_app/types/global.d.ts b/applications/system/js_app/types/global.d.ts
index b3e4aac33..01a8fbcef 100644
--- a/applications/system/js_app/types/global.d.ts
+++ b/applications/system/js_app/types/global.d.ts
@@ -56,6 +56,15 @@ declare const __filepath: string;
  */
 declare function load(path: string): any;
 
+/**
+ * @brief Return 1-byte string whose ASCII code is the integer `n`
+ * 
+ * If `n` is not numeric or outside of `0-255` range, `null` is returned
+ * 
+ * @param n The ASCII code to convert to string
+ */
+declare function chr(n: number): string | null;
+
 /**
  * @brief mJS Foreign Pointer type
  * 
@@ -189,6 +198,18 @@ declare class String {
      * See `charCodeAt`
      */
     at(index: number): number;
+    /**
+     * @brief Return index of first occurence of substr within the string or `-1` if not found
+     * @param substr The string to search for
+     * @param fromIndex The index to start searching from
+     */
+    indexOf(substr: string, fromIndex?: number): number;
+    /**
+     * @brief Return a substring between two indices
+     * @param start The index to start substring at
+     * @param end The index to end substring at
+     */
+    slice(start: number, end?: number): string;
 }
 
 declare class Boolean { }