From 44ff6231441024d16fddc2b7cb648539522b04cb Mon Sep 17 00:00:00 2001
From: Maksymilian Jopek <maks@jopek.eu>
Date: Mon, 19 Dec 2022 21:04:23 +0100
Subject: v1.0.0 Added everything that's in the spec

---
 src/lib/Saving.ts | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

(limited to 'src/lib/Saving.ts')

diff --git a/src/lib/Saving.ts b/src/lib/Saving.ts
index 0d71057..8017fd1 100644
--- a/src/lib/Saving.ts
+++ b/src/lib/Saving.ts
@@ -8,18 +8,19 @@ export function save(grid: Grid) {
   a.download = "sudoku-save.json";
   a.click();
 }
-export function readGridFromFile(f: File): Promise<string[][] | null> {
+export function readGridFromFile(f?: File): Promise<string[][] | null> {
   return new Promise(res => {
     let reader = new FileReader();
     reader.onload = e => {
       try {
-        //@ts-expect-error
-        const json = JSON.parse(e.target.result);
-        res(json)
+        if (typeof e.target?.result === "string")
+          res(JSON.parse(e.target.result))
+        else
+          res(null)
       } catch (error) {
         res(null)
       }
     };
-    reader.readAsText(f);
+    f ? reader.readAsText(f) : f;
   })
 }
-- 
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