From 1c50948c6c6b6b7a4a022457835a1a3571cd6126 Mon Sep 17 00:00:00 2001
From: Julian Schurhammer <julian.schurhammer@gmail.com>
Date: Sun, 14 Aug 2022 00:01:10 +1200
Subject: js map: decode from Map or Object

---
 src/gleam_stdlib.mjs | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src')

diff --git a/src/gleam_stdlib.mjs b/src/gleam_stdlib.mjs
index 64dc1d0..8c08cb8 100644
--- a/src/gleam_stdlib.mjs
+++ b/src/gleam_stdlib.mjs
@@ -621,6 +621,13 @@ export function decode_result(data) {
 }
 
 export function decode_map(data) {
+  if (data instanceof Map) {
+    return new Ok(PMap.fromMap(data));
+  }
+  const proto = Object.getPrototypeOf(data);
+  if (proto === Object.prototype || proto === null) {
+    return new Ok(PMap.fromObject(data));
+  }
   return data instanceof PMap ? new Ok(data) : decoder_error("Map", data);
 }
 
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