Convert src/runtime/internal/spread.ts to JavaScript

src/runtime/internal/spread.ts

@@ -1,41 +1,42 @@
+/** @returns {{}} */
 export function get_spread_update(levels, updates) {
     const update = {};
-
     const to_null_out = {};
     const accounted_for = { $$scope: 1 };
-
     let i = levels.length;
     while (i--) {
         const o = levels[i];
         const n = updates[i];
-
         if (n) {
             for (const key in o) {
-				if (!(key in n)) to_null_out[key] = 1;
+                if (!(key in n))
+                    to_null_out[key] = 1;
             }
-
             for (const key in n) {
                 if (!accounted_for[key]) {
                     update[key] = n[key];
                     accounted_for[key] = 1;
                 }
             }
-
             levels[i] = n;
-		} else {
+        }
+        else {
             for (const key in o) {
                 accounted_for[key] = 1;
             }
         }
     }
-
     for (const key in to_null_out) {
-		if (!(key in update)) update[key] = undefined;
+        if (!(key in update))
+            update[key] = undefined;
     }
-
     return update;
 }
-
+/** @returns {any} */
 export function get_spread_object(spread_props) {
     return typeof spread_props === 'object' && spread_props !== null ? spread_props : {};
 }
+
+
+
+