minor

1-js/04-object-basics/01-object/article.md

@@ -322,7 +322,7 @@ alert( *!*key*/!* in user ); // true, takes the name from key and checks for suc
 ```
 
 ````smart header="Using \"in\" for properties that store `undefined`"
-Usually, the strict comparison `"=== undefined"` check works fine. But there's a special case when it fails, but `"in"` works correctly.
+Usually, the strict comparison `"=== undefined"` check the property existance just fine. But there's a special case when it fails, but `"in"` works correctly.
 
 It's when an object property exists, but stores `undefined`:
 
@@ -569,7 +569,7 @@ user.age = 25; // (*)
 alert(user.age); // 25
 ```
 
-It might seem that the line `(*)` would cause an error, but no, there's totally no problem. That's because `const` fixes the value of `user` itself. And here `user` stores the reference to the same object all the time. The line `(*)` goes *inside* the object, it doesn't reassign `user`.
+It might seem that the line `(*)` would cause an error, but no, there's totally no problem. That's because `const` fixes only value of `user` itself. And here `user` stores the reference to the same object all the time. The line `(*)` goes *inside* the object, it doesn't reassign `user`.
 
 The `const` would give an error if we try to set `user` to something else, for instance: