Completed 2.7 (phonebook step2)

2026-06-05 15:08:33 +09:00 · 2021-08-27 20:39:33 +07:00
parent 7edc7c319f
commit 5b5837770a
1 changed files with 7 additions and 2 deletions
@@ -16,7 +16,12 @@ const App = () => {
    const newPerson = {
      name: newName
    }
-    setPersons(persons.concat(newPerson))
+
+    // Check if newName already added to phonebook or not
+    const check = persons.filter(person => person.name === newName )
+    check.length === 0 ? setPersons(persons.concat(newPerson)) : alert(`${newName} is already added to phonebook`)
+
+    
    setNewName('')
  }