text: import React, { Component } from "react";
  import { CSSTransition } from "react-transition-group";
  import { connect } from "react-redux";
  import ContactForm from "./form/Form";
  import Filter from "./filter/Filter";
  import ContactList from "./contactList/ContactList";
  import Layout from "./layuot/Layout";
  import { fetchContacts } from "../redux/contacts/contactsOperations";
  import { getLoading } from "../redux/contacts/contactsSelectors";
  import styles from "./App.module.css";
  
  class App extends Component {
    componentDidMount() {
      this.props.fetchContacts();
    }
  
    render() {
      return (
        <Layout>
          <CSSTransition
            in={true}
            appear={true}
            timeout={500}
            classNames={styles}
            unmountOnExit
          >
            {(stage) => {
              return (
                <>
                  <h1 className={styles.title}>Phonebook</h1>
                  <CSSTransition
                    in={stage === "entered"}
                    appear={true}
                    timeout={500}
                    classNames={styles}
                    unmountOnExit
                  >
                    <ContactForm addToContacts={this.addToContacts} />
                  </CSSTransition>
                  <CSSTransition
                    in={stage === "entered"}
                    appear={true}
                    timeout={500}
                    classNames={styles}
                    unmountOnExit
                  >
                    <>
                      <h2 className={styles.title}>Contacts</h2>
                      <CSSTransition
                        in={true}
                        appear={true}
                        timeout={500}
                        classNames={styles}
                        unmountOnExit
                      >
                        <Filter />
                      </CSSTransition>
                      <CSSTransition
                        in={true}
                        appear={true}
                        timeout={500}
                        classNames={styles}
                        unmountOnExit
                      >
                        <ContactList />
                      </CSSTransition>
                    </>
                  </CSSTransition>
                </>
              );
            }}
          </CSSTransition>
        </Layout>
      );
    }
  }
  
  const mapStateToProps = (state) => ({
    isLoading: getLoading(state),
  });
  const mapDispatchToProps = {
    fetchContacts: fetchContacts,
  };
  
  export default connect(mapStateToProps, mapDispatchToProps)(App);
  