import React from "react";

export class Header extends React.Component {
    render() {
        return(
            <nav className="navbar navbar-default">
                <div className="container">
                    <div className="navbar-header">
                        <ul className="className nav navbar-nav">
                            <li><a href="#">Home</a></li>
                        </ul>
                    </div>
                </div>
            </nav>
        );
    }
}
@@ -289,18 +289,8 @@
 me=%22
-className 
 nav 
@@ -477,8 +477,9 @@
 %0A    %7D%0A%7D
+%0A

Update Header.js