breaking up into stages

step1-05/exercise/src/components/TodoHeader.tsx

@@ -0,0 +1,20 @@
+import React from 'react';
+
+export class TodoHeader extends React.Component {
+  render() {
+    return (
+      <header>
+        <h1>todos</h1>
+        <div className="addTodo">
+          <input className="textfield" placeholder="add todo" />
+          <button className="submit">Add</button>
+        </div>
+        <nav className="filter">
+          <button className="active">all</button>
+          <button>active</button>
+          <button>completed</button>
+        </nav>
+      </header>
+    );
+  }
+}