title: Firebase app give error "Uncaught TypeError: firebase.store is not a function" although I imported firebase storage
body: <p>I am new in firebase.I created app that connect to database and create new id in it.</p>
  <pre><code>const db = firebase.store();
  
  </code></pre>
  <p>my db variable is not reachable.<a href="https://i.stack.imgur.com/ihiF1.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ihiF1.png" alt="enter image description here" /></a></p>