title: Check localStorage if item matches string
body: <p>I want to proof if an item exists in localStorage, where the itemID matches a string, to remove it. The clear function works fine, but not without removing everything. Is there any way to do it?</p>
  
  <pre><code>    var myMatch = "test";
      localStorage.setItem("test_1", "value");
  
      -&gt; localStorage.getItem(); // ?
  </code></pre>