title: How to insert a value of id in a querySelector?
body: <p>I have this code in html:</p>
  <pre><code>&lt;div class=&quot;bet_balance&quot;&gt;
      &lt;span&gt;Balance:
          &lt;strong&gt;&lt;b id=&quot;balance_r&quot; style=&quot;&quot;&gt;44&lt;/b&gt; &lt;b class=&quot;balance_type&quot;&gt;&lt;/b&gt;&lt;/strong&gt;
      &lt;/span&gt;
      &lt;i id=&quot;balance_update&quot;&gt;&lt;/i&gt;
  &lt;/div&gt;
  </code></pre>
  <p>And this code in JS:</p>
  <pre><code>document.querySelector('#message_text').value = '/send 1327877 **#balance_r**';
  </code></pre>
  <p>How i can take value of id(balance_r),and to put them in this querySelector after value '/send 1327877'?</p>