title: Property 'replaceAll' does not exist on type 'string'
body: <p>I want to use <code>replaceAll</code> in typescript and angular 10.</p>
  <p>But I get this error: <strong>Property 'replaceAll' does not exist on type 'string'</strong>.</p>
  <p>This is my code:</p>
  <pre><code>let date=&quot;1399/06/08&quot;
  console.log(date.replaceAll('/', '_'))
  </code></pre>
  <p>Output: 13990608</p>
  <p>How can fix my typescript to show me this function?</p>