What are some clues in the source that hint at or prove that it's designed in Vue? Shouldn't it have a line like this?
<script src="https://cdn.jsdelivr.net/npm/vue@2.6.14"></script>
That wasn't in the html. Can similar clues be found in other websites to show that they're designed in other JavaScript frameworks like React or Angular?
I just use the Chrome extension: Library Detector