vue _ is not defined code example
Example 1: Vue is not defined
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/1.0.18/vue.min.js"></script>
Example 2: Uncaught ReferenceError: Vue is not defined
<script src="http://code.jquery.com/ui/1.12.1/jquery-ui.min.js">
</script>