<html><body><div class="modal fade" id="myModal">
<div class="modal-dialog modal-xl" role="document">
<div class="modal-content">Hello Modal</div></div></div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js"></script>
<script> function showModal { $('#myModal').modal('show') }</script>
</body></html>
调用 showModal 时:
未捕获的类型错误:$(...).modal 不是函数
我究竟做错了什么?