javascript - Jquery 事件不工作

Question

我制作了这个 Jquery 事件并想在我的按钮上应用不透明度，但它不起作用。请帮忙!

<button type="button" id="btn-opacity" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
  Sign-Up
</button>

button#btn-opacity {
    background-color: aqua;
    border: hidden;
}

$(document).ready(function() {
    $('#btn-opacity').mouseenter(function(event) {
        /* Act on the event */
        $(this).fadeTo('slow', 0.3);
    });
}); 

Answer 1

这是您要查找的内容:

   $(document).ready(function() {
        $('#btn-opacity').mouseenter(function(event) {
          /* Act on the event */
          $(this).css('opacity', 0.3);
        });
        $('#btn-opacity').mouseleave(function(event) {
          /* Act on the event */
          $(this).css('opacity', 1);
        });
      }); 

button#btn-opacity {
  background-color: aqua;
  border: hidden;
}
button {
  transition: all .3s ease-in;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<button type="button" id="btn-opacity" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
  Sign-Up
</button>