javascript - 当窗口大小调整时，按钮应该以不同的方式工作

Question

$(document).ready(function(){
if ($(window).width < '700') 
{
    $(".fevent").removeAttr('data-toggle data-target aria-expanded aria-controls');
    $(".fevent").attr({"data-toggle":"collapse", "data-target":"#bol", "aria-expanded":"false", "aria-controls":"bol"});
    $(".fevent").on("click",function(){
    $("#bol").collapse('toggle');
    });
} else if ($(window).width > '700') 
{
    $(".fevent").removeAttr('data-toggle data-target aria-expanded aria-controls');
    $(".fevent").attr({"data-toggle":"collapse", "data-target":"#col", "aria-expanded":"false", "aria-controls":"col"});
    $(".fevent").on("click", function(){
    $("#col").collapse('toggle');
    });
}
});

.fvent 是按钮的类，当我调整窗口大小时，按钮的功能应该有所不同， 当窗口小于 700 时，单击按钮显示 div id #bol 否则 #col 。

当我将窗口大小调整为小于 700 时，该按钮在宽度 > 700 的情况下工作，它仍然在宽度 > 700 的情况下工作。

请帮帮我!!!

Answer 1

您不需要为此使用任何额外的 JavaScript。只需使用 2 个按钮并通过媒体查询显示和隐藏它们:

.btn.col {
  display:none;
}

@media (min-width: 700px) {
  .btn.col {
    display:inline-block;
  }
  .btn.bol {
    display:none;
  }
}

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<button class="btn btn-primary bol" type="button" data-toggle="collapse" data-target="#bol" aria-expanded="false" aria-controls="bol">Toggle bol</button>
<button class="btn btn-primary col" type="button" data-toggle="collapse" data-target="#col" aria-expanded="false" aria-controls="col">Toggle col</button>
<div class="row">
  <div class="col">
    <div class="collapse" id="col">
      <div class="card card-body">
        Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec venenatis enim ornare, ullamcorper ipsum ut, bibendum mi. Quisque sit amet velit dignissim, tincidunt neque nec, consequat dolor.
      </div>
    </div>
  </div>
</div>
<div class="row">
  <div class="col">
    <div class="collapse" id="bol">
      <div class="card card-body">
        Vivamus auctor commodo nisl ut vestibulum. Aliquam erat volutpat. Aliquam eu leo non nunc ullamcorper fermentum. Donec vehicula dolor sed augue maximus, non congue urna semper.
      </div>
    </div>
  </div>
</div>