在模态打开时向正文添加样式

Question

我只想在打开模态弹出窗口时为正文添加样式。之后，当模式弹出窗口关闭时，它需要删除。我刚刚尝试使用此代码。但根本不起作用。

if( $('.modal').hasClass('in') === true ) {
  $('body').style({ 'overflow': "hidden" });
  } 

这是小提琴

https://jsfiddle.net/DTcHh/56667/

Answer 1

修改初始化对话框的代码使用：

$(elm).dialog({
   ...
   , open: function() { $("body").css({ "overflow":"hidden" }); }
   , close: function() { $("body").css({ "overflow":"" }); }
});

Answer 2

您可以尝试shown.bs.modal和hidden.bs.modal的事件。此外，您使用了错误的功能style您需要将其更改为css。

$('#myModal').on('shown.bs.modal', function(){
  $('body').css({ 'overflow': "hidden" });
}).on('hidden.bs.modal', function(){
  $('body').css({ 'overflow': "auto" });
});

$('#myModal').on('shown.bs.modal', function(){
  $('body').css({ 'overflow': "hidden" });
}).on('hidden.bs.modal', function(){
  $('body').css({ 'overflow': "auto" });
})

@import url('//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap-theme.min.css');
body {
    margin: 10px;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link href="https://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<!-- Button trigger modal -->
<button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
  Open modal
</button>
<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title" id="myModalLabel">Modal title</h4>
      </div>
      <div class="modal-body">
        ...
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal1" data-dismiss="modal">
  Open modal
</button>
      </div>
    </div>
  </div>
</div>
<!-- Modal1 -->
<div class="modal fade" id="myModal1" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title" id="myModalLabel">Modal title</h4>
      </div>
      <div class="modal-body">
        ...
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
      </div>
    </div>
  </div>
</div>

演示

Answer 3

您可以使用引导模式事件。 https://getbootstrap.com/docs/3.3/javascript/#modals-events

$('.modal').on('shown.bs.modal', function (e) {
  $('body').style({ 'overflow': "hidden" });
})

Answer 4

与其用JavaScript更改CSS，我建议你改用HTML类：

var $body = $('body');
$('#myModal').on({
    'show.bs.modal': function() { $body.addClass('visible') },
    'hide.bs.modal': function() { $body.removeClass('visible') }
});

和 CSS：

body {
    transition: .5s background;
}
body.visible {
    background: red;
}

这是jFiddle。