如何检查bootstrap-4模态是否已打开? [英] how to check if bootstrap-4 modal already open?
问题描述
我想检查某个模态是否已经打开，我已经尝试过这种方法(bootstrap-4)，但对我却不起作用(即使对话框已打开，也总是给出"false")
I want to check if a certain modal is already open , I have tried this methods (bootstrap-4) but didn't work for me (always give 'false' even if the dialog is open)
$('#myModal').is(':visible');
$('#myModal').data('bs.modal').isShown ;
$('#myModal').hasClass('in');
我检查了模态classList，在屏幕上可见后没有添加任何新类到我的模态
I checked modal classList , no any new class added to my modal after it became visible to the screen
我不需要事件处理程序，因为我不想跟踪状态，我只想检查对话框是否以前通过其他功能打开了
I don't want event handlers as I don't want to track the status , I just want to check if the dialog was previously open via some other function
推荐答案
引导程序模式(v4 )是显示，据我所知，DOM中发生了三件事，该模式获得了两个名为 fade 和 show的类.，以及带有 display 到 block 的样式属性(以及我的其他人，例如 padding ...)和body 标签获得一个名为 modal-open 的类.因此，您真正要做的就是检查其中一项内容，我建议您检查 show 类的现有内容.
when a bootstrap modal (v4) is shown, as far as i can notice, three things happens in the DOM, the modal gets a two classes named fade and show respectively, and a style property with display to block (and mybe others like padding...) and the body tag gets a class named modal-open. So realy all you have to do is to check for one of those things, i recommend to check the existing of the show class.
$('#exampleModal').hasClass('show'); // return true if the modal is open
或
$('body').hasClass('modal-open');
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<title>Bootstrap modal</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css" integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.3/umd/popper.min.js" integrity="sha384-vFJXuSJphROIrBnz7yo7oB41mKfc8JzQZiCq4NCceLEaO4IHwicKwpJf9c9IpFgh" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js" integrity="sha384-alpBpkh1PFOepccYVYDB4do5UnbKysX5WZXm3XxPqe5iKTfUKjNkCk9SaVuEZflJ" crossorigin="anonymous"></script>
</head>
<body>
<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
...
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Save changes</button>
</div>
</div>
</div>
</div>
<script>
$('#myModal').modal('show');
setTimeout(function() {
var isShown = $('#myModal').hasClass('show');
console.log(isShown);
}, 1000);
</script>
</body>
</html>这篇关于如何检查bootstrap-4模态是否已打开?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
