如果你不想要按钮的轮廓和所有的状态，你可以用下面的代码覆盖css

.btn.active.focus, .btn.active:focus, 
.btn.focus, .btn:active.focus, 
.btn:active:focus, .btn:focus{
  outline: none;
}

.btn:focus:active {
  outline: none;
}

这将在点击时删除轮廓，但在点击时保持焦点(对于a11y)

对于解决方案中使用的AngularJS开发人员:

var element = $window.document.getElementById("export-button");
    if (element){
        element.blur();
    }

记住注入$window。

I found the same situation using a submit button in a form using a bootstrap (v4.4.1) class. The problem arose as I was building a single-page user interface using JavaScript to manipulate all the required changes to the DOM. The form data was submitted to the server via 'fetch' using a JSON string rather than a HTTP POST request. Note that usually the form's default behaviour is to reload the document, and normally this would refresh the button, however the form's default behaviour was prevented by using e.preventDefault() in the listener function for the form's submit event (it is a single-page UI so the document is never reloaded and traffic to the server is minimised to data only). Given the document was not reloaded the button appeared to stay depressed until the user clicked elsewhere in the window. This is what I had (with the problem):

<输入类型=“submit”类=“btn btn-primary”>

这是我用来解决按钮一直按下的问题:

<input type=“submit” class=“btn btn-primary” onmouseup=“this.blur（）”>

如果button:focus {box-shadow: none}不适合你，可能会有一些库添加边界，就像我的例子中使用的伪选择器::after。

所以我用以下解决方案删除了显示在焦点上的边界:

button:focus::after {
    outline: none;
    box-shadow: none;
}

虽然很容易删除所有焦点按钮的轮廓(如user1933897的答案)，但从可访问性的角度来看，这种解决方案是糟糕的(例如，参见停止破坏浏览器的默认焦点轮廓)。

另一方面，如果浏览器在你点击按钮后认为它是聚焦的，那么它可能不可能说服你停止将你点击的按钮样式设置为聚焦(我在看着你，OS X上的Chrome)。

那么，我们能做什么呢?我想到了几个选择。

1) Javascript (jQuery): $('.btn').mouseup(function() {this.blur()})

您正在指示浏览器在单击按钮后立即删除任何按钮周围的焦点。通过使用mouseup而不是点击，我们保持了基于键盘的交互的默认行为(mouseup不会被键盘触发)。

2) CSS: .btn:hover {outline: 0 !important}

在这里，您只关闭悬停按钮的轮廓。显然这不是理想的，但在某些情况下可能足够了。