这样效果最好

.btn-primary.focus, .btn-primary:focus {
-webkit-box-shadow: none!important;
box-shadow: none!important;
}

对于想要一个纯css方式的人来说:

:focus:not(:focus-visible) { outline: none }

这也可以为链接等工作，和奖金，它保持键盘的可访问性。最后，它被不支持焦点可见的浏览器忽略

我在另一个页面上找到了这个问题和回答，覆盖按钮焦点样式对我有用。这个问题可能是Chrome的MacOS特有的。

.btn:focus {
  outline: none;
  box-shadow: none;
}

请注意，这对可访问性有影响，除非你的按钮和输入有一个良好的一致的焦点状态，否则不建议这样做。根据下面的评论，有些用户不能使用鼠标。

这是工作，希望能帮到你

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

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（）”>

如果以上方法对你不起作用，试试下面的方法:

.btn:焦点{轮廓:无;框影:无;边框:2px实体 透明;}

正如user1933897所指出的，这可能是针对MacOS和Chrome的。