试试这个，它和bootstrap的输入是一样的…

input:focus{
  color: #212529;
  background-color: #FFF;
  border-color: #86B7FE;
  outline: 0;
  box-shadow: 0 0 0 .25rem rgba(13, 110, 253, .25);
}

最后，我在bootstrap.css中修改了以下css条目

textarea:focus,
input[type="text"]:focus,
input[type="password"]:focus,
input[type="datetime"]:focus,
input[type="datetime-local"]:focus,
input[type="date"]:focus,
input[type="month"]:focus,
input[type="time"]:focus,
input[type="week"]:focus,
input[type="number"]:focus,
input[type="email"]:focus,
input[type="url"]:focus,
input[type="search"]:focus,
input[type="tel"]:focus,
input[type="color"]:focus,
.uneditable-input:focus {   
  border-color: rgba(126, 239, 104, 0.8);
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.075) inset, 0 0 8px rgba(126, 239, 104, 0.6);
  outline: 0 none;
}

这应该有助于去除它! 输入[type = text] { 边界:没有; ｝ 输入[type = text]:focus { 边界:没有; 不必:没有; ｝

你可以这样修改.form-control:focus颜色而不改变引导样式:

快速修复

.form-control:focus {
        border-color: #28a745;
        box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.25);
    } 

完整的解释

Find the bootstrapCDN version that you are using. E.g. for me right now is 4.3.1: https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.css Search for the class you want to modify. E.g. .form-control:focus and copy the parameters that you want to modify into your css. In this case is border-color and box-shadow. Choose a color for the border-color. In this case I choose to pick up the same green the bootstrap uses for their .btn-success class, by searching for that particular class in the bootstrap.css page mentioned in the step 1. Convert the color you have picked to RGB and add that to the box-shadow parameter without altering the fourth RGBA parameter (0.25) that bootstrap has for transparency.

这将工作100%使用这个:

.form-control, .form-control:focus{
   box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
   border: rgba(255, 255, 255, 0);
}

如果你想让Chrome显示平台默认的“黄色”轮廓，这里有一些改变。

textarea:focus, input[type="text"]:focus, input[type="password"]:focus, input[type="datetime"]:focus, input[type="datetime-local"]:focus, input[type="date"]:focus, input[type="month"]:focus, input[type="time"]:focus, input[type="week"]:focus, input[type="number"]:focus, input[type="email"]:focus, input[type="url"]:focus, input[type="search"]:focus, input[type="tel"]:focus, input[type="color"]:focus, .uneditable-    input:focus {
    border-color: none;
    box-shadow: none;
    -webkit-box-shadow: none;
    outline: -webkit-focus-ring-color auto 5px;
}