组件打开后按钮蓝色边框

Question

今天我在 HTML 组件中的关闭按钮遇到了一个奇怪的问题。即当我打开组件（客户的详细信息按钮）时，开头的关闭按钮被蓝色边框包围。单击组件上的任意位置后，边框消失。 如下图所示的问题：

我试图在我的 CSS 类中设置选项，如大纲：无，但它没有带来理想的结果。此外，当我将复制相同的组件时：

<div class="modal-header">
  <button type="button" class="close" data-dismiss="modal" aria-label="Close"(click)="onClose()">
    <span aria-hidden="true">&times;</span>
  </button>
  <button type="button" class="close" aria-label="Close">
    <span aria-hidden="true">×</span>
  </button>
</div>

只有第一个关闭按钮有蓝色边框。

客户详细信息.coponent.html

<div class="modal-header">
  <button type="button" class="close" data-dismiss="modal" aria-label="Close"(click)="onClose()">
    <span aria-hidden="true">&times;</span>
  </button>
</div>

<h4 class="modal-title w-100 font-weight-bold">Customer details:</h4>

<div *ngIf="(this.customer$ | async) as customer; else loading">
  {{customer.name}}
</div>

<div *ngIf="(this.customer$ | async) as customer; else loading">
  {{customer.email}}
</div>

<div *ngIf="(this.customer$ | async) as customer; else loading">
  {{customer.phoneNumber}}
</div>


<ng-template #loading>
  Loading stuff in ngIf...
</ng-template>

我想要实现的只是在组件打开后不出现这个蓝色边框。我不确定这是否是我的浏览器的问题，但目前我正在使用谷歌浏览器。感谢您对我应该做些什么来达到理想效果的建议。

Answer 1

将 style="outline:none" 添加到您遇到问题的任何 div。

如果是按钮，你可以这样做

按钮：焦点 {outline:none;}

  <button type="button" style="outline:none" class="close" data-dismiss="modal" aria-label="Close"(click)="onClose()">
        <span aria-hidden="true">&times;</span>
   </button>

Answer 2

要解决这个问题，请使用下面的 css 来解决由于默认按钮焦点样式导致的蓝色边框线，请参考此链接 - What is the default style of the blue focus outline in Chrome?

CSS 来解决这个问题：

button:focus {
  outline: 0;
}

Answer 3

避免此类问题的一个好做法是重置 CSS：https://meyerweb.com/eric/tools/css/reset/

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
    display: block;
}
body {
    line-height: 1;
}
ol, ul {
    list-style: none;
}
blockquote, q {
    quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
    content: '';
    content: none;
}
table {
    border-collapse: collapse;
    border-spacing: 0;
}