分页导航（Pagination）
用于显示分页以指示跨多个页面存在一系列相关内容的文档和示例。
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概述
我们使用一大块连接的链接进行分页，使得链接很难丢失，并且很容易扩展，同时提供了较大的命中区域。分页是用列表HTML元素构建的，因此屏幕阅读器可以宣布可用链接的数量。使用包装nav元素将其标识为用于屏幕阅读器和其他辅助技术的导航部分。
此外，由于页面可能有多个这样的导航部分，建议为
<nav aria-label="Page navigation example">
<ul class="pagination">
<li class="page-item"><a class="page-link" href="#">Previous</a></li>
<li class="page-item"><a class="page-link" href="#">1</a></li>
<li class="page-item"><a class="page-link" href="#">2</a></li>
<li class="page-item"><a class="page-link" href="#">3</a></li>
<li class="page-item"><a class="page-link" href="#">Next</a></li>
</ul>
</nav>使用图标
要使用图标或符号来代替某些分页链接的文本吗？确保使用aria属性提供适当的屏幕阅读器支持。
<nav aria-label="Page navigation example">
<ul class="pagination">
<li class="page-item">
<a class="page-link" href="#" aria-label="Previous">
<span aria-hidden="true">«</span>
</a>
</li>
<li class="page-item"><a class="page-link" href="#">1</a></li>
<li class="page-item"><a class="page-link" href="#">2</a></li>
<li class="page-item"><a class="page-link" href="#">3</a></li>
<li class="page-item">
<a class="page-link" href="#" aria-label="Next">
<span aria-hidden="true">»</span>
</a>
</li>
</ul>
</nav>禁用和活动状态
分页链接可根据不同情况进行自定义。对于显示为不可单击的链接使用.disabled，对于显示为当前页的链接使用.active。
虽然.disabled类使用pointer-events: none来尝试禁用a的链接功能，但是CSS属性还没有标准化，并且不考虑键盘导航。因此，您应该始终在禁用的链接上添加tabindex="-1"，并使用自定义JavaScript完全禁用其功能。
<nav aria-label="...">
<ul class="pagination">
<li class="page-item disabled">
<a class="page-link" href="#" tabindex="-1" aria-disabled="true">Previous</a>
</li>
<li class="page-item"><a class="page-link" href="#">1</a></li>
<li class="page-item active" aria-current="page">
<a class="page-link" href="#">2</a>
</li>
<li class="page-item"><a class="page-link" href="#">3</a></li>
<li class="page-item">
<a class="page-link" href="#">Next</a>
</li>
</ul>
</nav>您可以选择调出span的活动或禁用的锚定，或者在上一个/下一个箭头的情况下忽略锚定，以删除单击功能并防止键盘聚焦，同时保留所需的样式。
<nav aria-label="...">
<ul class="pagination">
<li class="page-item disabled">
<span class="page-link">Previous</span>
</li>
<li class="page-item"><a class="page-link" href="#">1</a></li>
<li class="page-item active" aria-current="page">
<span class="page-link">2</span>
</li>
<li class="page-item"><a class="page-link" href="#">3</a></li>
<li class="page-item">
<a class="page-link" href="#">Next</a>
</li>
</ul>
</nav>大小
喜欢更大或更小的分页？加上.pagination-lg 或者 .pagination-sm，或使用其他尺寸。
<nav aria-label="...">
<ul class="pagination pagination-lg">
<li class="page-item active" aria-current="page">
<span class="page-link">1</span>
</li>
<li class="page-item"><a class="page-link" href="#">2</a></li>
<li class="page-item"><a class="page-link" href="#">3</a></li>
</ul>
</nav><nav aria-label="...">
<ul class="pagination pagination-sm">
<li class="page-item active" aria-current="page">
<span class="page-link">1</span>
</li>
<li class="page-item"><a class="page-link" href="#">2</a></li>
<li class="page-item"><a class="page-link" href="#">3</a></li>
</ul>
</nav>对齐
使用flexbox实用程序更改分页组件的对齐方式。
<nav aria-label="Page navigation example">
<ul class="pagination justify-content-center">
<li class="page-item disabled">
<a class="page-link" href="#" tabindex="-1" aria-disabled="true">Previous</a>
</li>
<li class="page-item"><a class="page-link" href="#">1</a></li>
<li class="page-item"><a class="page-link" href="#">2</a></li>
<li class="page-item"><a class="page-link" href="#">3</a></li>
<li class="page-item">
<a class="page-link" href="#">Next</a>
</li>
</ul>
</nav><nav aria-label="Page navigation example">
<ul class="pagination justify-content-end">
<li class="page-item disabled">
<a class="page-link" href="#" tabindex="-1" aria-disabled="true">Previous</a>
</li>
<li class="page-item"><a class="page-link" href="#">1</a></li>
<li class="page-item"><a class="page-link" href="#">2</a></li>
<li class="page-item"><a class="page-link" href="#">3</a></li>
<li class="page-item">
<a class="page-link" href="#">Next</a>
</li>
</ul>
</nav>Sass
Variables
$pagination-padding-y: .375rem;
$pagination-padding-x: .75rem;
$pagination-padding-y-sm: .25rem;
$pagination-padding-x-sm: .5rem;
$pagination-padding-y-lg: .75rem;
$pagination-padding-x-lg: 1.5rem;
$pagination-color: $link-color;
$pagination-bg: $white;
$pagination-border-width: $border-width;
$pagination-border-radius: $border-radius;
$pagination-margin-start: -$pagination-border-width;
$pagination-border-color: $gray-300;
$pagination-focus-color: $link-hover-color;
$pagination-focus-bg: $gray-200;
$pagination-focus-box-shadow: $input-btn-focus-box-shadow;
$pagination-focus-outline: 0;
$pagination-hover-color: $link-hover-color;
$pagination-hover-bg: $gray-200;
$pagination-hover-border-color: $gray-300;
$pagination-active-color: $component-active-color;
$pagination-active-bg: $component-active-bg;
$pagination-active-border-color: $pagination-active-bg;
$pagination-disabled-color: $gray-600;
$pagination-disabled-bg: $white;
$pagination-disabled-border-color: $gray-300;
$pagination-transition: color .15s ease-in-out, background-color .15s ease-in-out, border-color .15s ease-in-out, box-shadow .15s ease-in-out;
$pagination-border-radius-sm: $border-radius-sm;
$pagination-border-radius-lg: $border-radius-lg;
Mixins
@mixin pagination-size($padding-y, $padding-x, $font-size, $border-radius) {
.page-link {
padding: $padding-y $padding-x;
@include font-size($font-size);
}
.page-item {
@if $pagination-margin-start == (-$pagination-border-width) {
&:first-child {
.page-link {
@include border-start-radius($border-radius);
}
}
&:last-child {
.page-link {
@include border-end-radius($border-radius);
}
}
} @else {
//Add border-radius to all pageLinks in case they have left margin
.page-link {
@include border-radius($border-radius);
}
}
}
}