我的vue组件是这样的:
DECLARE @SampleData AS TABLE ( B_VOL int)
INSERT INTO @SampleData VALUES (50), (50), ( 50), (50) ,(155), (255)
;WITH temp AS
(
SELECT sd.*, row_number() OVER(ORDER BY (SELECT null)) - 1 AS RowIndex FROM @SampleData sd
)
,cte AS
(
SELECT TOP 1 t.RowIndex, CAST( t.B_VOL AS decimal(18,7)) AS sv FROM temp t ORDER BY t.RowIndex ASC
UNION ALL
SELECT t.RowIndex, CAST(cte.sv * (CASE WHEN t.RowIndex % 2 = 1 THEN CAST(1 AS decimal(18,7))/t.B_VOL ELSE t.B_VOL END) AS decimal(18,7)) AS sv
FROM cte
INNER JOIN temp t ON cte.RowIndex + 1 = t.RowIndex
)
SELECT t.*, c.sv
FROM temp t
INNER JOIN cte c ON t.RowIndex = c.RowIndex
OPTION(MAXRECURSION 0)
点击链接后,它会调用网址,我想在重新加载页面后在点击的链接上添加活动类。
但是,我仍然感到困惑,我怎么能这样做?
答案 0 :(得分:2)
您可以添加计算属性,例如currentPath
:
computed: {
currentPath () {
// grab current url and return the part after `baseUrl `
// e.g. '/message/inbox' or '/message/review'
return '/message/inbox'
}
}
一个适合你特殊风格的CSS课程:
.active-item {
/* key-value pairs here */
}
然后在您的模板中,您可以将该类应用于匹配的项目:
<a :href="baseUrl+'/message/inbox'"
:class="{ 'active-item': currentPath === '/message/inbox'}">
class="list-group-item">Message</a>
<a :href="baseUrl+'/message/review'"
:class="{ 'active-item': currentPath === '/message/review'}">
class="list-group-item">Review</a>
上的文档
答案 1 :(得分:1)
根据Leo的回答,引入一个自动检测的组件是否有效是一个好主意,因此您不需要编写一堆<a>
元素和许多重复属性。
例如<custom-link>
组件:
<custom-link href="/message/inbox" class="list-group-item">
Message
</custom-link>
<custom-link href="/message/review" class="list-group-item">
Review
</custom-link>
<custom-link href="/message/resolution" class="list-group-item">
Resolution
</custom-link>
如果您不需要在其他组件中重用此组件,或者始终需要list-group-item
类,您也可以将此类封装到<custom-link>
。它看起来更干净:
<custom-link href="/message/inbox">Message</custom-link>
<custom-link href="/message/review">Review</custom-link>
<custom-link href="/message/resolution">Resolution</custom-link>
custom-link
的代码如下:
<a
:href="baseUrl + href"
:class="{ active: isActive }"
class="list-group-item"
>
<slot></slot>
</a>
{
props: ['href'],
data: () => ({ baseUrl: window.Laravel.baseUrl }),
computed: {
isActive () {
return location.href === this.baseUrl + this.href
}
}
}
我直接在这里使用location.href
,如果你需要一些计算来获取当前的URL,你也可以使用像Leo这样的计算属性。