我有一个 CSS,我尝试使用许多结构迁移到 SASS,例如
.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active,
.btn-primary.active,
.open .dropdown-toggle.btn-primary {
...
}
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有了这个:
.btn-primary {
...
&:hover,
&:focus,
&:active,
&.active,
.open .dropdown-toggle#{&} {
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我显然得到:
.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active,
.btn-primary.active,
.btn-primary .open .dropdown-toggle.btn-primary {
...
}
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但我似乎不允许使用@at-root:
.btn-primary {
...
&:hover,
&:focus,
&:active,
&.active,
@at-root .open .dropdown-toggle#{&} {
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因为 SASS 在逗号之后需要一个选择器并得到一个 @...
我在MS Access中有如下查询
SELECT tblUsers.Forename, tblUsers.Surname,
(SELECT COUNT(ID)
FROM tblGrades
WHERE UserID = tblUsers.UserID
AND (Grade = 'A' OR Grade = 'B' OR Grade = 'C')) AS TotalGrades
FROM tblUsers
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我把它放到报告中,现在当试图查看报告时,它会显示一条警告" 子查询中不允许使用多级GROUP BY子句 "
我没有得到的是我在查询中甚至没有任何GROUP BY子句,为什么它会返回此错误?
我有一张桌子,上面有细节。每当我单击人字形时,就会显示相应行的详细视图。就我而言,最好只打开一个详细视图。理想的结果是:每当我单击人字形时,就会打开该详细视图,而所有其他视图都将关闭。
在buefy中,详细视图的打开是这样编写的:
<td v-if="detailed">
<a role="button" @click.stop="toggleDetails(row)">
<b-icon
icon="chevron-right"
both
:class="{'is-expanded': isVisibleDetailRow(row)}"/>
</a>
</td>
...
props: {
...
detailed: Boolean
...
}
...
methods: {
...
toggleDetails(obj) {
const found = this.isVisibleDetailRow(obj)
if (found) {
this.closeDetailRow(obj)
this.$emit('details-close', obj)
} else {
this.openDetailRow(obj)
this.$emit('details-open', obj)
}
// Syncs the detailed rows with the parent component
this.$emit('update:openedDetailed', this.visibleDetailRows)
},
openDetailRow(obj) {
const index = this.handleDetailKey(obj)
this.visibleDetailRows.push(index)
},
closeDetailRow(obj) {
const index = this.handleDetailKey(obj)
const i = this.visibleDetailRows.indexOf(index)
this.visibleDetailRows.splice(i, 1)
},
isVisibleDetailRow(obj) { …Run Code Online (Sandbox Code Playgroud)