Question

我遇到了一个问题。我一直在问候一个未定义的变量错误，但我不确定为什么。该代码旨在使鼠标悬停时使导航栏后面的指示器更多。有什么想法吗？

出现以下错误：

Error: Undefined Variable: "$i". on Line 93 of style.sass.

下面是SASS代码：

$menu-items: 5
$menu-items-loop-offset: $menu-items - 1
$width: (100/$menu-items) * 1%

.with-indicator
    @for $i from 1 through $menu-items-loop-offset
    .Nav-item:nth-child(#{$i}).is-active ~ .Nav-item:last-child:after
    left: ($width*$i)-$width
    .Nav-item:nth-child(#{$i}).is-active ~ .Nav-item:last-child:before
    left: ($width*$i)+($width/2)-$width



    @for $i from 1 through $menu-items-loop-offset
    .Nav-item:nth-child(#{$i}):hover ~ .Nav-item:last-child:after
    left: ($width*$i)-$width !important
    .Nav-item:nth-child(#{$i}):hover ~ .Nav-item:last-child:before
    left: ($width*$i)+($width/2)-$width !important


.Nav-item
    &:last-child
    &:hover, &.is-active
    &:before
    left: (100%-$width)+($width/2) !important
    &:after
    left: 100%-$width !important

预先感谢您的帮助。

Answer 1

在您问题的代码中，两个@for循环的主体为空：

您需要缩进@for循环中的规则，以便将其包含在循环中：

$menu-items: 5
$menu-items-loop-offset: $menu-items - 1
$width: (100/$menu-items) * 1%

.with-indicator
    @for $i from 1 through $menu-items-loop-offset
        .Nav-item:nth-child(#{$i}).is-active ~ .Nav-item:last-child:after
        left: ($width*$i)-$width
        .Nav-item:nth-child(#{$i}).is-active ~ .Nav-item:last-child:before
        left: ($width*$i)+($width/2)-$width



    @for $i from 1 through $menu-items-loop-offset
        .Nav-item:nth-child(#{$i}):hover ~ .Nav-item:last-child:after
        left: ($width*$i)-$width !important
        .Nav-item:nth-child(#{$i}):hover ~ .Nav-item:last-child:before
        left: ($width*$i)+($width/2)-$width !important


.Nav-item
    &:last-child
    &:hover, &.is-active
    &:before
    left: (100%-$width)+($width/2) !important
    &:after
    left: 100%-$width !important

$i变量仅在@for循环范围内可用。

Answer 2

您需要在@for部分中添加Tab或空格。代替

@for
your code

写这个

@for
   your code

SASS未定义变量问题

2 个答案: