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Sass：根据@media设置$ vars

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  • This is my first dabble into Sass mixins and includes.

我希望根据当前屏幕宽度改变一些列宽，我希望DRY方法是根据匹配（当前）@media选择设置一些全局Sass变量 .

我似乎错误地认为变量将在匹配的@media语句改变时重新评估 - 例如设备旋转 . 不 .

我想最终得到一组类（在@media部分之外），它们使用@media选择的适当值， rather than 必须在每个单独的@media部分重述类，例如：

th.employee-name {
   width: $column_employee_name;
}

我看到的是@mixin被调用所有媒体宽度，并且最后一次调用它确定变量的最终值 .

Question: Is there a way of achieving what I am trying to do - ie a DRY solution?

@mixin column-definitions($app) {
    @if $app == "mobile" {
        $column_employee_name  : 130px !global;
        $column_business_role  : 135px !global;
        $column_company        : 020px !global;
        $column_company_heading: 'Tel' !global;
        $column_dept           : 075px !global;
        $column_extension      : 085px !global;
        $column_personal       : 150px !global;
        $column_nextofkin      : 150px !global;
        $table_width           : $column_business_role + $column_company + $column_employee_name !global;
    }
    @else {
        $column_employee_name  : 200px !global;
        $column_business_role  : 250px !global;
        $column_company        : 150px !global;
        $column_company_heading: 'S & B Mobile' !global;
        $column_dept           : 075px !global;
        $column_extension      : 085px !global;
        $column_personal       : 150px !global;
        $column_nextofkin      : 150px !global;
        $table_width           : $column_business_role + $column_company + $column_dept + $column_extension + $column_employee_name + $column_personal + $column_nextofkin + 20px !global;
    }
}

@media only screen and (max-width: 420px) {
    $app : mobile !global;
    @include column-definitions($app);
    // a.mobile-number { //     display: none; // }
}

@media only screen and (min-width:421px) {
    $app : pc !global;
    @include column-definitions($app);
    // a.mobile-icon { //     display: none; // }
}
sass

1 回答

  • 1

    我已经想出如何保持这种干燥 . 在下面的示例中，根据更改的屏幕宽度可变宽度的和类在 @mixin column-definitions 中列出一次

    有两个 @media queries ，首先设置每个变量所需的变量，然后 @include column-definitions

    顺便说一句 - 我已经使用了全局变量用于不会相应改变其宽度的列 .

    Simples！

    $column_dept           : 075px !global;
$column_extension      : 085px !global;
$column_personal       : 150px !global;
$column_nextofkin      : 150px !global;

@mixin column-definitions($column_employee_name, $column_business_role, $column_company, $column_company_heading) {

    th.employee-name,
    td.employee-name {
        width    : $column_employee_name;
        max-width: $column_employee_name;
        min-width: $column_employee_name;
    }

    td.business-role,
    th.business-role {
        max-width: $column_business_role;
        min-width: $column_business_role;
    }

    td.company-mobile,
    th.company-mobile {
        max-width: $column_company;
        min-width: $column_company;
    }

    th.company-mobile::before {
        content: $column_company_heading;
    }
}

@media only screen and (max-width: 420px) {

    $column_employee_name  : 130px !global;
    $column_business_role  : 135px !global;
    $column_company        : 020px !global;
    $column_company_heading: 'Tel' !global;

    @include column-definitions($column_employee_name, $column_business_role, $column_company, $column_company_heading);

    $table_width           : $column_business_role + $column_company + $column_employee_name !global;

    a.mobile-number { display: none;  }
}

@media only screen and (min-width:421px) {

    $column_employee_name  : 200px !global;
    $column_business_role  : 250px !global;
    $column_company        : 150px !global;
    $column_company_heading: 'S & B Mobile' !global;

    @include column-definitions($column_employee_name, $column_business_role, $column_company, $column_company_heading);

    $table_width           : $column_business_role + $column_company + $column_dept + $column_extension + $column_employee_name + $column_personal + $column_nextofkin + 20px !global;

    a.mobile-icon {   display: none; }
}
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