如果未提供颜色主题,如何定义颜色主题的后备值?如果您看下面的示例:
<div class="grid">
<div class="long-grid-item">
<button>Long</button>
</div>
<div class="short-grid-item">
<button>Short</button>
</div>
</div>
在未安装@import '~@angular/material/theming';
@mixin angularx-timeline-theme($theme) {
$primary: map-get($theme, primary);
$primary-color: mat-color($primary);
header {
//What if the $primary-color is not available?
background-color: $primary-color;
}
}
的情况下如何定义自定义$ primary-color(因此将找不到$ primary-color)。如果未安装~@angular/material/theming
,将完全呈现mixin的CSS吗?