将线性渐变传递给 Sass mixin

Question

我想将整个线性渐变传递给我的 mixin。 我已经尝试了我能想到的任何方法，但它总是导致它出现“无”，它用白色覆盖了我的图像。

@mixin webp-backgroundGradient($imgpath, $type: '.jpg') {
    background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.8) 10%, white 80%), url('#{$imgpath}#{$type}');
}

Answer 1

似乎工作得很好，请参阅 codepen...

https://codepen.io/joshmoto/pen/GRNegrP

我猜可能是您的图像路径有问题？如果没有看到您的控制台源代码，很难判断。

我从你的 mixin 参数中删除了 $type: '.jpg' 并直接传递了图像 url。

@mixin webp-backgroundGradient($img) {
  background-size: cover;
  background-repeat: no-repeat;
  background-image: linear-gradient(
      to bottom,
      rgba(white, 0.5) 10%,
      rgba(white, 1) 90%
    ),
    url("#{$img}");
}

.image {
  height: 100vh;
  @include webp-backgroundGradient("https://i.imgur.com/UNV29z8.jpeg");
}

这是输出...

.image {
  height: 100vh;
  background-size: cover;
  background-repeat: no-repeat;
  background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.5) 10%, white 90%), url("https://i.imgur.com/UNV29z8.jpeg");
}

<link href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css" rel="stylesheet"/>

<div class="image"></div>

---

更新您的评论...

@mixin 传递背景图片 url 和可选的背景渐变叠加...

在此处查看 codepen 示例https://codepen.io/joshmoto/pen/JjbzOoj

@mixin bg_img_gradient($img,$gradient:false) {
  background-size: cover;
  background-repeat: no-repeat;
  @if $gradient != false {
    background-image: #{$gradient}, url("#{$img}");
  } @else {
    background-image: url("#{$img}");
  }
}

.image-1 {
  height: 100vh;
  width:50%;
  float: left;
  @include bg_img_gradient(
    "https://i.imgur.com/UNV29z8.jpeg"
  );
}

.image-2 {
  height: 100vh;
  width:50%;
  float: left;
  @include bg_img_gradient(
    "https://i.imgur.com/UNV29z8.jpeg",
    linear-gradient(
      to bottom,
      rgba(white, 0.5) 10%,
      rgba(white, 1) 90%
    )
  );
}

这里是css 输出...

.image-1 {
  height: 100vh;
  width: 50%;
  float: left;
  background-size: cover;
  background-repeat: no-repeat;
  background-image:url("https://i.imgur.com/UNV29z8.jpeg");
}

.image-2 {
  height: 100vh;
  width: 50%;
  float: left;
  background-size: cover;
  background-repeat: no-repeat;
  background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.5) 10%, white 90%), url("https://i.imgur.com/UNV29z8.jpeg");
}

<link href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css" rel="stylesheet"/>

<div class="image-1"></div>
<div class="image-2"></div>