如何在<div>中调整背景图像的亮度而又不影响前景项目？

时间：2018-09-02 17:29:08

标签： html css background hover brightness

让我作为序言，我是HTML和CSS的入门者。话虽如此，我在网站的某个部分使用了JS小提琴：https://jsfiddle.net/rharrison2641/sb3rzm9t/2/

代码。）

HTML：

<section class="FutureGoals">

  <div class="BlizzBox">

    <div class="Blizzard1">

      <img alt="BlizzPop" src="https://s8.postimg.cc/5avnnvurp/Blizz_Pop.png" class="BlizzPop">

    </div>

  </div>

</section>

CSS：

.FutureGoals {
  height: 100vh;
  overflow: hidden;
}

.BlizzBox {
  height: 100vh;
  overflow: hidden;
}

.Blizzard1 {
  background: url(https://s8.postimg.cc/g96x696k3/Blizzard.jpg);
  background-repeat: no-repeat;
  background-position: 75%;
  background-attachment: fixed;
  height: 100%;
  width: 100%;
  transition: all .5s ease;
  -moz-transition: all .5s ease;
  -ms-transition: all .5s ease;
  -webkit-transition: all .5s ease;
  -o-transition: all .5s ease;
  webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

.Blizzard1:hover {
  -webkit-filter: brightness(50%);
  -moz-transform: scale(1.1);
  -webkit-transform: scale(1.1);
  -o-transform: scale(1.1);
  -ms-transform: scale(1.1);
  transform: scale(1.1);
  -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand')";
  filter: progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand');
}

.BlizzPop {
  position: relative;
  height: auto;
  width: 30%;
  left: 25%;
  top: 9%;
  z-index: 1;
  transition: all .7s ease;
  -moz-transition: all .7s ease;
  -ms-transition: all .7s ease;
  -webkit-transition: all .7s ease;
  -o-transition: all .7s ease;
}

.Blizzard1:hover .BlizzPop {
  z-index: 1;
  -moz-transform: scale(1.5);
  -webkit-transform: scale(1.5);
  -o-transform: scale(1.5);
  -ms-transform: scale(1.5);
  transform: scale(1.5);
  -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand')";
  filter: progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand');
}

基本上，我想做的是使背景图像Blizzard.jpg变暗，但使Blizzard.png徽标不变暗并保持其白色。就目前而言，一切正常，但徽标变暗为淡灰色。我试过将图像与背景图像放置在div之外，但这只会导致窗口大小调整极大地扭曲。有人可以为此提出建议吗？我已经尝试了几天，所以任何解决方案或帮助将不胜感激。

1 个答案:

答案 0 :(得分：0)

您可以在rgba()上悬停background-image渐变以使其变暗。

background: 
     linear-gradient(0deg, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),/* the gradient on top, adjust color and opacity to your taste */
      url(https://s8.postimg.cc/g96x696k3/Blizzard.jpg);

下面的演示

.FutureGoals {
  height: 100vh;
  overflow: hidden;
}

.BlizzBox {
  height: 100vh;
  overflow: hidden;
}

.Blizzard1 {
  background: url(https://s8.postimg.cc/g96x696k3/Blizzard.jpg);
  background-repeat: no-repeat;
  background-position: 75%;
  background-attachment: fixed;
  height: 100%;
  width: 100%;
  transition: all .5s ease;
  -moz-transition: all .5s ease;
  -ms-transition: all .5s ease;
  -webkit-transition: all .5s ease;
  -o-transition: all .5s ease;
  webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

.Blizzard1:hover {
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url(https://s8.postimg.cc/g96x696k3/Blizzard.jpg);
  background-repeat: no-repeat;
  background-position: 75%;
  background-attachment: fixed;
  webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  -moz-transform: scale(1.1);
  -webkit-transform: scale(1.1);
  -o-transform: scale(1.1);
  -ms-transform: scale(1.1);
  transform: scale(1.1);
  -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand')";
  filter: progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand');
}

.BlizzPop {
  position: relative;
  height: auto;
  width: 30%;
  left: 25%;
  top: 9%;
  z-index: 1;
  transition: all .7s ease;
  -moz-transition: all .7s ease;
  -ms-transition: all .7s ease;
  -webkit-transition: all .7s ease;
  -o-transition: all .7s ease;
}

.Blizzard1:hover .BlizzPop {
  z-index: 1;
  -moz-transform: scale(1.5);
  -webkit-transform: scale(1.5);
  -o-transform: scale(1.5);
  -ms-transform: scale(1.5);
  transform: scale(1.5);
  -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand')";
  filter: progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand');
}
<section class="FutureGoals">
  <div class="BlizzBox">
    <div class="Blizzard1">
      <img alt="BlizzPop" src="https://s8.postimg.cc/5avnnvurp/Blizz_Pop.png" class="BlizzPop">
    </div>
  </div>
</section>

https://jsfiddle.net/sb3rzm9t/8/

或设置inset box-shadow并使用rgba()颜色 （对盒影过渡也很有效） < / p> 

box-shadow:inset 0 0 0 150vw rgba(0,0,0,0.5);/* hudge without blur to cover the whole container */

下面的演示

.FutureGoals {
  height: 100vh;
  overflow: hidden;
}

.BlizzBox {
  height: 100vh;
  overflow: hidden;
}

.Blizzard1 {
  background: url(https://s8.postimg.cc/g96x696k3/Blizzard.jpg);
  background-repeat: no-repeat;
  background-position: 75%;
  background-attachment: fixed;
  height: 100%;
  width: 100%;
  transition: all .5s ease;
  -moz-transition: all .5s ease;
  -ms-transition: all .5s ease;
  -webkit-transition: all .5s ease;
  -o-transition: all .5s ease;
  webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

.Blizzard1:hover {
box-shadow:inset 0 0 0 150vw rgba(0,0,0,0.5);
  -moz-transform: scale(1.1);
  -webkit-transform: scale(1.1);
  -o-transform: scale(1.1);
  -ms-transform: scale(1.1);
  transform: scale(1.1);
  -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand')";
  filter: progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand');
}

.BlizzPop {
  position: relative;
  height: auto;
  width: 30%;
  left: 25%;
  top: 9%;
  z-index: 1;
  transition: all .7s ease;
  -moz-transition: all .7s ease;
  -ms-transition: all .7s ease;
  -webkit-transition: all .7s ease;
  -o-transition: all .7s ease;
}

.Blizzard1:hover .BlizzPop {
  z-index: 1;
  -moz-transform: scale(1.5);
  -webkit-transform: scale(1.5);
  -o-transform: scale(1.5);
  -ms-transform: scale(1.5);
  transform: scale(1.5);
  -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand')";
  filter: progid:DXImageTransform.Microsoft.Matrix(M11=1.5, M12=0, M21=0, M22=1.5, SizingMethod='auto expand');
}
<section class="FutureGoals">
  <div class="BlizzBox">
    <div class="Blizzard1">
      <img alt="BlizzPop" src="https://s8.postimg.cc/5avnnvurp/Blizz_Pop.png" class="BlizzPop">
    </div>
  </div>
</section>

https://jsfiddle.net/sb3rzm9t/9/

相关问题
最新问题