如何从左到右逐渐改变元素的背景颜色[重复]

Question

我正在尝试使用关键帧来更改 a 标签的背景颜色

我的代码：

.button-container {
  width: 200px;
  height: 40px;
  display: flex;
  margin: 0 auto;

}
.button-container a{
  width: inherit;
  height: inherit;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: linear-gradient(to right, #000, #000);
}

.button-container:hover a{
  animation: colorswitch 5s linear;
}

@keyframes colorswitch {
  from { 
    background-image: linear-gradient(to right, #ddd , #ddd);
  }
  to { 
    background-image: linear-gradient(to right, #ddd , #ddd);
  }
}

 <div class="button-container">
   <a href="#">View here</a>
 </div>

如何将 a 标签的背景颜色从 #000 更改为 #ddd 当我将鼠标悬停在它上面时从左向右移动？

Answer 1

这是一个使用线性渐变、背景位置和 css 过渡的图案。

从右到左：

button {
  background-image: linear-gradient(to right, red 40%,  blue 60%);
    
 background-size: 300% 100%;
  transition: background-position .5s;
  background-position: 0;
  
  border: none;
  padding: 1em;
}


button:hover {
   background-position: 100%;
}

<button>A button</button>

从左到右：

button {
  background-image: linear-gradient(to right, red 40%,  blue 60%);
    
 background-size: 300% 100%;
  transition: background-position .5s;
  background-position: 100%;
  
  border: none;
  padding: 1em;
}


button:hover {
   background-position: 0%;
}

<button> A button</button>