Question

我正在尝试在悬停菜单项时使用background-color进行过渡效果，但它不起作用。这是我的CSS代码：

#content #nav a:hover {
    color: black;
    background-color: #AD310B;
    /* Firefox */
    -moz-transition: all 1s ease-in;
    /* WebKit */
    -webkit-transition: all 1s ease-in;
    /* Opera */
    -o-transition: all 1s ease-in;
    /* Standard */
    transition: all 1s ease-in;
}

#nav div是一个菜单ul项目列表。

Answer 1

据我所知，转换目前适用于Safari，Chrome，Firefox，Opera和Internet Explorer 10 +。

这会在这些浏览器中为您产生淡入淡出效果：

a {
    background-color: #FF0;
}

a:hover {
    background-color: #AD310B;
    -webkit-transition: background-color 1000ms linear;
    -ms-transition: background-color 1000ms linear;
    transition: background-color 1000ms linear;
}

<a>Navigation Link</a>

注意：正如Gerald在评论中指出的那样，如果您将转换放在a上，而不是放在a:hover上，它将会淡化为原始颜色当你的鼠标离开链接时。

这也可能派上用场：CSS Fundamentals: CSS 3 Transitions

Answer 2

对我来说，最好将转换代码与原始/最小选择器放在一起，而不是使用：hover或任何其他其他选择器：

＆＃13;

#content #nav a {
    background-color: #FF0;
    
    -webkit-transition: background-color 1000ms linear;
    -moz-transition: background-color 1000ms linear;
    -o-transition: background-color 1000ms linear;
    -ms-transition: background-color 1000ms linear;
    transition: background-color 1000ms linear;
}

#content #nav a:hover {
    background-color: #AD310B;
}

＆＃13;

<div id="content">
    <div id="nav">
        <a href="#link1">Link 1</a>
    </div>
</div>

＆＃13;

Answer 3

另一种实现此目的的方法是使用animation，它提供了更多控制权。

#content #nav a {
    background-color: #FF0;
    
    /* only animation-duration here is required, rest are optional (also animation-name but it will be set on hover)*/
    animation-duration: 1s; /* same as transition duration */
    animation-timing-function: linear; /* kind of same as transition timing */
    animation-delay: 0ms; /* same as transition delay */
    animation-iteration-count: 1; /* set to 2 to make it run twice, or Infinite to run forever!*/
    animation-direction: normal; /* can be set to "alternate" to run animation, then run it backwards.*/
    animation-fill-mode: none; /* can be used to retain keyframe styling after animation, with "forwards" */
    animation-play-state: running; /* can be set dynamically to pause mid animation*/
    
    /* declaring the states of the animation to transition through */
    /* optionally add other properties that will change here, or new states (50% etc) */
    @keyframes onHoverAnimation {
    0% {
      background-color: #FF0;  
    }
    100% {
      background-color: #AD310B;
    }
  }
}

#content #nav a:hover {
    /* animation wont run unless the element is given the name of the animation. This is set on hover */
    animation-name: onHoverAnimation;
}

背景色的过渡

3 个答案: