CSS3 Transform 向左平移

Question

我有标题要添加 CSS3 动画

我要变身

标题

至

[标题]

而且我希望方括号从单词的中心到它的边界具有动画效果。

有点像..

Ti[]tle

至

[标题]

with animation（当然我用的是:before :after来添加括号 opacity 0到1）

我的p风格：

p:before {
    content: "[";
    position: absolute;
    left: 50%; /*to add the bracket to the center of the word*/
    opacity: 0;
    transition: all 0.7s ease;
}

谢谢！

Answer 1

p {
    display: table;
    position: relative;
}

p:before,
p:after{
    position: absolute;
    opacity: 0;
    transition: all 0.7s ease;
}

p:before {
    content: "[";
    left: 50%;
}

p:after {
    content: "]";
    right: 50%;
}

p:hover:before {
    left: -5px;
    opacity: 1;
}

p:hover:after {
    right: -5px;
    opacity: 1;
}

<p>Title</p>

<p>A Longer Title</p>

Answer 2

这是您要找的吗？

用这个 html:

<div>
<a href="" class="link4">TESTING</a>
</div>

和这些 css 的：

div{
        padding: 18px 0 18px 0;
    display: inline-block;
    margin-right: 40px;
}
a {
    color: #999;
    display: inline-block;
    text-align: center;
    width: 200px;
    text-decoration: none;
}
a:before, a:after {
    display: inline-block;
    opacity: 0;
    -webkit-transition: -webkit-transform 0.3s, opacity 0.2s;
    -moz-transition: -moz-transform 0.3s, opacity 0.2s;
    transition: transform 0.3s, opacity 0.2s;
}

a:before {
    margin-right: 10px;
    content: '[';
    -webkit-transform: translate(20px, -1px);
    -moz-transform: translate(20px, -1px);
    transform: translate(20px, -1px);
    vertical-align: top;
}

a:after {
    margin-left: 10px;
    content: ']';
    -webkit-transform: translate(-20px, -1px);
    -moz-transform: translate(-20px, -1px);
    transform: translate(-20px, -1px);
}

a:hover:after {
    opacity: 1;
    -webkit-transform: translate(0px, -1px);
    -moz-transform: translate(0px, -1px);
    transform: translate(0px, -1px);
}
a:hover:before {
    opacity: 1;
    -webkit-transform: translate(0px, -1px);
    -moz-transform: translate(0px, -1px);
    transform: translate(0px, -1px);
}

你明白了JSFIDDLE

Answer 3

您可以使用帧动画来实现这一点。这样您就不必将元素（或其他任何东西）悬停在动画开始时。

参见：http://jsfiddle.net/Paf_Sebastien/j2cvagjf/

像这样设置 :before 和 :after :

h1:before {
    content: "[";
    position: absolute;
    display: block;
    top: 0;
    -webkit-animation: bracketleft 1s 1 forwards;
    animation: bracketleft 1s 1 forwards;
}

然后处理动画:

@-webkit-keyframes bracketleft {
  0%   { opacity: 0; left: 50%; }
  100% { opacity: 1; left:-10px; }
}
@-webkit-keyframes bracketright {
  0%   { opacity: 0; right: 50%; }
  100% { opacity: 1; right: -10px; }
}

CSS3 Transform 向左平移

CSS3 Transform Translate to the left

css

animation

translate-animation