<svg width="0" height="0">
<defs>
<filter id="goo">
<feGaussianBlur in="SourceGraphic" stdDeviation="10" result="blur" />
<feColorMatrix in="blur" mode="matrix" values="1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 19 -9" result="goo" />
<feComposite in="SourceGraphic" in2="goo" operator="atop" />
</filter>
</defs>
</svg>
<div class="target">
<div>
<i id="ball1" class="ball"></i>
<i id="ball2" ref="ball2" class="ball"></i>
</div>
</div>
<div class="menu">
<div class="menu-item" @click="updageMenuItem(0)">
首页
<span :class="{'menu-item-bg': menuActive == 0}">
<i class="iconfont"></i>
</span>
</div>
<div class="menu-item" @click="updageMenuItem(1)">
发现
<span :class="{'menu-item-bg': menuActive == 1}">
<i class="iconfont"></i>
</span>
</div>
<div class="menu-item" @click="updageMenuItem(2)">
消息
<span :class="{'menu-item-bg': menuActive == 2}">
<i class="iconfont"></i>
</span>
</div>
<div class="menu-item" @click="updageMenuItem(3)">
我的
<span :class="{'menu-item-bg': menuActive == 3}">
<i class="iconfont"></i>
</span>
</div>
</div>
<script>
updageMenuItem(index) {
this.menuActive = index;
let ball2 = this.$refs.ball2;
Array(4)
.fill(0)
.map((item, it) => {
ball2.classList.remove('active' + it);
});
setTimeout(()=>{
ball2.classList.add('active' + index);
},100)
}
</script>
<style lang="less" scoped>
.profile {
height: 100%;
background: #aaaa7f;
font-size: 14px;
.menu,
.target {
position: absolute;
bottom: 0;
width: 100%;
height: 50px;
left: 0;
}
.target > div {
filter: url('#goo');
}
.menu {
display: flex;
z-index: 5;
background: #fff;
.menu-item {
flex: 1;
color: #333;
display: flex;
justify-content: center;
align-items: flex-end;
padding-bottom: 10px;
position: relative;
span {
position: absolute;
height: 35px;
width: 35px;
background: #aaaa7f;
border-radius: 50%;
left: 0;
right: 0;
margin: auto;
top: 0;
opacity: 0;
display: flex;
align-items: center;
justify-content: center;
i {
color: #fff;
font-size: 20px;
}
&.menu-item-bg{
animation: menuItemBg .5s .2s forwards;
}
}
}
}
.ball {
width: calc(100% + 60px);
height: 50px;
border-radius: 0;
background-color: #fff;
position: absolute;
left: -30px;
margin: auto;
z-index: 1;
}
#ball2 {
left: 0;
top: 0px;
width: 50px;
height: 50px;
margin: auto;
border-radius: 50%;
&.active0 {
left: calc(((100% / 4) - 50px) / 2);
animation: ballUp .5s forwards;
}
&.active1 {
left: calc(((100% / 4) - 50px) / 2 + 100% / 4);
animation: ballUp .5s forwards;
}
&.active2 {
left: calc(((100% / 4) - 50px) / 2 + (100% / 4) * 2);
animation: ballUp .5s forwards;
}
&.active3 {
left: calc(((100% / 4) - 50px) / 2 + (100% / 4) * 3);
animation: ballUp .5s forwards;
}
}
}
@keyframes ballUp {
from {
top: 0;
}
to {
top: -25px;
}
}
@keyframes menuItemBg {
from {
top: 0;
opacity: 0;
}
to {
top: -15px;
opacity: 1;
}
}