vue 实现 广告悬浮效果,并防抖性能优化
作者:互联网
节流防抖参考link:https://blog.csdn.net/zuorishu/article/details/93630578
<template>
<img :src="aiUrl" class="ai-img" id="ai-img" />
</template>
<script>
export default {
data() {
return {
timer: null,
aiUrl: require("@/assets/img/home/ai.png")
};
},
mounted() {
// window.addEventListener("scroll", this.startMove, true);
window.addEventListener("scroll", this.debounce(this.startMove, 100), true);
},
destroyed() {
window.removeEventListener("scroll", this.startMove);
clearInterval(this.timer);
},
methods: {
debounce(fn, delay) {
var timeout = null; // 创建一个标记用来存放定时器的返回值
return function (e) {
// 每当用户输入的时候把前一个 setTimeout clear 掉
clearTimeout(timeout);
// 然后又创建一个新的 setTimeout, 这样就能保证interval 间隔内如果时间持续触发,就不会执行 fn 函数
timeout = setTimeout(() => {
fn.apply(this, arguments);
}, delay);
};
},
startMove() {
var oDiv = document.getElementById("ai-img");
var scrollTop = document.getElementById("popContainer").scrollTop;
const iTarget = parseInt(
(document.documentElement.clientHeight - oDiv.offsetHeight) / 2 +
scrollTop
);
clearInterval(this.timer);
this.timer = setInterval(function () {
var oDiv = document.getElementById("ai-img");
var speed = (iTarget - oDiv.offsetTop) / 5;
speed = speed > 0 ? Math.ceil(speed) : Math.floor(speed);
if (oDiv.offsetTop == iTarget) {
clearInterval(this.timer);
} else {
oDiv.style.top = oDiv.offsetTop + speed + "px";
}
}, 30);
}
}
};
</script>
<style lang="less">
.ai-img {
position: absolute;
bottom: 1.2rem;
width: 1.34rem;
z-index: 1000;
}
#contact-us-header {
.ai-img {
width: 1.34rem;
position: absolute;
bottom: 1rem;
}
}
@media screen and (max-width: 1200px) {
.ai-img {
width: 1.34rem;
position: absolute;
bottom: 2rem;
}
}
@media screen and (max-width: 979px) {
.ai-img {
width: 1.34rem;
position: absolute;
bottom: 2rem;
}
}
@media screen and (max-width: 768px) {
.ai-img {
width: 1.34rem;
position: absolute;
bottom: 1rem;
}
}
@media screen and (max-width: 690px) {
.ai-img {
display: none;
}
}
@media screen and (max-width: 480px) {
.ai-img {
display: none;
}
}
</style>
标签:防抖,vue,oDiv,img,悬浮,width,ai,rem,speed 来源: https://blog.csdn.net/qq_37167049/article/details/113766145