本文实例为大家分享了vue实现拖拽进度条的具体代码，供大家参考，具体内容如下
组件代码：
< template >
< div >
< div class = "slider" ref = "slider" >
< div class = "process" :style = "{ width }" ></ div >
< div class = "thunk" ref = "trunk" :style = "{ left }" >
< div class = "block" ></ div >
< div class = "tips" >
<!-- <span>{{scale*100}}</span> -->
< i class = "fas fa-caret-down" ></ i >
</ div >
</ div >
</ div >
< div >
< button
@click="
() => {
this.per++;
}
"
>
+</ button
>{{ per }}%< button
@click="
() => {
if (this.per > 0) {
this.per--;
}
}
"
>
-
</ button >
</ div >
</ div >
</ template >
< script >
/*
* min 进度条最小值
* max 进度条最大值
* v-model 对当前值进行双向绑定实时显示拖拽进度
* */
export default {
props: ["min", "max", "value"],
data() {
return {
slider: null, //滚动条DOM元素
thunk: null, //拖拽DOM元素
per: this.value, //当前值
};
},
//渲染到页面的时候
mounted() {
this.slider = this.$refs.slider;
this.thunk = this.$refs.trunk;
var _this = this;
this.thunk.onmousedown = function (e) {
var width = parseInt(_this.width);
var disX = e.clientX;
document.onmousemove = function (e) {
// value, left, width
// 当value变化的时候，会通过计算属性修改left，width
// 拖拽的时候获取的新width
var newWidth = e.clientX - disX + width;
// 拖拽的时候得到新的百分比
var scale = newWidth / _this.slider.offsetWidth;
_this.per = Math.ceil((_this.max - _this.min) * scale + _this.min);
_this.per = Math.max(_this.per, _this.min);
_this.per = Math.min(_this.per, _this.max);
_this.$emit("input", _this.per);
};
document.onmouseup = function () {
document.onmousemove = document.onmouseup = null;
};
return false;
};
},
computed: {
// 设置一个百分比，提供计算slider进度宽度和trunk的left值
// 对应公式为 当前值-最小值/最大值-最小值 = slider进度width / slider总width
// trunk left = slider进度width + trunk宽度/2
scale() {
return (this.per - this.min) / (this.max - this.min);
},
width() {
if (this.slider) {
return this.slider.offsetWidth * this.scale + "px";
} else {
return 0 + "px";
}
},
left() {
if (this.slider) {
return (
this.slider.offsetWidth * this.scale -
this.thunk.offsetWidth / 2 +
"px"
);
} else {
return 0 + "px";
}
},
},
};
</ script >
< style >
.box {
margin: 100px auto 0;
width: 80%;
}
.clear:after {
content: "";
display: block;
clear: both;
}
.slider {
user-select: none;
position: relative;
margin: 20px 0;
width: 400px;
height: 10px;
background: #e4e7ed;
border-radius: 5px;
cursor: pointer;
}
.slider .process {
position: absolute;
left: 0;
top: 0;
width: 112px;
height: 10px;
border-radius: 5px;
background: #81b159;
}
.slider .thunk {
position: absolute;
left: 100px;
top: -7px;
width: 20px;
height: 20px;
}
.slider .block {
width: 20px;
height: 20px;
border-radius: 50%;
border: 2px solid #409eff;
background: rgba(255, 255, 255, 1);
transition: 0.2s all;
}
.slider .tips {
position: absolute;
left: -7px;
bottom: 30px;
min-width: 15px;
text-align: center;
padding: 4px 8px;
/* background: #000; */
border-radius: 5px;
height: 24px;
color: #fff;
}
.slider .tips i {
position: absolute;
margin-left: -5px;
left: 50%;
bottom: -9px;
font-size: 16px;
color: #000;
}
.slider .block:hover {
transform: scale(1.1);
opacity: 0.6;
}
</ style >
调用：
< template >
< slider :min = "0" :max = "100" v-model = "per" ></ slider >
</ template >
< script >
import slider from "@/components/slider";
export default {
data() {
return {};
},
computed: {
per: {
get() {
return 0;
},
set(val) {
console.log(val);
},
},
},
components: { slider },
mounted() {},
methods: {},
};
</ script >
< style >
</ style >
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/weixin_46476460/article/details/114139706