简述：我们在写大屏项目和vue项目时经常会用到echarts，用于数据统计和可视化，它是一款基于JavaScript的数据可视化图表库，提供直观，生动，可交互，可个性化定制的数据可视化图表，下面分享下它在项目中的使用方式；
1、安装，下载相关依赖（可用镜像cnpm）；
npm install echarts --save
下载较慢时，可以使用镜像cnpm
cnpm install echarts --save2、在项目中引入（全局引入）；
全局引入Echarts
import * as echarts from "echarts";
然后挂载在vue原型上
Vue.prototype.$echarts = echarts; 可按需引入 >>
Echarts按需引入详细https://echarts.apache.org/handbook/zh/basics/import/
https://echarts.apache.org/handbook/zh/basics/import/
3、在vue页面中使用；
3.1、首先定义一个容器，设置宽高，也就是echarts的大小（这一步很重要，一定要设置容器大小，不然显然不出来）
定义一个容器
<template>
<div id="echarts_demo"></div>
</template>
并设置大小
<style lang="scss" scoped>
#echarts_demo {
width: 80%;
height: 80vh;
margin: auto;
border: 1px solid #8080ff;
}
</style>3.2、定义一个方法，在方法中获取容器实例，初始化echarts，并配置相关属性，然后在mounted函数中调用（注意这里调用时候使用的是this.$echarts.init，全局方法）；
methods: {
定义一个echarts方法，把代码粘贴进去（官网实例有提供代码）
defineEcharts() {
获取容器实例
var chartDom = document.getElementById("echarts_demo");
赋值并初始化ecahrts
var myChart = this.$echarts.init(chartDom);
配置相关属性
var option;
setTimeout(function () {
option = {
legend: {},
tooltip: {
trigger: "axis",
showContent: false,
},
dataset: {
source: [
["product", "2012", "2013", "2014", "2015", "2016", "2017"],
["Milk Tea", 56.5, 82.1, 88.7, 70.1, 53.4, 85.1],
["Matcha Latte", 51.1, 51.4, 55.1, 53.3, 73.8, 68.7],
["Cheese Cocoa", 40.1, 62.2, 69.5, 36.4, 45.2, 32.5],
["Walnut Brownie", 25.2, 37.1, 41.2, 18, 33.9, 49.1],
],
},
xAxis: { type: "category" },
yAxis: { gridIndex: 0 },
grid: { top: "55%" },
series: [
{
type: "line",
smooth: true,
seriesLayoutBy: "row",
emphasis: { focus: "series" },
},
{
type: "line",
smooth: true,
seriesLayoutBy: "row",
emphasis: { focus: "series" },
},
{
type: "line",
smooth: true,
seriesLayoutBy: "row",
emphasis: { focus: "series" },
},
{
type: "line",
smooth: true,
seriesLayoutBy: "row",
emphasis: { focus: "series" },
},
{
type: "pie",
id: "pie",
radius: "30%",
center: ["50%", "25%"],
emphasis: {
focus: "self",
},
label: {
formatter: "{b}: {@2012} ({d}%)",
},
encode: {
itemName: "product",
value: "2012",
tooltip: "2012",
},
},
],
};
myChart.on("updateAxisPointer", function (event) {
const xAxisInfo = event.axesInfo[0];
if (xAxisInfo) {
const dimension = xAxisInfo.value + 1;
myChart.setOption({
series: {
id: "pie",
label: {
formatter: "{b}: {@[" + dimension + "]} ({d}%)",
},
encode: {
value: dimension,
tooltip: dimension,
},
},
});
}
});
myChart.setOption(option);
});
option && myChart.setOption(option);
// 给window添加resize监听事件，当平怒尺寸发生变化时重置
window.addEventListener("resize", () => {
myChart.resize();
});
},
},
mounted() {
this.defineEcharts();
},4、实现的效果；
5、这里给echarts加上页面重置效果，就是当页面尺寸发生变化的时候，跟随页面大小变化而变化（也就是加一个监听事件resize，上面代码有提到）；
option && myChart.setOption(option);
// 给window添加resize监听事件，当屏幕尺寸发生变化时重置
window.addEventListener("resize", () => {
myChart.resize();
});加监听事件之前：
加监听事件之后：
更多，Echarts大小重置，缩小等问题 >>
echarts重置、缩小等问题，解决方案https://blog.csdn.net/weixin_65793170/article/details/127608700?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522167984448316800180676689%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fblog.%2522%257D&request_id=167984448316800180676689&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~blog~first_rank_ecpm_v1~rank_v31_ecpm-1-127608700-null-null.blog_rank_default&utm_term=echarts&spm=1018.2226.3001.4450https://blog.csdn.net/weixin_65793170/article/details/127608700?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522167984448316800180676689%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fblog.%2522%257D&request_id=167984448316800180676689&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~blog~first_rank_ecpm_v1~rank_v31_ecpm-1-127608700-null-null.blog_rank_default&utm_term=echarts&spm=1018.2226.3001.4450
更多操作 >>
Echarts官网https://echarts.apache.org/zh/index.htmlhttps://echarts.apache.org/zh/index.html
相关镜像（Echarts访问加速） >>
PPCharthttp://ppchart.com/#/
