webpack+react实现echarts可视化配置

2019-01-21 02:40:25来源：博客园阅读 ()

先上效果

开发环境要求

需要事先安装node及npm

前期准备

1.创建文件夹react-echarts-editor
2.在项目根目录(以下称根目录)下创建src目录
3.在项目根目录下创建dist目录
4.在src目录下创建app.js文件(该文件就来一个react-echarts版的hello world)

import React from 'react';
import ReactDOM from 'react-dom';
import ReactEcharts from "echarts-for-react";

class EchartsEditor extends React.Component{
    constructor(props) {
        super(props);
        this.state = {
            echartsOption:  {
                xAxis: {
                    type: 'category',
                    data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
                },
                yAxis: {
                    type: 'value'
                },
                series: [{
                    data: [820, 932, 901, 934, 1290, 1330, 1320],
                    type: 'line'
                }]
            }
        };
    }
    render(){
        return(
            <div>
                <ReactEcharts option={this.state.echartsOption} />
            </div>
    );
    }
}
ReactDOM.render(<EchartsEditor/>,document.getElementById("container"));

5.在dist目录下创建index.html文件

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="container"></div>
</body>
<script src="bundle.js"></script>
</html>

6.在根目录下创建使用命令创建package.json

npm init -y

7.在根目录下创建使用命令安装webpack、babel、react、echarts 、lodash

npm install webpack webpack-cli --save-dev
npm install babel-preset-flow babel-preset-env babel-preset-stage-1 --save-dev 
npm install react react-dom echarts echarts-for-react lodash --save

安装完后package.json如下:

{
  "name": "react-echarts-editor",
  "version": "0.0.1",
  "dependencies": {
    "echarts": "^4.2.0-rc.2",
    "echarts-for-react": "^2.0.15-beta.0",
    "lodash": "^4.17.11",
    "react": "^16.7.0",
    "react-dom": "^16.7.0"
  },
  "devDependencies": {
    "babel-preset-env": "^1.7.0",
    "babel-preset-flow": "^6.23.0",
    "babel-preset-stage-1": "^6.24.1",
    "webpack": "^4.28.4",
    "webpack-cli": "^3.2.1"
  }
}

8.在根目录下创建webpack.config.js

const path = require('path');
module.exports = {
    entry: './src/app.js',
    output: {
        filename: 'bundle.js',
        path: path.resolve(__dirname, 'dist')
    },
    'module': {
        'rules': [
            {
                'test': /\.(js|jsx)?$/,
                'exclude': /node_modules/,
                use: [{
                    loader: "babel-loader",
                    options: {presets:["env","flow","react","es2015","stage-1"]}
                }]
            }
        ]
    }
}

9.项目结构最后如下:

测试项目

在根目录下执行:

npx webpack

用浏览器打开dist目录下的index.html如下则成功:

以上简单的react+webpack架构就完成了。

编写一些工具函数

createOrSet函数接收echarts的option,propChain为属性链，value为要设置的值(不懂的可以先用)

createOrSet=(echartsOption,propChain,value)=>
    {
        if(_.isString(value)||_.isBoolean(value)||_.isNumber(value)||_.isArray(value)) {
            _.set(echartsOption, propChain, value);
        }else if(_.isObject(value)){
            if(_.get(echartsOption,propChain)===undefined){
                _.set(echartsOption, propChain, value);
            }else{
                let objBefore = _.get(echartsOption,propChain);
                let objAfter = {...objBefore,...value};
                _.set(echartsOption, propChain, objAfter);
            }
        }
        return echartsOption;
    }
    createOrSetProp=(propChain,value)=>
    {
        let echartsOption = _.cloneDeep(this.state.echartsOption);
        echartsOption=this.createOrSet(echartsOption,propChain,value);
        this.setState({echartsOption: echartsOption});
    }

编写属性配置界面

<div style={{width:'50%',float:'left'}}>
    <input type="text"  style={{'width': '100%',float:'left'}} placeholder="输入图表标题" value={_.get(this.state.echartsOption,'title.text','')} onChange={e=>this.createOrSetProp('title.text',e.target.value)} />
    <input type="range" style={{'width': '100%',float:'left'}} defaultValue='60'    min="1" max="100" onChange={(e)=>{this.createOrSetProp('grid.top',e.target.value)}}/>
    <input type="range" style={{'width': '100%',float:'left'}} defaultValue='60'    min="1" max="100" onChange={(e)=>{this.createOrSetProp('grid.bottom',e.target.value)}}/>
    <input type="range" style={{'width': '100%',float:'left'}} defaultValue='10'   min="1" max="100" onChange={(e)=>{this.createOrSetProp('grid.left',e.target.value+'%')}}/>
    <input type="range" style={{'width': '100%',float:'left'}} defaultValue='10'  min="1" max="100" onChange={(e)=>{this.createOrSetProp('grid.right',e.target.value+'%')}}/>
</div>