css - Webpack 2 duplicate declaration when redefine a style inside reactjs -


i error: 

error in ./src/data/js/component/mdldropdown.jsx module build failed: d:/programming/src/data/js/component/mdldropdown.jsx: duplicate declaration "selectfield"

when use webpack 2 config:

const path = require('path'); const appcfg = require("./app.config.js"); var packg = require("./package.json"); var webpackuglifyjsplugin = require("webpack-uglify-js-plugin")   //babel loader const babelloader = {   test: /\.jsx$/,   exclude: /node_modules/,   include: [path.resolve(__dirname, "./src/data/js")],     loader: 'babel-loader'  };   let wp = {    entry: {     mainapp: appcfg.entrypointjs,                //mainapp.bundle.js     vendor: object.keys(packg.dependencies)      //vendor.min.js   },    output: {     filename:"[name].bundle.js",     path: path.resolve(__dirname, appcfg.outputdir)   },    module: {      rules:[       babelloader,         {             test: /\.css$/,             use: ['style-loader', 'css-loader'],                     }     ]   },    resolve: {     extensions: [".js", ".jsx"]               },    /*, external module */     externals: {       "react": "react",       "react-dom": "reactdom",         "jquery": "jquery"     } };

when process follow source:

import react 'react'; import reactdom "react-dom"; import { selectfield, option } 'react-mdl-extra';   const selectfield = styled.selectfield``;  //redefine width of original component   /**  ui component rapresents state  component stateless   */ export default class mdldropdown extends react.component {        constructor(props) {         super(props);          this.state = {currentselection:""};     }      /**      init vars      */     componentwillmount() {         const { defaultvalue } = this.props;         if(defaultvalue)             this.setstate({currentselection:defaultvalue});     }       render() {          const { id,onchange,valuearray,displayarray,label } = this.props;           const on_change = (v)=>{             this.setstate({currentselection:v});             if(onchange)                 onchange(v);         };          //displayarray[idx]         const map_option = ()=>{return valuearray.map((val,idx,ar)=>{             return <option value={val}>{displayarray[idx]}</option>          })};             return (             <selectfield id={id}   onchange={on_change}  label={label} value={this.state.currentselection} >                 {map_option()}             </selectfield>         );           /*         return (             <select id={id} ref="ddn" style={style} onchange={on_change}  label={label} value={this.state.currentselection} >                 {map_option()}             </select>         )         */     }  }

i want replace original css, because author of component set width in css (https://github.com/hribb/react-mdl-extra/blob/master/src/selectfield/selectfield.css).

i read example , i'd set width above error arise... when declare const selectfield

p.s. can read use react, material lite, babel


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