vue中Npm run build 根据环境传递参数方法来打包不同

'use strict'
const merge = require('webpack-merge')
const prodEnv = require('./prod.env')
module.exports = merge(prodEnv, {
 NODE_ENV: '"development"',
 HOST: '"dev"'
})

'use strict'
let HOST = process.argv.splice(2)[0] || 'prod';
console.log(HOST);
module.exports = {
 NODE_ENV: '"production"',
 HOST: '"'+HOST+'"'
}

/
 设置API接口域名
/
let apiUrl = '';
// 根据 process.env.HOST 的值判断当前是什么环境
// 命令npm run build -- test ，process.env.HOST就设置为'test'
let HOST = process.env.HOST;
HOST = HOST === 'prod' ? '' : '-' + HOST;
apiUrl = 'http://api'+HOST+'.demo.';
axios.defaults.baseURL = apiUrl;

apiUrl = 'http://api-test.demo.'

apiUrl = 'http://api.demo.'