import * as dotenv from 'dotenv' export function loadEnv(mode) { const ret = {} // 在应用之前咱们先指定加载哪个环境变量 dotenv.config({ path: `.env.${mode}` }) Object.keys(process.env).forEach(envName => { const realName = process.env[envName].replace(/\\n/g, '\n') ret[envName] = realName process.env[envName] = realName }) return ret }