how does element ui configure demand loading in vuecli3?
cli3 default devDependencies
"devDependencies": {
"@vue/cli-plugin-babel": "^3.0.0-rc.5",
"@vue/cli-plugin-eslint": "^3.0.0-rc.5",
"@vue/cli-service": "^3.0.0-rc.5",
"@vue/eslint-config-standard": "^3.0.0-rc.5",
"node-sass": "^4.9.0",
"sass-loader": "^7.0.1",
"vue-template-compiler": "^2.5.16"
}