我看了下其他帖子，说是要webpack降级，我也降级了，但是还是照样提示这个
看到帖子里有说es6改成es5，这里怎么改啊，求告知！
这是我的package里的代码
{
"name": "iredpacket",
"version": "0.1.0",
"private": true,
"scripts": {
"serve": "vue-cli-service serve",
"build": "vue-cli-service build"
},
"dependencies": {
"babel-runtime": "^6.26.0",
"core-js": "^2.6.5",
"vue": "^2.6.10",
"vue-router": "^3.0.3",
"vuex": "^3.0.1"
},
"devDependencies": {
"@vue/cli-plugin-babel": "^3.9.0",
"@vue/cli-service": "^3.9.0",
"babel-core": "^6.26.3",
"babel-loader": "^8.0.6",
"babel-plugin-transform-runtime": "^6.23.0",
"babel-preset-es2015": "^6.24.1",
"babel-preset-stage-0": "^6.24.1",
"node-sass": "^4.9.0",
"sass-loader": "^7.1.0",
"vue-template-compiler": "^2.6.10",
"webpack-dev-server": "^2.7.1"
},
"postcss": {
"plugins": {
"autoprefixer": {}
}
},
"browserslist": [
"> 1%",
"last 2 versions"
]
}
