vue 編譯提示安裝 core-js，很有可能是這個錯：

WARNING: We noticed you're using the `useBuiltIns` option without declaring a core-js version. Currently, we assume version 2.x when no version is passed. Since this default version will likely change in future versions of Babel, we recommend explicitly setting the core-js version you are using via the `corejs` option.You should also be sure that the version you pass to the `corejs` option matches the version specified in your `package.json`'s `dependencies` section. If it doesn't, you need to run one of the following commands:npm install --save core-js@2 npm install --save core-js@3yarn add core-js@2 yarn add core-js@3

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解決方案：

.babelrc

{"presets": [["@babel/env",{"targets": {"chrome": "58","ie": "10"},"useBuiltIns": "usage","corejs": "2" //主要就是這里， 寫2 或者 3 根據你安裝的版本}]],"plugins": ["@babel/plugin-transform-runtime","@babel/plugin-syntax-dynamic-import","@babel/plugin-proposal-object-rest-spread","transform-vue-jsx",["component", {"libraryName": "mint-ui","style": true}]] }

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package.json

"devDependencies": {"@babel/core": "^7.6.4","@babel/plugin-transform-runtime": "^7.6.2","@babel/preset-env": "^7.6.3","babel-core": "^7.0.0-bridge.0","babel-loader": "^7.1.5","babel-plugin-component": "^1.1.1","babel-preset-es2015-node6": "^0.4.0","clean-webpack-plugin": "^0.1.17","clipboard-polyfill": "^2.8.6","copy-webpack-plugin": "^4.5.2","cross-env": "^5.2.0","css-loader": "^0.28.8","eslint-config-prettier": "^6.0.0","eslint-plugin-prettier": "^3.1.0","extract-text-webpack-plugin": "^4.0.0-beta.0","file-loader": "^1.1.11","glob": "^7.1.2","html-loader": "^0.5.5","html-webpack-plugin": "^3.0.6","jquery": "^2.2.4","less": "^3.9.0","less-loader": "^4.1.0","node-sass": "^4.11.0","open": "^0.0.5","postcss": "^7.0.2","postcss-loader": "^2.1.5","postcss-preset-env": "^5.2.1","postcss-short": "^4.1.0","postcss-sorting": "^3.1.0","raw-loader": "^0.5.1","sass-loader": "^6.0.7","shelljs": "^0.8.2","style-loader": "^0.20.3","url-loader": "^1.1.2","vue-loader": "^14.0.3","vue-router": "^3.0.2","vue-template-compiler": "^2.5.16","vue-touch": "^2.0.0-beta.4","webpack": "^4.2.0","webpack-cli": "^3.0.8","webpack-dev-server": "^3.1.1","webpack-merge": "^4.1.3","webpack-spritesmith": "^0.4.1"},"dependencies": {"@babel/polyfill": "^7.6.0","@babel/runtime": "^7.6.3","autoprefixer": "^9.5.0","axios": "^0.18.0","babel-plugin-transform-vue-jsx": "^3.7.0","core-js": "^2.6.10", // 根據這里選擇 上面core 的版本"eslint": "^5.0.0","eslint-plugin-vue": "^5.2.3","fundebug-javascript": "^2.0.0","fundebug-revideo": "^0.6.0","fundebug-vue": "0.0.1","mint-ui": "^2.2.13","qrcode": "^1.4.1","regenerator-runtime": "^0.13.3","styled-jsx": "^3.2.2","swiper": "^4.5.0","typescript": "^3.5.2","underscore": "^1.9.1","vue": "^2.5.16","vue-awesome-swiper": "^3.1.3","vue-baberrage": "^2.1.9","vue-lazyload": "^1.3.3","vue-resource": "^1.5.1","vuex": "^3.1.0"},

總結

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