方式一：transform-runtime

{ "presets": [ [ "env", { "targets": { "browsers": [ "> 1%", "last 2 versions", "not ie <= 8" ] } } ], "stage-2" ], "plugins": [ [ "transform-runtime" ], [ "component", { "libraryName": "mint-ui", "style": true } ], [ "transform-decorators-legacy" ], [ "transform-vue-jsx" ] ] }

方式二：babel-polyfill+ env中配置"useBuiltIns": true 入口 import "babel-polyfill";

{ "presets": [ [ "env", { "targets": { "browsers": [ "> 1%", "last 2 versions", "not ie <= 8" ] }, "useBuiltIns": true } ], "stage-2" ], "plugins": [ [ "component", { "libraryName": "mint-ui", "style": true } ], [ "transform-decorators-legacy" ], [ "transform-vue-jsx" ] ] }

测试方式一更小