babel7正式版已经发布。 官方包增加了@标识
核心的有 "@babel/core" "@babel/preset-env"

stage 已被废除

配置一： { "presets": [ [ "@babel/preset-env", { "targets": { "browsers": ["> 1%", "last 2 versions", "not ie <= 8"] }, "useBuiltIns":"usage", "modules": false, "debug": true } ] ], "plugins": [ ["transform-vue-jsx"], [ "component", { "libraryName": "mint-ui", "style": true } ] ] }

设置"useBuiltIns":"usage" 依赖@babel/polyfill 不需要显式import

会根据代码中用到的新语法按需 添加polyfill

适合开发网页 应用等

配置二： { "presets": [ [ "@babel/preset-env", { "targets": { "browsers": ["> 1%", "last 2 versions", "not ie <= 8"] }, "modules": false, "debug": true } ] ], "plugins": [ ["transform-vue-jsx"], ["@babel/plugin-transform-runtime"], [ "component", { "libraryName": "mint-ui", "style": true } ] ] }

@babel/plugin-transform-runtime 实例方法无法转换 不会污染全局 适合开发库 工具包