{ "presets": [ [ "env", { "modules": false, "targets": { "browsers": ["> 1%", "last 2 versions", "not ie <= 8"] } } ], "stage-2" ], "plugins": [ [ "component", { "libraryName": "element-ui", "styleLibraryName": "theme-chalk" } ], "transform-vue-jsx", "transform-runtime" ], "env": { "test": { "presets": ["env", "stage-2"] } } }