问题
When running my gulp task, I get the following error:
SyntaxError in plugin "gulp-babel"
Message:
/Users/******/Repos/******/src/scripts/config/index.js: Unexpected export specifier type
> 1 | export * as constants from './constants';
^^^^^^^^^^^^^^
I'm not sure why this is as I am running the required plugins to allow ES6 imports/exports, or so I thought...
.babelrc
{
"presets": [
"@babel/preset-env",
"@babel/preset-react"
],
"plugins": [
"add-module-exports",
"@babel/plugin-transform-modules-commonjs",
"@babel/plugin-proposal-class-properties",
"@babel/plugin-proposal-export-default-from"
]
}
package.json - I've included the full list, most of it will probably be irrelevant but just in case there are any known package conflicts.
"dependencies": {
"@babel/polyfill": "^7.8.3",
"classnames": "^2.2.5",
"concurrent-transform": "^1.0.0",
"deep-freeze": "0.0.1",
"eslint": "^3.17.1",
"eslint-plugin-babel": "^3.2.0",
"eslint-plugin-react": "^6.10.0",
"git-rev": "^0.2.1",
"gulp-awspublish": "^4.0.0",
"gulp-sftp": "^0.1.5",
"moment": "^2.18.1",
"moment-timezone": "^0.5.26",
"path": "^0.12.7",
"qs": "^6.4.0",
"react": "^16.8.4",
"react-addons-css-transition-group": "^15.0.2",
"react-dom": "^16.8.4",
"react-fastclick": "^3.0.2",
"react-redux": "^4.4.5",
"react-router": "^3.2.5",
"react-router-redux": "^4.0.8",
"react-string-replace": "^0.4.0",
"react-transition": "^1.0.3",
"react-transition-group": "^2.7.0",
"redux": "^3.5.2",
"redux-thunk": "^2.3.0",
"underscore": "^1.8.3"
},
"devDependencies": {
"@babel/core": "^7.8.3",
"@babel/plugin-proposal-class-properties": "^7.8.3",
"@babel/plugin-proposal-export-default-from": "^7.8.3",
"@babel/plugin-transform-modules-commonjs": "^7.8.3",
"@babel/preset-env": "^7.8.3",
"@babel/preset-es2015": "^7.0.0-beta.53",
"@babel/preset-react": "^7.8.3",
"axios": "^0.15.3",
"babel-core": "^6.26.3",
"babel-eslint": "^6.0.4",
"babel-jest": "^25.1.0",
"babel-loader": "^8.0.6",
"babel-plugin-add-module-exports": "^1.0.2",
"babel-polyfill": "^6.26.0",
"babelify": "^9.0.0",
"chai": "^3.5.0",
"enzyme": "^2.7.1",
"gulp": "^3.9.1",
"gulp-autoprefixer": "^3.1.1",
"gulp-babel": "^8.0.0",
"gulp-browserify": "^0.5.1",
"gulp-clean": "^0.3.2",
"gulp-color": "0.0.1",
"gulp-connect": "^5.0.0",
"gulp-cssnano": "^2.1.2",
"gulp-htmlmin": "^3.0.0",
"gulp-livereload": "^3.8.1",
"gulp-load-plugins": "^1.5.0",
"gulp-mocha": "^4.3.0",
"gulp-param": "^0.6.4",
"gulp-rename": "^1.2.2",
"gulp-sass": "^3.1.0",
"gulp-sass-glob": "^1.0.8",
"gulp-sourcemaps": "^2.4.1",
"gulp-ssh": "^0.6.0",
"gulp-streamify": "^1.0.2",
"gulp-uglify": "^2.1.0",
"gulp-watch": "^4.3.11",
"gulp-webserver": "^0.9.1",
"jest": "^25.1.0",
"jsdom": "^9.12.0",
"lint-staged": "^3.4.0",
"mocha": "^3.2.0",
"mocha-jsdom": "^1.1.0",
"mocha-junit-reporter": "^1.13.0",
"mock-require": "^2.0.1",
"pre-commit": "^1.2.2",
"prop-types": "^15.5.10",
"react-addons-create-fragment": "^15.6.0",
"react-addons-test-utils": "^15.6.0",
"react-tools": "^0.13.3",
"redux-mock-store": "^1.2.3",
"run-sequence": "^1.2.2"
}
Any help appreciated - I'm really at a loss for this one.
(Using node v9.11.2)
回答1:
From this thread
The problem is that we added export * as ns from "foo" support by default to @babel/parser (in #10521) but not to @babel/preset-env.
As a workaround, you can enable @babel/plugin-proposal-export-namespace-from in your config.
So add @babel/plugin-proposal-export-namespace-from to your .babelrc and dev dependencies and you should be OK!
It looks like eventually this will be built into the preset-env so you won't have to use a plugin.
来源：https://stackoverflow.com/questions/59962828/babel-throws-a-type-error-when-exporting-aggregates