我正在构建一个可重用的反应库,该库使用其他反应库作为依赖项。我正在使用webpack作为构建工具。
我遇到的挑战是当我将我的库导入我的应用程序时,我使用create-react-app构建,我收到以下错误:
addComponentAsRefTo(...): Only a ReactOwner can have refs.
You might be adding a ref to a component that was not created inside a component's `render` method,
or you have multiple copies of React loaded (details: https://facebook.github.io/react/warnings/refs-must-have-owner.html).
根据我的理解,问题是webpack在我的库中以冲突的版本捆绑了一个额外的react副本。
我尝试了几条建议,但似乎都没有。我试过:
1.在我的webpack中添加react作为别名 resolve: {
alias: {
'react' : path.resolve(__dirname, 'node_modules/react'),
},
modules: [path.join(__dirname, 'node_modules')],
extensions: [".js", ".jsx"]
},
2.在webpack中添加反应和反应作为外部:
externals: {
'ReactCSSTransitionGroup': 'react/lib/ReactCSSTransitionGroup',
'react': {
commonjs: 'react',
commonjs2: 'react',
amd: 'react',
umd: 'react',
root: 'React'
},
'react-dom': {
commonjs: 'react-dom',
commonjs2: 'react-dom',
amd: 'react-dom',
umd: 'react-dom',
root: 'ReactDOM'
}
},
3.还尝试在package.json中添加react作为devDependency和peerDependency。
如果我在将库链接到应用程序时删除了node_modules文件夹,它将开始工作。这显然不是一个解决方案,而是更多的暗示,它正在从node_modules中提取额外的响应副本。一旦我运行npm i
,问题就会恢复。
这是我的完整网络包:
const path = require('path')
const SRC_DIR = path.resolve(__dirname, 'src')
const DIST_DIR = path.resolve(__dirname, 'dist')
module.exports = {
entry: SRC_DIR + '/index.js',
output: {
path: DIST_DIR,
filename: 'index.js',
libraryTarget: 'umd'
},
resolve: {
alias: {
'react' : path.resolve(__dirname, 'node_modules/react'),
},
modules: [path.join(__dirname, 'node_modules')],
extensions: [".js", ".jsx"]
},
resolveLoader: {
modules: [path.join(__dirname, 'node_modules')]
},
externals: {
'ReactCSSTransitionGroup': 'react/lib/ReactCSSTransitionGroup',
'react': {
commonjs: 'react',
commonjs2: 'react',
amd: 'react',
umd: 'react',
root: 'React'
},
'react-dom': {
commonjs: 'react-dom',
commonjs2: 'react-dom',
amd: 'react-dom',
umd: 'react-dom',
root: 'ReactDOM'
}
},
module: {
loaders: [
{ test: /\.css$/, loader: 'style-loader!css-loader' },
{
test: /\.js?/,
include: SRC_DIR,
loader: 'babel-loader',
exclude: /node_modules/,
query: {
presets: ['es2015', 'react', 'stage-0'],
plugins: [
'transform-class-properties',
'transform-object-rest-spread'
]
}
}
]
}
};
我的package.json:
{
"name": "test-library",
"version": "1.0.0",
"main": "dist/index.js",
"scripts": {
"start": "webpack --progress --colors --watch",
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "",
"license": "ISC",
"description": "",
"devDependencies": {
"babel-core": "6.26.0",
"babel-loader": "7.1.2",
"babel-plugin-react-css-modules": "3.2.1",
"babel-plugin-transform-class-properties": "6.24.1",
"babel-plugin-transform-object-rest-spread": "6.26.0",
"babel-plugin-transform-runtime": "6.23.0",
"babel-preset-es2015": "6.24.1",
"babel-preset-react": "6.24.1",
"babel-preset-stage-0": "6.24.1",
"react": "^15.0.0",
"react-bootstrap-table": "4.0.2",
"react-dom": "15.6.1"
}
}
我还创建了两个repos来重现bug,一个是测试应用程序,一个是测试库。重现:
克隆应用和库并运行npm i
:
app:https://github.com/scottmcpherson/test-app
图书馆:https://github.com/scottmcpherson/git-library
cd进入库并运行npm link
进入应用并运行npm link test-library
cd回到应用程序并运行npm start
您应该会在浏览器中看到错误。如果您在编辑器中打开应用程序并查看App.js,您可以看到我在哪里导入测试库。
仅发生此错误,因为库取决于react-bootstrap-table
。如果我注释掉该模块并只渲染一个普通的jsx表,那么一切都可以找到。
答案 0 :(得分:0)
根据documentation以避免依赖重复,您可以尝试这样做:
new webpack.optimize.CommonsChunkPlugin({
name: 'common'
})