I am working on a micro-frontend project, using vue 3 and single-spa 5.9.3. I was trying to update one Micro-frontend npm packages to recent releases, it builds correctly but throws this error:
"TypeError: application '@myapp/my-module' died in status LOADING_SOURCE_CODE: Cannot read properties of undefined (reading 'meta')
at autoPublicPath (http://localhost:9200/js/app.js:48439:32)
at Object../node_modules/systemjs-webpack-interop/auto-public-path/2.js (http://localhost:9200/js/app.js:48418:1)
at __webpack_require__ (http://localhost:9200/js/app.js:75668:33)
at http://localhost:9200/js/app.js:76740:11
at Object.<anonymous> (http://localhost:9200/js/app.js:76744:12)
at Object.execute (https://cdn.jsdelivr.net/npm/[email protected]/dist/extras/amd.min.js:1:529)
at i (https://cdn.jsdelivr.net/npm/[email protected]/dist/system.min.js:4:4539)
at e (https://cdn.jsdelivr.net/npm/[email protected]/dist/system.min.js:4:5014)
at https://cdn.jsdelivr.net/npm/[email protected]/dist/system.min.js:4:5019"
my '@myapp/my-module' package.json dependencies looks like this:
"dependencies": {
"core-js": "^3.6.5",
"axios": "^0.24.0",
"object-path": "^0.11.8",
"quasar": "^2.5.5",
"single-spa-vue": "^2.1.0",
"vue": "^3.2.29",
"vue-i18n": "^9.1.6",
"vue-inline-svg": "^3.1.0",
"vue-router": "^4.0.0-0",
"vue-axios": "^3.4.0",
"vuex": "^4.0.0-0"
},
"devDependencies": {
"@types/jest": "^27.4.1",
"@typescript-eslint/eslint-plugin": "^5.4.0",
"@typescript-eslint/parser": "^5.4.0",
"@vue/cli-plugin-babel": "^5.0.3",
"@vue/cli-plugin-e2e-cypress": "^5.0.3",
"@vue/cli-plugin-eslint": "^5.0.3",
"@vue/cli-plugin-router": "^5.0.3",
"@vue/cli-plugin-typescript": "^5.0.3",
"@vue/cli-plugin-unit-jest": "^5.0.3",
"@vue/cli-plugin-vuex": "^5.0.3",
"@vue/cli-service": "^5.0.3",
"@vue/eslint-config-typescript": "^9.1.0",
"@vue/test-utils": "^2.0.0-0",
"eslint": "^7.32.0",
"eslint-plugin-import": "^2.25.3",
"eslint-plugin-vue": "^8.0.3",
"jest-junit": "^13.0.0",
"sass": "1.32.12",
"sass-loader": "^10.1.0",
"typescript": "~4.5.5",
"vue-cli-plugin-quasar": "~4.0.4",
"vue-cli-plugin-single-spa": "^3.3.0",
"vue-jest": "^5.0.0-alpha.10"
}
and the single-spa main project "root-config" dependencies and webpack config looks like this:
"devDependencies": {
"@babel/core": "^7.14.6",
"@babel/preset-env": "^7.14.7",
"@types/systemjs": "^6.1.0",
"babel-eslint": "^11.0.0-beta.2",
"babel-loader": "^8.2.2",
"bootstrap": "5.0.1",
"concurrently": "^5.3.0",
"copy-webpack-plugin": "^8.1.0",
"css-loader": "^6.2.0",
"eslint": "^6.8.0",
"eslint-config-important-stuff": "^1.1.0",
"eslint-config-prettier": "^6.15.0",
"eslint-plugin-prettier": "^3.4.0",
"html-webpack-plugin": "^5.3.2",
"jest": "^25.4.0",
"jest-cli": "^25.4.0",
"jest-junit": "^13.0.0",
"mini-css-extract-plugin": "^2.2.0",
"prettier": "^2.3.2",
"pretty-quick": "^2.0.2",
"sass": "^1.38.0",
"sass-loader": "^12.1.0",
"serve": "^12.0.0",
"webpack": "^5.51.0",
"webpack-cli": "^4.8.0",
"webpack-config-single-spa": "^5.0.0",
"webpack-dev-server": "^4.0.0",
"webpack-merge": "^5.8.0"
},
"dependencies": {
"loadash": "^1.0.0",
"single-spa": "^5.9.3"
},
webpack.config.js:
const { merge } = require("webpack-merge");
const singleSpaDefaults = require("webpack-config-single-spa");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const CopyWebpackPlugin = require("copy-webpack-plugin");
module.exports = (webpackConfigEnv, argv) => {
const orgName = "myapp";
const defaultConfig = singleSpaDefaults({
orgName,
projectName: "root-config",
webpackConfigEnv,
argv,
disableHtmlGeneration: true,
});
return merge(defaultConfig, {
plugins: [
new HtmlWebpackPlugin({
inject: false,
template: "src/index.ejs",
templateParameters: {
isLocal: webpackConfigEnv && webpackConfigEnv.isLocal,
orgName,
},
}),
new MiniCssExtractPlugin({
filename: "css/style.css",
}),
new CopyWebpackPlugin({
patterns: [
{
from: "./src/assets",
to: "./assets",
},
{
from: "./src/config",
to: "./config",
},
{
from:"favicon.ico",
to: "favicon.ico",
},
{
from:"staticwebapp.config.json",
to:"staticwebapp.config.json"
}
],
}),
],
module: {
rules: [
{
test: /\.s[ac]ss$/i,
use: [
MiniCssExtractPlugin.loader,
"css-loader",
{
loader: "sass-loader",
options: {
implementation: require("sass"),
},
},
],
},
],
},
externals: ["single-spa", "vue", "vue-router", "vuex", /^@myapp\/.+$/],
});
};
it looks like there is an issue between webpack v5 and v4 versions, but there is no obvious problem to fix from that side.
I had the same issue migrating to webpack 5 and vue-cli-plugin-single-spa v3.3.0. In your individual application you need to set a field in the vue.config.js:
module.exports = {
// various other settings such as publicPath, etc
// ...
configureWebpack: {
output: {
libraryTarget: 'system',
},
},
}
I'm not sure if you also need this in your webpack.config.js:
return merge(defaultConfig, {
output: {
libraryTarget: 'system'
},
// other settings