问题
After installing the dependencies successfully using npm install, I got the following error while running the server:
Schema validation failed with the following errors: Data path ".builders['browser']" should have required property 'class'.
After searching for a while, I think the problem is with "@angular-builders/custom-webpack".
The project was working good, but i accidentally deleted it and clone it again, then i got the error.
Here's the dev dependencies:
"devDependencies": {
"@angular-builders/custom-webpack": "latest",
"@angular-builders/dev-server": "latest",
"@angular-devkit/build-angular": "~0.13.6",
"@angular/cli": "~7.3.6",
"@angular/compiler-cli": "~7.2.10",
"@angular/language-service": "~7.2.10",
"@biesbjerg/ngx-translate-extract": "~2.3.4",
"@types/jasmine": "~3.3.12",
"@types/jasminewd2": "~2.0.3",
"@types/node": "~11.11.4",
"codelyzer": "~5.0.0-beta.1",
"dotenv": "latest",
"jasmine-core": "~3.3.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~4.0.1",
"karma-chrome-launcher": "~2.2.0",
"karma-cli": "~2.0.0",
"karma-coverage-istanbul-reporter": "~2.0.0",
"karma-jasmine": "~2.0.1",
"karma-jasmine-html-reporter": "~1.4.0",
"protractor": "~5.4.2",
"rxjs-tslint": "~0.1.7",
"ts-node": "~8.0.3",
"tslint": "~5.14.0",
"typescript": "~3.2.0",
"webpack": "~4.29.6"
}
And here's my angular.json file:
{
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
"version": 1,
"newProjectRoot": "projects",
"projects": {
"iShop": {
"root": "",
"sourceRoot": "src",
"projectType": "application",
"prefix": "app",
"schematics": {
"@schematics/angular:component": {
"styleext": "scss"
}
},
"architect": {
"build": {
"builder": "@angular-builders/custom-webpack:browser",
"options": {
"customWebpackConfig": {
"path": "extra-webpack.config.js"
},
"outputPath": "dist",
"index": "src/index.html",
"main": "src/main.ts",
"tsConfig": "src/tsconfig.app.json",
"polyfills": "src/polyfills.ts",
"assets": [
"src/favicon.ico",
"src/apple-touch-icon.png",
"src/robots.txt",
"src/manifest.json",
"src/assets"
],
"styles": [
"src/main.scss",
"src/assets/css/paymentfont/paymentfont.min.css",
"./node_modules/font-awesome/css/font-awesome.css",
"./node_modules/@ng-select/ng-select/themes/default.theme.css"
],
"scripts": []
}
},
"serve": {
"builder": "@angular-builders/dev-server:generic",
"options": {
"browserTarget": "iShop:build"
},
"configurations": {
"production": {
"browserTarget": "iShop:build:production"
}
}
}
}
},
"iShop-e2e": {
"root": "e2e",
"projectType": "application",
"architect": {
"e2e": {
"builder": "@angular-devkit/build-angular:protractor",
"options": {
"protractorConfig": "e2e/protractor.conf.js",
"devServerTarget": "iShop:serve"
}
},
"lint": {
"builder": "@angular-devkit/build-angular:tslint",
"options": {
"tsConfig": [
"e2e/tsconfig.e2e.json"
],
"exclude": [
"**/node_modules/**"
]
}
}
}
}
},
"defaultProject": "iShop"
}
And my angular CLI version is: 7.3.9
回答1:
I came across the same error. But in my case I needed to use "@angular-builders/custom-webpack:dev-server" builder, which seems to be only available for Angular CLI 8+. I.e. I have to upgrade to Angular 8 first.
Your case should be simpler, as you only use "custom-webpack:browser", which is available in version 7
So try the following: change versions of "@angular-builders/custom-webpack" and
"@angular-builders/dev-server" in package.json to ^7.3.0 (or higher, but not version 8), run npm install or yarn and try building again.
Source: https://github.com/manfredsteyer/ngx-build-plus/issues/109
回答2:
In my case, it was a dependency version problem.
I changed the following dependencies version from:
"@angular-builders/custom-webpack": "latest"
"@angular-builders/dev-server": "latest"
to:
"@angular-builders/custom-webpack": "~7.4.3"
"@angular-builders/dev-server": "~7.3.1"
回答3:
I think you need to change this line
"builder": "@angular-builders/custom-webpack:browser"
to something
"builder": "@angular-devkit/build-angular:browser",
Also check your custom-webpack config in your package.json. The builder have to use default config come from angular
Below is my config
{
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
"version": 1,
"newProjectRoot": "projects",
"projects": {
"angular8": {
"projectType": "application",
"schematics": {
"@schematics/angular:component": {
"style": "scss"
}
},
"root": "",
"sourceRoot": "src",
"prefix": "app",
"architect": {
"build": {
"builder": "@angular-devkit/build-angular:browser",
"options": {
"outputPath": "dist/angular8",
"index": "src/index.html",
"main": "src/main.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "tsconfig.app.json",
"assets": [
"src/favicon.ico",
"src/assets"
],
"styles": [
"src/styles.scss"
],
"scripts": []
},
"configurations": {
"production": {
"fileReplacements": [
{
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.prod.ts"
}
],
"optimization": true,
"outputHashing": "all",
"sourceMap": false,
"extractCss": true,
"namedChunks": false,
"aot": true,
"extractLicenses": true,
"vendorChunk": false,
"buildOptimizer": true,
"budgets": [
{
"type": "initial",
"maximumWarning": "2mb",
"maximumError": "5mb"
}
]
}
}
},
"serve": {
"builder": "@angular-devkit/build-angular:dev-server",
"options": {
"browserTarget": "angular8:build"
},
"configurations": {
"production": {
"browserTarget": "angular8:build:production"
}
}
},
"extract-i18n": {
"builder": "@angular-devkit/build-angular:extract-i18n",
"options": {
"browserTarget": "angular8:build"
}
},
"test": {
"builder": "@angular-devkit/build-angular:karma",
"options": {
"main": "src/test.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "tsconfig.spec.json",
"karmaConfig": "karma.conf.js",
"assets": [
"src/favicon.ico",
"src/assets"
],
"styles": [
"src/styles.scss"
],
"scripts": []
}
},
"lint": {
"builder": "@angular-devkit/build-angular:tslint",
"options": {
"tsConfig": [
"tsconfig.app.json",
"tsconfig.spec.json",
"e2e/tsconfig.json"
],
"exclude": [
"**/node_modules/**"
]
}
},
"e2e": {
"builder": "@angular-devkit/build-angular:protractor",
"options": {
"protractorConfig": "e2e/protractor.conf.js",
"devServerTarget": "angular8:serve"
},
"configurations": {
"production": {
"devServerTarget": "angular8:serve:production"
}
}
}
}
}},
"defaultProject": "angular8"
}
来源：https://stackoverflow.com/questions/57060309/buildersbrowser-should-have-required-property-class