我正在尝试在Mac上从github运行一个项目。
当在终端中正确文件夹中的npm install之后执行ng serve或ng build时，出现以下错误
Could not find the implementation for builder @angular-devkit/build-angular:dev-server
Error: Could not find the implementation for builder @angular-devkit/build-angular:dev-server
at WorkspaceNodeModulesArchitectHost.resolveBuilder (/Users/x/x/x/Angular/node_modules/@angular/cli/node_modules/@angular-devkit/architect/node/node-modules-architect-host.js:49:19)
at ServeCommand.initialize (/Users/sydney/Downloads/HealthLock-Webapp-master/Angular/node_modules/@angular/cli/models/architect-command.js:135:55)
at async ServeCommand.validateAndRun (/Users/sydney/Downloads/HealthLock-Webapp-master/Angular/node_modules/@angular/cli/models/command.js:127:9)
at async Object.runCommand (/Users/x/x/x/Angular/node_modules/@angular/cli/models/command-runner.js:178:24)
at async default_1 (/Users/x/x/x/Angular/node_modules/@angular/cli/lib/cli/index.js:32:31)
根据我在其他时间在这里和其他网站上提出过的问题找到的所有信息，我一直在关注。我已卸载并重新安装。我已经清除了缓存。我已经尝试过npm install --save-dev @angular-devkit/build-angular，npm update，npm i --only=dev，ng update。我尝试了所有可以找到的解决方案，但没有一个起作用。
这是我的版本：
Angular CLI: 8.0.0
Node: 12.3.1
OS: darwin x64
Angular: 8.0.0
@angular-devkit/architect: 0.13.9
@angular-devkit/build-angular: 0.13.9
@angular-devkit/build-optimizer: 0.13.9
@angular-devkit/build-webpack: 0.13.9
@angular-devkit/core: 7.3.9
@angular-devkit/schematics: 8.0.0
@angular/cdk: 7.3.7
@angular/http: 8.0.0-beta.10
@ngtools/webpack: 7.3.9
@schematics/angular: 8.0.0
@schematics/update: 0.800.0
rxjs: 6.5.2
typescript: 3.4.5
webpack:4.29.0
这是我的json文件
{
"name": "x",
"version": "0.0.0",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"@angular/animations": "^8.0.0",
"@angular/cdk": "^7.3.7",
"@angular/common": "^8.0.0",
"@angular/compiler": "^8.0.0",
"@angular/core": "^8.0.0",
"@angular/forms": "^8.0.0",
"@angular/http": "^8.0.0-beta.10",
"@angular/platform-browser": "^8.0.0",
"@angular/platform-browser-dynamic": "^8.0.0",
"@angular/router": "^8.0.0",
"@types/moment": "^2.13.0",
"angular2-signaturepad": "^2.8.0",
"core-js": "^2.6.9",
"hammerjs": "^2.0.8",
"html2canvas": "^1.0.0-rc.2",
"jspdf": "^1.5.3",
"lodash": "^4.17.11",
"moment": "^2.24.0",
"ng-circle-progress": "^1.4.1",
"ng-select": "^1.0.1",
"ngx-bootstrap": "^3.3.0",
"ngx-device-detector": "^1.3.5",
"ngx-mask": "^6.5.18",
"ngx-owl-carousel-o": "^0.1.2",
"rxjs": "6.5.2",
"rxjs-compat": "6.3.3",
"zone.js": "^0.9.1"
},
"devDependencies": {
"@angular-devkit/build-angular": "^0.13.9",
"@angular/cli": "^8.0.0",
"@angular/compiler-cli": "^8.0.0",
"@angular/language-service": "^8.0.0",
"@types/jasmine": "^2.8.16",
"@types/jasminewd2": "^2.0.6",
"@types/lodash": "^4.14.132",
"@types/node": "~8.9.4",
"codelyzer": "~4.2.1",
"jasmine-core": "~2.99.1",
"jasmine-spec-reporter": "~4.2.1",
"karma": "^4.1.0",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "^2.0.5",
"karma-jasmine": "~1.1.1",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "^5.4.2",
"ts-node": "~5.0.1",
"tslint": "~5.9.1",
"typescript": "^3.4.5"
}
}
Angular.json文件
{
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
"version": 1,
"newProjectRoot": "projects",
"projects": {
"healthlock": {
"root": "",
"sourceRoot": "src",
"projectType": "application",
"prefix": "app",
"schematics": {
"@schematics/angular:component": {
"styleext": "scss"
}
},
"architect": {
"build": {
"builder": "@angular-devkit/build-angular:browser",
"options": {
"outputPath": "dist/healthlock",
"index": "src/index.html",
"main": "src/main.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "src/tsconfig.app.json",
"assets": [
"src/favicon.ico",
"src/assets"
],
"styles": [
"node_modules/ngx-owl-carousel-o/lib/styles/prebuilt-themes/owl.carousel.min.css",
"node_modules/ngx-owl-carousel-o/lib/styles/prebuilt-themes/owl.theme.default.min.css",
"src/styles.scss"
],
"scripts": ["src/env.js"]
},
"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
}
}
},
"serve": {
"builder": "@angular-devkit/build-angular:dev-server",
"options": {
"browserTarget": "healthlock:build"
},
"configurations": {
"production": {
"browserTarget": "healthlock:build:production"
}
}
},
"extract-i18n": {
"builder": "@angular-devkit/build-angular:extract-i18n",
"options": {
"browserTarget": "healthlock:build"
}
},
"test": {
"builder": "@angular-devkit/build-angular:karma",
"options": {
"main": "src/test.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "src/tsconfig.spec.json",
"karmaConfig": "src/karma.conf.js",
"styles": [
"src/styles.scss"
],
"scripts": [],
"assets": [
"src/favicon.ico",
"src/assets"
]
}
},
"lint": {
"builder": "@angular-devkit/build-angular:tslint",
"options": {
"tsConfig": [
"src/tsconfig.app.json",
"src/tsconfig.spec.json"
],
"exclude": [
"**/node_modules/**"
]
}
}
}
},
"healthlock-e2e": {
"root": "e2e/",
"projectType": "application",
"architect": {
"e2e": {
"builder": "@angular-devkit/build-angular:protractor",
"options": {
"protractorConfig": "e2e/protractor.conf.js",
"devServerTarget": "healthlock:serve"
},
"configurations": {
"production": {
"devServerTarget": "healthlock:serve:production"
}
}
},
"lint": {
"builder": "@angular-devkit/build-angular:tslint",
"options": {
"tsConfig": "e2e/tsconfig.e2e.json",
"exclude": [
"**/node_modules/**"
]
}
}
}
}
},
"defaultProject": "healthlock"
答案 0 :(得分：3)
我在一些项目中遇到过同样的问题。我运行了npm i --save-dev @angular-devkit/build-angular@latest，它似乎可以解决所有问题。
注意-我的命令末尾有@latest，它将安装最新版本。在我发布此答案时，它安装了版本“ 0.800.3”。
希望这对您有帮助！
答案 1 :(得分：0)
能否请您共享文件：angular.json
您在架构师内部应该有这样的东西：{..}
服务：
...
"serve": {
"builder": "@angular-devkit/build-angular:dev-server",
"options": {
"browserTarget": "HealthLock-Webapp-master:build"
},
"configurations": {
"production": {
"browserTarget": "HealthLock-Webapp-master:build:production"
}
}
}, ...
对于ng build：
...
"build": {
"builder": "@angular-devkit/build-angular:browser",
"options": {
"outputPath": "dist",
"index": "src/index.html",
"main": "src/main.ts",
"tsConfig": "src/tsconfig.app.json",
"polyfills": "src/polyfills.ts",
"assets": [
"src/assets",
"src/favicon.ico"
],
"styles": [
"src/styles.scss",
"src/theme.scss"
],
"scripts": []
},
"configurations": {
"production": {
"optimization": true,
"outputHashing": "all",
"sourceMap": false,
"extractCss": true,
"namedChunks": false,
"aot": true,
"extractLicenses": true,
"vendorChunk": false,
"buildOptimizer": true,
"fileReplacements": [
{
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.prod.ts"
}
]
}}...
答案 2 :(得分：0)
@ angular / cli @ 8的最新发行版似乎有问题；该issue可能是相关的。我建议暂时降级为@ angular / cli @ 7。
答案 3 :(得分：0)
您可以尝试：
npm uninstall @angular-devkit/build-angular
npm install @angular-devkit/build-angular
ng update --all
好像您正在使用旧的构建器。在版本8中，我们更新了CLI的某些内部组件。