angular ng serve --open

为什么运行不了，下面是报错信息
D:\angluar\blog>ng serve --open
Schema validation failed with the following errors:
Data path "" should have required property 'browserTarget'.

解决办法： 在angular.json文件中添加"browserTarget": "blog:build"：

"architect": { "build": { "builder": "@angular-devkit/build-angular:browser", "options": { "outputPath": "dist/blog", "index": "src/index.html", "main": "src/main.ts", "tsConfig": "tsconfig.app.json", "aot": true, "assets": [ "src/favicon.ico", "src/assets" ], "styles": [ "src/styles.css" ], "scripts": [], "browserTarget": "blog:build" }, "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": "blog:build" }, "configurations": { "production": { "browserTarget": "blog:build:production" } } } }