这是我尝试过的：
- 删除％AppData％/ npm
- 清理npm缓存
- 重新安装角度（npm install -g @ angular / cli @ latest）
- 设置注册表（npm配置设置注册表“ https://registry.npmjs.com/”）
- 以管理员身份一次又一次地尝试所有先前的步骤
最奇怪的是，几个小时前，我能够成功使用npm安装react-create工具。
完整的错误日志
456 verbose stack SyntaxError: Unexpected end of JSON input while parsing near '...3.X","@types/gulp-con'
456 verbose stack at JSON.parse (<anonymous>)
456 verbose stack at parseJson (C:\Program Files\nodejs\node_modules\npm\node_modules\json-parse-better-errors\index.js:7:17)
456 verbose stack at consumeBody.call.then.buffer (C:\Program Files\nodejs\node_modules\npm\node_modules\node-fetch-npm\src\body.js:96:50)
456 verbose stack at process._tickCallback (internal/process/next_tick.js:68:7)
457 verbose cwd C:\_d\WSs\angular
458 verbose Windows_NT 10.0.17763
459 verbose argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install" "-g" "@angular/cli@latest"
460 verbose node v10.15.3
461 verbose npm v6.4.1
462 error Unexpected end of JSON input while parsing near '...3.X","@types/gulp-con'
463 verbose exit [ 1, true ]
***已编辑
我认真遵循了How to completely remove node.js from Windows中发现的所有步骤，包括重新启动PC
我再次安装了node和angular cli。尝试最简单的使用时，我仍然收到类似的错误。请参阅此处所有日志。 PS。我以管理员身份运行
Microsoft Windows [versão 10.0.17763.503]
(c) 2018 Microsoft Corporation. Todos os direitos reservados.
C:\Windows\system32>npm install -g @angular/cli@latest
C:\Users\jimis\AppData\Roaming\npm\ng -> C:\Users\jimis\AppData\Roaming\npm\node_modules\@angular\cli\bin\ng
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.9 (node_modules\@angular\cli\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.9: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
+ @angular/cli@7.3.9
added 295 packages from 180 contributors in 46.07s
C:\Windows\system32>cd C:\_d\WSs\angular
C:\_d\WSs\angular>ng new
? What name would you like to use for the new workspace and initial project? loans-angular
? Would you like to add Angular routing? Yes
? Which stylesheet format would you like to use? CSS
CREATE loans-angular/angular.json (3870 bytes)
CREATE loans-angular/package.json (1312 bytes)
CREATE loans-angular/README.md (1029 bytes)
CREATE loans-angular/tsconfig.json (435 bytes)
CREATE loans-angular/tslint.json (1621 bytes)
CREATE loans-angular/.editorconfig (246 bytes)
CREATE loans-angular/.gitignore (629 bytes)
CREATE loans-angular/src/favicon.ico (5430 bytes)
CREATE loans-angular/src/index.html (299 bytes)
CREATE loans-angular/src/main.ts (372 bytes)
CREATE loans-angular/src/polyfills.ts (2841 bytes)
CREATE loans-angular/src/styles.css (80 bytes)
CREATE loans-angular/src/test.ts (642 bytes)
CREATE loans-angular/src/browserslist (388 bytes)
CREATE loans-angular/src/karma.conf.js (1026 bytes)
CREATE loans-angular/src/tsconfig.app.json (166 bytes)
CREATE loans-angular/src/tsconfig.spec.json (256 bytes)
CREATE loans-angular/src/tslint.json (244 bytes)
CREATE loans-angular/src/assets/.gitkeep (0 bytes)
CREATE loans-angular/src/environments/environment.prod.ts (51 bytes)
CREATE loans-angular/src/environments/environment.ts (662 bytes)
CREATE loans-angular/src/app/app-routing.module.ts (245 bytes)
CREATE loans-angular/src/app/app.module.ts (393 bytes)
CREATE loans-angular/src/app/app.component.html (1152 bytes)
CREATE loans-angular/src/app/app.component.spec.ts (1116 bytes)
CREATE loans-angular/src/app/app.component.ts (217 bytes)
CREATE loans-angular/src/app/app.component.css (0 bytes)
CREATE loans-angular/e2e/protractor.conf.js (752 bytes)
CREATE loans-angular/e2e/tsconfig.e2e.json (213 bytes)
CREATE loans-angular/e2e/src/app.e2e-spec.ts (642 bytes)
CREATE loans-angular/e2e/src/app.po.ts (251 bytes)
npm ERR! Unexpected end of JSON input while parsing near '...","async":"0.2.x","en'
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\jimis\AppData\Roaming\npm-cache\_logs\2019-05-22T15_06_23_035Z-debug.log
Package install failed, see above.