错误:
Uncaught Error: Cannot enable prod mode after platform setup. at main.bundle.js:1
案例:
使用 ng build --prod
生成构建后,应用启动时出错。但是,使用 ng serve
或 ng build
编译的开发版本都可以正常运行。
我尝试了什么:
- 在this回答后,将全局和本地@angular/cli
升级到最新版本,即1.6.0
。
的package.json:
{
"dependencies": {
"@angular/animations": "^5.0.0",
"@angular/common": "^5.0.0",
"@angular/compiler": "^5.0.0",
"@angular/core": "^5.0.0",
"@angular/forms": "^5.0.0",
"@angular/http": "^5.0.0",
"@angular/platform-browser": "^5.0.0",
"@angular/platform-browser-dynamic": "^5.0.0",
"@angular/router": "^5.0.0",
"auth0-js": "^8.11.3",
"bootstrap": "^3.3.7",
"core-js": "^2.4.1",
"jquery": "^3.2.1",
"rxjs": "^5.5.2",
"zone.js": "^0.8.14"
},
"devDependencies": {
"@angular/cli": "^1.6.0",
"@angular/compiler-cli": "^5.0.0",
"@angular/language-service": "^5.0.0",
"@types/jasmine": "~2.5.53",
"@types/jasminewd2": "~2.0.2",
"@types/jquery": "^3.2.16",
"@types/node": "~6.0.60",
"@types/rx": "^4.1.1",
"codelyzer": "~3.2.0",
"jasmine-core": "~2.6.2",
"jasmine-spec-reporter": "~4.1.0",
"karma": "~1.7.0",
"karma-chrome-launcher": "~2.1.1",
"karma-cli": "~1.0.1",
"karma-coverage-istanbul-reporter": "^1.2.1",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.1.2",
"ts-node": "~3.2.0",
"tslint": "~5.7.0",
"typescript": "^2.6.2"
}
}
main.ts
import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app/app.module';
import { environment } from './environments/environment';
if (environment.production) {
enableProdMode();
}
platformBrowserDynamic().bootstrapModule(AppModule).catch(err => console.log(err));
重现错误的最小代码:
答案 0 :(得分:3)
在您JamesNK提供的示例应用中,由于以下行而发生错误: -
文件export const isInDevMode = isDevMode();
cli-reproapp/src/app/app.constants.ts
中的。因此,作为一种解决方法,您可以创建一个函数而不是常量isInDevMode
,如下所示。因此,当代码中实际使用isDevMode()
时,enableProdMode()
稍后会被调用(最重要的是在调用export function isInDevMode():boolean {
return isDevMode();
}
之后)。
this.title = isInDevMode ? 'App in dev mode works.' : 'App is prod mode works.'
显然,在此之后,您还需要更改“isInDevMode”常量用于调用新创建的“isInDevMode()”方法的行。因此,在示例应用程序中,您需要替换app.component.ts中的以下行
this.title = isInDevMode() ? 'App in dev mode works.' : 'App is prod mode works.'
这一个: -
{{1}}
您还可以在链接git/cli-reproapp上看到示例应用的工作版本。