Angular 编译警告：“在‘@angular/core’中找不到导出‘??defineInjectable’

Question

我正在尝试为 Angular 应用程序提供服务，但我从“ngx-mqtt”中收到此依赖项错误：“^6.6.0”。我的本地CLI是6.2.9版本。我正在尝试更改此依赖项的版本，但仍然收到此错误。我只是不明白为什么会发生这种情况。

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./node_modules/ngx-mqtt/src/mqtt.service.js 390:34-55 \n 中的警告未找到“导出 \'\xc9\xb5\xc9\xb5defineInjectable\'（导入为 \'i0\'）在\'@Angular/core\'中

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./node_modules/ngx-mqtt/src/mqtt.service.js 390:126-137\n 中的警告“未找到导出 \'\xc9\xb5\xc9\xb5inject\'（导入为 \'i0\'）在\'@Angular/core\'中

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./node_modules/ngx-mqtt/src/mqtt.service.js 390:161-172\n 中的警告“未找到导出 \'\xc9\xb5\xc9\xb5inject\'（导入为 \'i0\'）在\'@Angular/core\'中

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这些是我对 package.json 的主要依赖项

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 "dependencies": {\n        "@angular/animations": "^6.1.7",\n        "@angular/cdk": "^6.4.7",\n        "@angular/cli": "~6.2.1",\n        "@angular/common": "^6.1.0",\n        "@angular/compiler": "^6.1.0",\n        "@angular/compiler-cli": "^6.1.0",\n        "@angular/core": "^6.1.0",\n        "@angular/flex-layout": "^6.0.0-beta.18",\n        "@angular/forms": "^6.1.0",\n        "@angular/http": "^6.1.0",\n        "@angular/material": "^6.4.7",\n        "@angular/material-moment-adapter": "^6.4.7",\n        "@angular/platform-browser": "^6.1.0",\n        "@angular/platform-browser-dynamic": "^6.1.0",\n        "@angular/router": "^6.1.0",\n        "@fortawesome/angular-fontawesome": "^0.3.0",\n        "@fortawesome/fontawesome-svg-core": "^1.2.21",\n        "@fortawesome/free-regular-svg-icons": "^5.10.1",\n        "@fortawesome/free-solid-svg-icons": "^5.10.1",\n...\n

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"devDependencies": {\n        "@angular-devkit/build-angular": "~0.8.0",\n        "@angular/language-service": "^6.1.0",\n        "@types/core-js": "^2.5.0",\n        "@types/node": "~8.9.4",\n        "codelyzer": "~4.3.0",\n        "ts-node": "^7.0.1",\n        "tslint": "^5.11.0",\n        "typescript": "^2.9.2"\n}\n

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Answer 1

删除角色^解决"ngx-mqtt": "^6.6.0"了问题。