错误 TS2304：找不到名称“_ZonePrivate”

Question

我正在尝试测试我的 angular 9 应用程序，但是在使用ng serve运行时出现错误。 它说它运行良好，但是当我尝试显示该页面时，它说Cannot GET / 。 此外，当我尝试使用ng build它时，它会显示相同的错误消息，但日志中没有任何有用的信息。

ERROR in node_modules/zone.js/lib/browser/event-target-legacy.d.ts:9:67 - error TS2304: Cannot find name '_ZonePrivate'.

9 export declare function eventTargetLegacyPatch(_global: any, api: _ZonePrivate): boolean;
                                                                    ~~~~~~~~~~~~
node_modules/zone.js/lib/browser/event-target-legacy.d.ts:10:54 - error TS2304: Cannot find name '_ZonePrivate'.

10 export declare function patchEvent(global: any, api: _ZonePrivate): void;
                                                        ~~~~~~~~~~~~

这是我的依赖项：

"dependencies": {
  "@angular/animations": "~9.1.12",
  "@angular/cdk": "^9.2.4",
  "@angular/cli": "^9.1.12",
  "@angular/common": "~9.1.12",
  "@angular/compiler": "~9.1.12",
  "@angular/core": "~9.1.12",
  "@angular/forms": "~9.1.12",
  "@angular/localize": "~9.1.12",
  "@angular/material": "^9.2.4",
  "@angular/platform-browser": "~9.1.12",
  "@angular/platform-browser-dynamic": "~9.1.12",
  "@angular/router": "~9.1.12",
  "@angular/service-worker": "^9.1.12",
  "@types/showdown": "^1.9.3",
  "ace-builds": "^1.4.9",
  "bootstrap": "^4.5.2",
  "material-icons": "^0.3.1",
  "ngx-showdown": "^5.1.0",
  "rxjs": "~6.6.0",
  "showdown-highlight": "^2.1.5",
  "tslib": "^1.10.0",
  "zone.js": "~0.10.2"
},
"devDependencies": {
  "@angular-devkit/build-angular": "^0.901.12",
  "@angular/compiler-cli": "~9.1.12",
  "@types/jasmine": "~3.5.0",
  "@types/jasminewd2": "~2.0.3",
  "@types/node": "^12.11.1",
  "codelyzer": "^6.0.0",
  "jasmine-core": "~3.6.0",
  "jasmine-spec-reporter": "~5.0.0",
  "karma": "~5.0.0",
  "karma-chrome-launcher": "~3.1.0",
  "karma-coverage-istanbul-reporter": "~3.0.2",
  "karma-jasmine": "~4.0.0",
  "karma-jasmine-html-reporter": "^1.5.0",
  "protractor": "~7.0.0",
  "ts-node": "~8.3.0",
  "tslint": "~6.1.0",
  "typescript": "~3.8.3"
}

如果您需要更多信息，我非常乐意提供。

Answer 1

我有同样的问题。 我从 app-routing.module.ts 中删除了以下导入：

import {patchCallbacks} from "zone.js/lib/browser/browser-util";

（因为它无论如何都没有使用过）

而这似乎已经解决了这个问题。

不知道这是否可以帮助你。

Answer 2

如果您不小心从 'zone.js...' 导入（也许使用 IDE 自动导入）某些内容，则可能会发生这种情况，只需搜索字符串

from 'zone.js

或字符串

from "zone.js

在您的项目中并将其删除（如果没有必要）。