我正在做一个相对较老的Ionic项目，该项目是由另一个在我公司之前工作过的人编写的，我无法正确构建它。原因是，当我运行npm install时，收到有关同级依赖项的过多警告。
我尝试手动安装对等依赖项，但没有成功。我发现这可能是由于依赖版本之间的某些冲突。但是我完全迷失了，因为我是Ionic和npm的新手。 我试图通过将对等依赖项添加到peerDependencies部分来更新我的package.json文件。现在是这样：
"dependencies": {
"@angular/common": "^6.0.0",
"@angular/compiler": "4.1.3",
"@angular/compiler-cli": "4.1.3",
"@angular/core": "^7.0.0",
"@angular/forms": "4.1.3",
"@angular/http": "4.1.3",
"@angular/platform-browser": "^6.0.0",
"@angular/platform-browser-dynamic": "^6.0.0",
"@ionic-native/camera": "^4.17.0",
"@ionic-native/core": "^4.11.0",
"@ionic-native/device": "^4.17.0",
"@ionic-native/email-composer": "^4.17.0",
"@ionic-native/firebase": "^4.15.0",
"@ionic-native/keyboard": "^4.12.0",
"@ionic-native/photo-viewer": "^4.17.0",
"@ionic-native/social-sharing": "^4.16.0",
"@ionic-native/splash-screen": "3.12.1",
"@ionic-native/status-bar": "3.12.1",
"@ionic/storage": "2.0.1",
"@ngx-translate/core": "^11.0.0",
"ajv": "^6.10.2",
"angularfire2": "^5.0.2",
"com-sarriaroman-photoviewer": "1.1.18",
"cordova": "^9.0.0",
"cordova-android": "^8.0.0",
"cordova-ios": "^5.0.1",
"cordova-plugin-androidx": "^1.0.2",
"cordova-plugin-androidx-adapter": "^1.1.0",
"cordova-plugin-camera": "4.0.3",
"cordova-plugin-device": "^1.1.4",
"cordova-plugin-email-composer": "0.8.15",
"cordova-plugin-firebase": "^2.0.5",
"cordova-plugin-firebasex": "^6.0.6",
"cordova-plugin-ionic-keyboard": "^2.1.3",
"cordova-plugin-ionic-webview": "^4.1.0",
"cordova-plugin-splashscreen": "^4.0.3",
"cordova-plugin-statusbar": "^2.2.2",
"cordova-plugin-uniquedeviceid": "^1.3.2",
"cordova-plugin-whitelist": "^1.3.1",
"cordova-plugin-x-socialsharing": "5.4.1",
"es6-promise-plugin": "4.2.2",
"firebase": "^5.5.3",
"ionic-angular": "3.5.0",
"ionicons": "3.0.0",
"node-sass": "^4.9.3",
"rxjs": "^6.3.0",
"sw-toolbox": "3.6.0",
"zone.js": "0.8.12"
},
"devDependencies": {
"@ionic/app-scripts": "^3.2.4",
"@ionic/cli-plugin-cordova": "1.4.1",
"@ionic/cli-plugin-ionic-angular": "1.3.2",
"install-peers": "^1.0.3",
"typescript": "2.3.4"
},
"peerDependencies": {
"@angular/common": "4.1.3",
"@angular/compiler": "6.1.10",
"@angular/core": "4.1.3",
"@angular/platform-browser": "4.1.3",
"@angular/platform-browser-dynamic": "4.1.3",
"@firebase/app-types": "0.x",
"@firebase/util": "0.x",
"rxjs": "5.4.0",
"zone.js": "~0.8.26"
}
如您所见，有些依赖项在依赖项和peerDependencies部分上具有不同的版本。而且我不知道该怎么办。
我安装了一个名为install-peers的npm软件包，当我进行npm安装时，我得到了：
> install-peers@1.0.3 postinstall /Users/matheushr/workspace/Plis/plis-frontend/node_modules/install-peers
> node install.js
Installed peerDependencies as devDependencies via npm.
+ @angular/platform-browser-dynamic@4.1.3
+ @angular/platform-browser@4.1.3
+ rxjs@5.4.0
+ @angular/common@4.1.3
+ zone.js@0.8.29
+ @firebase/util@0.2.25
+ @angular/core@4.1.3
+ @angular/compiler@6.1.10
+ @firebase/app-types@0.4.3
added 7 packages from 2 contributors, updated 9 packages, moved 1 package and audited 9936 packages in 72.829s
found 0 vulnerabilities
npm WARN Plis@0.0.1 requires a peer of @angular/common@4.1.3 but none is installed. You must install peer dependencies yourself.
npm WARN Plis@0.0.1 requires a peer of @angular/compiler@6.1.10 but none is installed. You must install peer dependencies yourself.
npm WARN Plis@0.0.1 requires a peer of @angular/core@4.1.3 but none is installed. You must install peer dependencies yourself.
npm WARN Plis@0.0.1 requires a peer of @angular/platform-browser@4.1.3 but none is installed. You must install peer dependencies yourself.
npm WARN Plis@0.0.1 requires a peer of @angular/platform-browser-dynamic@4.1.3 but none is installed. You must install peer dependencies yourself.
npm WARN Plis@0.0.1 requires a peer of rxjs@5.4.0 but none is installed. You must install peer dependencies yourself.
npm WARN Plis@0.0.1 requires a peer of zone.js@~0.8.26 but none is installed. You must install peer dependencies yourself.
npm WARN @angular/common@6.1.10 requires a peer of @angular/core@6.1.10 but none is installed. You must install peer dependencies yourself.
npm WARN @angular/compiler@4.1.3 requires a peer of @angular/core@4.1.3 but none is installed. You must install peer dependencies yourself.
npm WARN @angular/core@7.2.15 requires a peer of zone.js@~0.8.26 but none is installed. You must install peer dependencies yourself.
npm WARN @angular/platform-browser@6.1.10 requires a peer of @angular/core@6.1.10 but none is installed. You must install peer dependencies yourself.
npm WARN @angular/platform-browser-dynamic@6.1.10 requires a peer of @angular/core@6.1.10 but none is installed. You must install peer dependencies yourself.
npm WARN @angular/platform-browser-dynamic@6.1.10 requires a peer of @angular/compiler@6.1.10 but none is installed. You must install peer dependencies yourself.
npm WARN @ionic-native/core@4.20.0 requires a peer of rxjs@^5.5.11 but none is installed. You must install peer dependencies yourself.
尝试构建项目时，出现以下错误：
[17:15:01] typescript: node_modules/@angular/compiler/src/output/output_ast.d.ts, line: 600
In 'const' enum declarations member initializer must be constant expression.
L599: text?: string;
L600: } | {
L601: tagName?: undefined;
[17:15:01] typescript: node_modules/@angular/compiler/src/output/output_ast.d.ts, line: 601
In 'const' enum declarations member initializer must be constant expression.
L600: } | {
L601: tagName?: undefined;
L602: text: string;
[17:15:01] typescript: node_modules/@angular/compiler/src/output/output_ast.d.ts, line: 602
In 'const' enum declarations member initializer must be constant expression.
L601: tagName?: undefined;
L602: text: string;
L603: };
[17:15:01] typescript: src/app/app.component.ts, line: 22
Cannot find module 'rxjs/operators'.
L21: import { EditUser } from './../pages/edit/edit';
L22: import { tap } from 'rxjs/operators';
L23: import { PrivacidadePage } from '../pages/privacidade/privacidade';
[17:15:01] typescript: src/app/app.component.ts, line: 86
Property 'disableScroll' does not exist on type 'Keyboard'.
L85: this.rootPage = this.initComp();
L86: this.keyboard.disableScroll(true);
L87: });
[17:15:01] typescript: src/components/authentication/authentication.ts, line: 26
Property 'disableScroll' does not exist on type 'Keyboard'.
L26: this.keyboard.disableScroll(true);
[17:15:01] typescript: src/pages/user-forgotpassword/user-forgotpassword.ts, line: 21
Property 'disableScroll' does not exist on type 'Keyboard'.
L21: this.keyboard.disableScroll(false);
[17:15:01] typescript: src/pages/user-signup/user-signup.ts, line: 32
Property 'disableScroll' does not exist on type 'Keyboard'.
L32: this.keyboard.disableScroll(true);
我真的不知道如何使它工作。
答案 0 :(得分：0)
我感到你很痛苦。我不使用Ionic，但会定期使用npm。每当您看到“您必须自己安装对等依赖项”时，通常这是一个很好的指示，您将需要执行此操作。
您已经知道如何使用npm安装软件包。请记住，在该命令中使用--save标志或--save-dev标志，以便在此过程中不断更新package.json文件。
我一直使用的效果很好的工具称为npm-check-updates，它帮助我极大地快速将旧的分期付款分解为更新的，可以使用的安装。
老实说，除非您在npm安装过程中不再遇到严重错误，否则我不会尝试再次构建。希望这会有所帮助！
[EDIT]：我意识到您可能正在问有关完全 peerDependencies的问题，这有点不同，而且我没有碰到太多。我确实找到了一篇似乎可以很好地解释它的文章：npm Peer Dependencies，希望这一点可以进一步阐明您的情况，并助您一臂之力！