Error running npm install on ionic2 - ionic2

Question

Tried to build my very first app.
Tried installing a plugin and faced this error issue:
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents#^1.0.0
(node_modules\chokidar\node_modules\fsevents): npm WARN notsup
SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents#1.1.1:
wanted {"os":"darwin","arch":"any"} (current:
{"os":"win32","arch":"x64"}) npm WARN #ionic-native/geolocation#3.6.1
requires a peer of #ionic-native/core#^3.6.0 but none was installed.
npm WARN #ionic-native/geolocation#3.6.1 requires a peer of
rxjs#^5.0.1 but none was installed. npm WARN
#ionic-native/in-app-browser#3.6.1 requires a peer of
#ionic-native/core#^3.6.0 but none was installed. npm WARN
#ionic-native/in-app-browser#3.6.1 requires a peer of rxjs#^5.0.1 but
none was installed.
Wondering if anyone can help

Answer 1

Go to your package.json and ensure the following itens have these values
"dependencies": {
"#angular/common": "4.0.2",
"#angular/compiler": "4.0.2",
"#angular/compiler-cli": "4.0.2",
"#angular/core": "4.0.2",
"#angular/forms": "4.0.2",
"#angular/http": "4.0.2",
"#angular/platform-browser": "4.0.2",
"#angular/platform-browser-dynamic": "4.0.2",
"#ionic-native/core": "^3.6.1",
"#ionic-native/splash-screen": "3.4.2",
"#ionic-native/status-bar": "3.4.2",
"#ionic/storage": "2.0.1",
"ionic-angular": "3.1.1",
"ionicons": "3.0.0",
"rxjs": "5.1.1",
"sw-toolbox": "3.4.0",
"zone.js": "^0.8.5"
},
"devDependencies": {
"#ionic/app-scripts": "1.3.4",
"typescript": "~2.2.1"
}
This is the needed to use the latest Ionic version, probably your #ionic-native/core and rxjs are not in this version, as the erros says it needs a higher version than the one you have.
Change your package.json, delete the node_modules folder of your project and then run npm install in it.
Hope this helps

Answer 2

this is my package.json
"dependencies": {
"#angular/common": "2.2.1",
"#angular/compiler": "2.2.1",
"#angular/compiler-cli": "2.2.1",
"#angular/core": "2.2.1",
"#angular/forms": "2.2.1",
"#angular/http": "2.2.1",
"#angular/platform-browser": "2.2.1",
"#angular/platform-browser-dynamic": "2.2.1",
"#angular/platform-server": "2.2.1",
"#ionic-native/geolocation": "^3.6.1",
"#ionic-native/in-app-browser": "^3.6.1",
"#ionic/storage": "1.1.7",
"ionic-angular": "2.0.0-rc.5",
"ionic-native": "2.2.11",
"ionicons": "3.0.0",
"ng-material-floating-button": "^0.6.2",
"rxjs": "5.0.0-beta.12",
"sw-toolbox": "3.4.0",
"zone.js": "0.6.26"
},
"devDependencies": {
"#ionic/app-scripts": "1.0.0",
"typescript": "2.0.9"
},
"description": "ion_city_view: An Ionic project",
"cordovaPlugins": [],
"cordovaPlatforms": []
}