problem description
 recently took over an ionic project, but I don"t know what ionic it is. My ionic sserve run prompts me that npm install @ ionic/v1-toolkit 
 can run successfully for the first time, but if you turn off the service and run it again, you will get an error 
 
"dependencies": {
},
  "devDependencies": {
},
  "cordovaPlugins": [
],
  "cordovaPlatforms": [
],
  "cordova": {
}
packgae.josn
, 
 I don"t know if there is any solution 
the environmental background of the problems and what methods you have tried
related codes
/ / Please paste the code text below (do not replace the code with pictures)
