Angular Upgrade 9 to 10 (Step 1 before update)
MODIFY
package.json
package.json
"build-production": "ng build --prod",
"test": "ng test --reporters junit --watch=false",
"lint": "ng lint",
- "e2e": "ng e2e"
+ "e2e": "ng e2e",
+ "postinstall": "ngcc"
},
"private": true,
"dependencies": {

Angular Upgrade 9 to 10 (Step 1 before update)