ERROR in Cannot resolve type entity i9.NgxFileDropModule to symbol

Question

I have migrated angular 8 to version 10. Application is using custom angular library which is also being migrated from version 7 to 10. this library has NgxFileDropModule which is imported as

(import { NgxFileDropModule } from 'ngx-file-drop';)

but the error is thrown in main application ERROR in Cannot resolve type entity i9.NgxFileDropModule to symbol How do I get rid of this issue P.s. library is compiled and built well but main application throws error which has dependency on library

Answer 1

I've had a similar problem while having the library locally sourced using file: package target. My solution was to set projects.PROJECTNAME.architect.build.options.preserveSymlinks to true.

e.g.

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
  "newProjectRoot": "projects",
  "projects": {
    "PROJECTNAME": {
      "projectType": "application",
      "schematics": {
        // ...
      },
      // ...
      "architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            // ...
            "scripts": [],
            "preserveSymlinks": true // <-- This line here
          }
          // Remaining configuration...