[BUG] Angular 9 support?

🐛 Bug Report

After updating my angular application to v9, I’m getting the following errors:

ERROR in node_modules/exceljs/index.d.ts:1284:22 - error TS2307: Cannot find module 'stream'.

1284  read(stream: import('stream').Stream): Promise<Workbook>;
                          ~~~~~~~~
node_modules/exceljs/index.d.ts:1310:23 - error TS2307: Cannot find module 'stream'.

1310  write(stream: import('stream').Stream, options?: Partial<XlsxWriteOptions>): Promise<void>;
                           ~~~~~~~~
node_modules/exceljs/index.d.ts:1332:22 - error TS2307: Cannot find module 'stream'.

1332  read(stream: import('stream').Stream, options?: Partial<CsvReadOptions>): Promise<Worksheet>;
                          ~~~~~~~~
node_modules/exceljs/index.d.ts:1352:23 - error TS2307: Cannot find module 'stream'.

1352  write(stream: import('stream').Stream, options?: Partial<CsvWriteOptions>): Promise<void>;
                           ~~~~~~~~
node_modules/exceljs/index.d.ts:1649:19 - error TS2307: Cannot find module 'stream'.

1649            stream: import('stream').Stream;

Lib version: X.Y.Z

Steps To Reproduce

1. Just update the angular application to version 9.

My current application dependencies:

  "dependencies": {
    "@angular/animations": "^9.0.4",
    "@angular/cdk": "^9.1.0",
    "@angular/common": "^9.0.4",
    "@angular/compiler": "^9.0.4",
    "@angular/core": "^9.0.4",
    "@angular/forms": "^9.0.4",
    "@angular/http": "^7.2.16",
    "@angular/material": "^9.1.0",
    "@angular/platform-browser": "^9.0.4",
    "@angular/platform-browser-dynamic": "^9.0.4",
    "@angular/router": "^9.0.4",
    "@asymmetrik/angular2-leaflet": "^2.2.1",
    "@auth0/angular-jwt": "^4.0.0",
    "@ngx-lite/input-switch": "^0.3.3",
    "@types/geojson": "^7946.0.7",
    "@types/leaflet": "^1.5.9",
    "ag-grid-angular": "^22.1.1",
    "ag-grid-community": "^22.1.1",
    "angular2-jwt": "0.2.3",
    "angular2-multiselect-dropdown": "^4.6.3",
    "bootstrap": "^4.4.1",
    "chart.js": "^2.9.3",
    "chartjs-plugin-annotation": "^0.5.7",
    "chartjs-plugin-labels": "^1.1.0",
    "chartjs-plugin-title-click": "^1.0.0",
    "core-js": "^3.6.4",
    "exceljs": "^3.8.0",
    "file-saver": "^2.0.2",
    "jquery": "^3.4.1",
    "leaflet": "^1.3.4",
    "leaflet-extra-markers": "^1.2.1",
    "ng2-charts": "^2.3.0",
    "ng2-sticky-nav": "^6.1.0",
    "ngx-bootstrap": "^5.3.2",
    "ngx-mat-select-search": "^2.1.1",
    "ngx-pagination": "^5.0.0",
    "ngx-toggle-switch": "^2.0.5",
    "node-sass": "^4.13.1",
    "rxjs": "^6.5.4",
    "xlsx": "^0.15.5",
    "zone.js": "^0.10.2"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "^0.900.4",
    "@angular/cli": "^9.0.4",
    "@angular/compiler-cli": "^9.0.4",
    "@angular/language-service": "^9.0.4",
    "@types/jasmine": "^3.5.7",
    "@types/jasminewd2": "^2.0.8",
    "@types/node": "^13.7.6",
    "codelyzer": "^5.2.1",
    "jasmine-core": "^3.5.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "^4.4.1",
    "karma-chrome-launcher": "^3.1.0",
    "karma-coverage-istanbul-reporter": "^2.1.1",
    "karma-jasmine": "^3.1.1",
    "karma-jasmine-html-reporter": "^1.5.2",
    "protractor": "^5.4.3",
    "ts-node": "^8.6.2",
    "tslint": "^6.0.0",
    "typescript": "~3.7.5"
  }

[csudarshan259]

“types”: [“node”]. Add this to tsconfig.app.json file. Worked for me.

[omurbekjk]

I added paths in tsconfig.app.json

{
  "compileOnSave": false,
  "compilerOptions": {
  ...
    "paths": {
      "exceljs": [
        "node_modules/exceljs/dist/exceljs.js"
      ]
    }
  },
  "angularCompilerOptions": {
    "fullTemplateTypeCheck": true,
    "strictInjectionParameters": true
  }
}