How do I include flex-layout?

Question

I am trying to add flex-layout to an angular app, but when I do and try to use it the app breaks. I have installed

npm i @angular/flex-layout @angular/cdk

then imported in app.module.ts

import { FlexLayoutModule } from '@angular/flex-layout';

import [ FlexLayoutModule ]

I've also upgraded typescript to the latest

npm i typescript@latest

But when the app tries to compile, I get all kinds of errors:

ERROR in node_modules/@angular/flex-layout/core/typings/base/base2.d.ts:24:19 - error TS1086: An accessor cannot be declared in an ambient context.

24     protected get parentElement(): HTMLElement | null;
                 ~~~~~~~~~~~~~
node_modules/@angular/flex-layout/core/typings/base/base2.d.ts:26:19 - error TS1086: An accessor cannot be declared in an ambient context.

26     protected get nativeElement(): HTMLElement;
                 ~~~~~~~~~~~~~
node_modules/@angular/flex-layout/core/typings/base/base2.d.ts:28:9 - error TS1086: An accessor cannot be declared in an ambient context.

28     get activatedValue(): string;
       ~~~~~~~~~~~~~~
node_modules/@angular/flex-layout/core/typings/base/base2.d.ts:29:9 - error TS1086: An accessor cannot be declared in an ambient context.

29     set activatedValue(value: string);
       ~~~~~~~~~~~~~~
node_modules/@angular/flex-layout/core/typings/breakpoints/break-point-registry.d.ts:20:9 - error TS1086: An accessor cannot be declared in an ambient context.

20     get overlappings(): BreakPoint[];
       ~~~~~~~~~~~~
node_modules/@angular/flex-layout/core/typings/breakpoints/break-point-registry.d.ts:24:9 - error TS1086: An accessor cannot be declared in an ambient context.

and the list goes on. Do I have a version mismatch of something?

Answer 1

1. Change version of flex-layout compatible with Angular 8. update angular.json

"@angular/flex-layout": "^8.0.0-beta.27"

2. install this update

npm install

To avoid this error update tsconfig.json (Not recommended)

"compilerOptions": {
   "skipLibCheck":true
}

Answer 2

It's because you are on Angular 8 but the library required Angular 9. In your package.json use this version : "@angular/flex-layout": "^8.0.0-beta.27"

Answer 3

Try to add tslib in dependencies

npm install --save tslib

Edit

If you are using Angular v8 then use v8 for flex-layout cause v9 need Angular v9.