Have done npm i --save-dev @types/jquery npm install --save jquery in 'tsconfig.app.json' added "compilerOptions": { .., "types": [ .., "jquery" ] } in 'angular.json' added "scripts": [ "node_modules/jquery/dist/jquery.js", .. ] for example i use it in declare var $: any; ngAfterViewInit(): void { const myCarousel = this._carousel.nativeElement; const carousel = (<any>$(myCarousel)).carousel(); } It is working but in the prompt of powershell where i've done 'ng serve' got a ERROR ReferenceError: $ is not defined Have tryed also to add import * as $ from 'jquery' but same result.. can anyone help me? Continue reading...