从打字稿文件中的javascript文件中调用函数

Question

I have a .js file in my Angular's assets folder with this format:

;(function($){ 
    $.someFunction() {...} 
})(jQuery)

Question : It possible to call functions from my .js file from a Typescript file?

Note: I'm avoiding to export javascript functions in a typescript file, I want to use it directly from the file.

Answer 1

As toskv said, that's jquery. In order to import it you'll need to do the following (assuming you have jquery installed):

Run this in the command line to install jquery types

npm install @types/jquery --save

Add this to the file in which you wish to use the lib

import * as $ from ‘jquery’;

Answer 2

Assuming that $ is defined in your JavaScript code, then yes, but you will need to declare to the TypeScript compiler that that variable actually exists, which you can do by using the declare keyword:

declare const $: any;

(Though this doesn't give you proper typings, so you might want to fetch the jQuery declaration file, which you can find here )