'Property doesn't exist' error with imported module in Svelte

I want to use big.js or decimal.js to perform accurate calculations of decimal numbers in my basic Svelte app. To test it, I have imported the module in my App.svelte file:

import Decimal from "../node_modules/decimal.js/decimal.mjs";
import Big from "../node_modules/big.js/big.mjs";

However, when I create a Big object and use its built-in functions, I get an error in my IDE (Visual Studio Code), but the code works as expected in the console:

let myNumber = 3.2;
let secondNumber = new Big(myNumber).div(2);

Error: Property 'div' does not exist on type 'Big'

How can I get my IDE to recognise imported objects from modules? To clarify, I am not using typescript.

Via Active questions tagged javascript - Stack Overflow https://ift.tt/R5uPKkB

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