Scrape weather conditions from whitewater website

whitewater.ts

import { JSDOM } from 'jsdom';
import fetch from "node-fetch";

export type WhitewaterConditions = {
    weather: string;
    overnightSnowCm: number;
    baseTempDegC: number;
}

const WEB_URL = 'https://skiwhitewater.com/conditions/';

function select(document: Document, selector: string): string {
    const el = document.querySelector(selector);
    if (!el) {
        throw new Error(`Element not found at ${selector}`);
    }
    const text = el.textContent;
    if (!text) {
        throw new Error(`No textContent at ${selector}`);
    }
    return text.trim();
}

export async function getWhitewaterConditions(): Promise<WhitewaterConditions> {
    const res = await fetch(WEB_URL)
    const text = await res.text();
    const dom = new JSDOM(text);
    const document = dom.window.document;

    return {
        weather: select(document, '.snow-summary__item--weather .snow-summary__desc'),
        overnightSnowCm: parseInt(select(document, '.snow-summary__item--overnight .snow-summary__desc .value')),
        baseTempDegC: parseInt(select(document, '.snow-summary__item--base .snow-summary__desc .value')),
    }
}

Example output:

{ weather: 'Snowing', overnightSnowCm: 2, baseTempDegC: -7 }