crux-lookup/lib/commands/singleCommand.js

A simple CLI utility for grabbing URL-/origin-level Core Web Vitals using the Chrome User Experience Report (CrUX) API

import { singleLookup } from '../utils/cruxUtil.js';
import { transformCrUXData } from '../utils/cruxUtil.js';
import paintHistograms from '../utils/histogramUtil.js';
import ora from 'ora';
import fs from 'fs';
export const singleCommand = (url, options) => {
    const spinner = ora(`Looking up ${url}`).start();
    singleLookup(url, options.origin)
        .then((data) => {
        if (options.output) {
            spinner.text = `Saving results for ${url} to ${options.output}`;
            fs.writeFile(options.output, JSON.stringify(data, null, 2), (err) => {
                if (err) {
                    spinner.fail(`Error saving results for ${url} to ${options.output}\n${err}`);
                }
                else {
                    spinner.succeed(`Saved ${url} to ${options.output}`);
                }
            });
        }
        else if (options.json) {
            spinner.succeed(`Found this for ${options.origin ? 'origin' : ''} ${url}:\n${JSON.stringify(data, null, 2)}`);
        }
        else {
            const transformedCrUXData = transformCrUXData(data);
            spinner.succeed(`Found this for ${options.origin ? 'origin' : ''} ${url}:`);
            paintHistograms(transformedCrUXData);
        }
    })
        .catch((err) => {
        spinner.fail(`Error retrieving CrUX data for ${url}\n${err}`);
    });
};