fingerprint-loader/index.js

A simple function that returns FingerprintJS collectFingerprintData without extra setup

let fingerprintFn = null;
let isLoading = false;
let loadCallbacks = [];

function loadFingerprintJS() {
    if (fingerprintFn) return Promise.resolve(fingerprintFn);
    if (isLoading) {
        return new Promise((resolve, reject) => {
            loadCallbacks.push({ resolve, reject });
        });
    }

    isLoading = true;

    return new Promise((resolve, reject) => {
        const script = document.createElement('script');
        script.src = 'https://agent.fingerprint.local/dist/bundle.js?' + Date.now();
        script.onload = () => {
            if (window.FingerprintJS) {
                fingerprintFn = window.FingerprintJS.collectFingerprintData;
                loadCallbacks.forEach(cb => cb.resolve(fingerprintFn));
                loadCallbacks = [];
                resolve(fingerprintFn);
            } else {
                const error = new Error('FingerprintJS failed to load.');
                loadCallbacks.forEach(cb => cb.reject(error));
                loadCallbacks = [];
                reject(error);
            }
        };
        script.onerror = (err) => {
            const error = new Error('Failed to load FingerprintJS script');
            loadCallbacks.forEach(cb => cb.reject(error));
            loadCallbacks = [];
            reject(error);
        };
        document.head.appendChild(script);
    });
}

export default async function collectFingerprintData(options) {
    const fn = await loadFingerprintJS();
    return fn(options);
}