MediaWiki:Common.js

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console.log("Common.js loaded");

// Watch for dynamically inserted form fields
const observer = new MutationObserver(() => {
    const addr = document.querySelector('input[name="address"]');
    if (addr) {
        console.log("Address field detected!");

        // Stop observing once found
        observer.disconnect();

        const lat = document.querySelector('input[name="latitude"]');
        const lon = document.querySelector('input[name="longitude"]');

        // Attach geocoding
        addr.addEventListener('change', () => {
            const q = encodeURIComponent(addr.value);
            if (!q) return;

            const url = 'https://nominatim.openstreetmap.org/search?format=json&q=' + q;

            fetch(url)
                .then(r => r.json())
                .then(data => {
                    if (data && data.length > 0) {
                        lat.value = data[0].lat;
                        lon.value = data[0].lon;
                    }
                });
        });
    }
});

// Start observing the whole document
observer.observe(document.body, { childList: true, subtree: true });