chiro-canto/public/upload/scripts/checkmap.js

let span = document.getElementById('latlng');
let coordinates = span.innerHTML;

lat = coordinates.split(",")[0];
lng = coordinates.split(",")[1];
let latlng = L.LatLng(lat, lng);
var mymap = L.map('checkmap').setView([lat, lng], 13);


L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
    attribution: '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
}).addTo(map);


let marker = L.marker([lat, lng], draggable = false).addTo(mymap);