/** * @module ol/uri */ /** * Appends query parameters to a URI. * * @param {string} uri The original URI, which may already have query data. * @param {!Object} params An object where keys are URI-encoded parameter keys, * and the values are arbitrary types or arrays. * @return {string} The new URI. */ export function appendParams(uri, params) { const keyParams = []; // Skip any null or undefined parameter values Object.keys(params).forEach(function (k) { if (params[k] !== null && params[k] !== undefined) { keyParams.push(k + '=' + encodeURIComponent(params[k])); } }); const qs = keyParams.join('&'); // remove any trailing ? or & uri = uri.replace(/[?&]$/, ''); // append ? or & depending on whether uri has existing parameters uri += uri.includes('?') ? '&' : '?'; return uri + qs; }