heli-agri/lib/uri.js

HeliAgri is a high-performance, feature-packed library for creating interactive maps on the web. It can display map tiles, vector data and markers loaded from any source on any web page. OpenLayers has been developed to further the use of geographic infor

/**
 * @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;
}