const request = ( url, params = {}, method = 'GET' ) => { let options = { method }; if ( 'GET' === method ) { url += '?' + ( new URLSearchParams( params ) ).toString(); } else { options.body = JSON.stringify( params ); } return fetch( url, options ).then( response => response.json() ); }; const get = ( url, params ) => request( url, params, 'GET' ); // SQL test function sendata(naam, score) { get( 'http://oege.ie.hva.nl/~hossan/GetData.php', { naam: naam, score: score } ) .then( response => { // Do something with response. } ); }