20                 .then(res => res.json())

    20                 .then(res => res.json())

    21                 .then(this.spread_json_data);

    21                 .then(this.spread_json_data);

    22 

    22 

    23         }

    23         }

    24         dispatch(value, oldval, index) {

    24         dispatch(value, oldval, index) {

    26             this.cache[index] = value;

    25             this.cache[index] = value;

    27             this.do_http_request();

    26             this.do_http_request();

    28         }

    27         }

    29         on_click(evt) {

    28         on_click(evt) {

    30             this.do_http_request();

    29             this.do_http_request();