Javascript 如何从 function 返回值而不是通过返回

Question

I have method in Javascript:

function ServerSideDatasource(server) {
  return {
    getRows: function (params) {
      var response = server.getData(params.request).then((res) => {
        
        var result = {
          success: true,
          rows: res.rows,
          lastRow: getLastRowIndex(params.request, res.rows),
        };
   });
 }

Above method is called in TypeScript class:

    var datasource = ServerSideDatasource(getFiltersFromGrid);
    params.api.setServerSideDatasource(datasource);

From ServerSideDatasource I want to fetch number of rows. How to do that?

Answer 1

You returned the function, so:

datasource.getRows();

Also, in the getRows function, return the result.