Load more data problem

[Arnau-Gelonch]

With the new version of the setLoadDataCallback library it works differently than loadMoreData, and I don't understand how it works. Could someone show me an example of how to use the setLoadDataCallback function?

[char101]

Something like this

chart.setLoadDataCallback(({type, data, callback}) => {
  if (type === 'backward') {
    const timestamp = data.timestamp;
    const {result, more} = ...; // fetch data
    if (Array.isArray(result) && result.length) {
      callback(result, more);
    } else {
      callback([], false); // callback must be called even on empty data, otherwise it will stuck
    }
  } else { // forward
    // same with backward
  }
});