Using react-virtualized InfiniteLoader - reactjs

Question

Does react-virtualized's InfiniteLoader require seed data to function? The following is my component:
class Bookmarks extends PureComponent {
constructor(props) {
super(props);
this.loaded = {
cursor: null,
data: []
};
this._isRowLoaded = this._isRowLoaded.bind(this);
this._loadMoreRows = this._loadMoreRows.bind(this);
this._rowRenderer = this._rowRenderer.bind(this);
}
render() {
const size = this.loaded.data.length;
return (
<InfiniteLoader
isRowLoaded={this._isRowLoaded}
loadMoreRows={this._loadMoreRows}
rowCount={size}>
{({onRowsRendered, registerChild}) =>
<AutoSizer>
{({width, height}) =>
<List
ref={registerChild}
height={height}
onRowsRendered={onRowsRendered}
rowCount={size}
rowHeight={30}
rowRenderer={this._rowRenderer}
width={width}
/>}
</AutoSizer>}
</InfiniteLoader>
);
}
_isRowLoaded({index}) {
return !!this.loaded.data[index];
}
_loadMoreRows({startIndex, stopIndex}) {
fetch('/api/bookmarks').then((response) => {
return response.json();
}).then((json) => {
this.loaded = {
cursor: json.cursor,
data: this.loaded.data.push(...json.data),
};
});
}
_rowRenderer({index, key, style}) {
return (
<div key={key} style={style}>{this.loaded.data[index]}</div>
);
}
}
In render(), size is initially zero as there's no data yet, and I assume the component would call _loadMoreRows—apparently not.
This is what I thought to be the flow of logic (which is incorrect):
Component is created
_loadMoreRows is called (1st time)
When the promise returned by _loadMoreRows is resolved, check each loaded rows with _isRowLoaded
Render each row

Answer 1

In render(), size is initially zero as there's no data yet, and I assume the component would call _loadMoreRows
This is the key to the misunderstanding. InfiniteLoader needs to know if there is more data to potentially load. The docs have a couple of simple recipes for working with InfiniteLoader:
If you know the total number of remote records then look at this example.
If you only know if there's at least 1 more record/page to be loaded,
look at this example.