我使用primeng dataTable和虚拟滚动 . 当expandableRows为true时，虚拟滚动不起作用 . 并且只有在存在扩展行时才会调用lazyLoad函数 . 这是我的代码：
HTML：
<p-dataTable #dt [virtualScroll]="virtualScroll" [emptyMessage]="'TABLE.EMPTY_MESSAGE'|translate" #dt [rows]="rows" [paginator]="paginator"
(onLazyLoad)="loadLazy($event)" [pageLinks]="3" [scrollable]="true" loadingIcon="fa-spinner" [editable]="editable"
[styleClass]="paginator?'paginator': enableFilter?'scroll filter-table':'scroll'" [totalRecords]="virtualScroll?totalRecords:null"
[globalFilter]="gb" [value]="displayList1" [lazy]="virtualScroll" [loading]="loading" resizableColumns="true" [(selection)]="selectedItem"
(onRowDblclick)="importButton?'':onRowDblclick($event.data)" [expandableRows]="showExpander" [expandedRows]="expandedRows"
(onRowSelect)="onrowSelect($event)" (onRowClick)="selectRow($event);onrowSelect($event)" (onRowUnselect)="onRowUnSelect($event)"
[rowStyleClass]="rowStyleClass" [selectionMode]="(enableSelect&&!showSelectColumn)?(multiSelect?'multiple':'single'):''"
[metaKeySelection]="false" (onHeaderCheckboxToggle)="onHeaderCheckboxToggle($event)">
输入脚本：
loadLazy(event: LazyLoadEvent) {
if (this.dataTable && this.dataTable.el.nativeElement.querySelector(".ui-datatable-scrollable-body")&&this.dataTable.el.nativeElement.querySelector(".ui-datatable-scrollable-body").clientHeight) {
this.rows = Math.floor(this.dataTable.el.nativeElement.querySelector(".ui-datatable-scrollable-body").clientHeight / this.dataTable.tbody.children[0].clientHeight);}
this.filters = event.filters;
this.loading = true;
setTimeout(() => {
this.loading = false;
if (this.displayList) {
let list = this.displayList.filter(row => this.filterField(row, event.filters));
this.displayList1 = list.slice(event.first, (event.first + event.rows));
this.totalRecords = list.length;
}
}, 250);
}