import { LightningElement, wire, api, track} from 'lwc';import { refreshApex } from '@salesforce/apex';import getOpps from '@salesforce/apex/OpportunityController.getOpps';const columns = [{        label: 'Name',        fieldName: 'Name',        type: 'text',        sortable: true    },    {        label: 'Stage',        fieldName: 'StageName',        sortable: true    },    {        label: 'Close Date',        fieldName: 'CloseDate',        sortable: true    }];export default class LightningDatatableExample extends LightningElement {    @track value;    @track error;    @track data;    @api sortedDirection = 'asc';    @api sortedBy = 'Name';    @api searchKey = '';    result;        @track page = 1;     @track items = [];     @track data = [];     @track columns;     @track startingRecord = 1;    @track endingRecord = 0;     @track pageSize = 5;     @track totalRecountCount = 0;    @track totalPage = 0;      @wire(getOpps, {searchKey: '$searchKey', sortBy: '$sortedBy', sortDirection: '$sortedDirection'})    wiredAccounts({ error, data }) {        if (data) {                    this.items = data;            this.totalRecountCount = data.length;             this.totalPage = Math.ceil(this.totalRecountCount / this.pageSize);                         this.data = this.items.slice(0,this.pageSize);             this.endingRecord = this.pageSize;            this.columns = columns;            this.error = undefined;        } else if (error) {            this.error = error;            this.data = undefined;        }    }    //clicking on previous button this method will be called    previousHandler() {        if (this.page > 1) {            this.page = this.page - 1; //decrease page by 1            this.displayRecordPerPage(this.page);        }    }    //clicking on next button this method will be called    nextHandler() {        if((this.page this.totalRecountCount)                             ? this.totalRecountCount : this.endingRecord;         this.data = this.items.slice(this.startingRecord, this.endingRecord);        this.startingRecord = this.startingRecord + 1;    }            sortColumns( event ) {        this.sortedBy = event.detail.fieldName;        this.sortedDirection = event.detail.sortDirection;        return refreshApex(this.result);            }      handleKeyChange( event ) {        this.searchKey = event.target.value;        return refreshApex(this.result);    }}