October 13, 2020

Drop Down Box or Combo Box to filter data in custom table using LWC in Salesforce

Sample Code:

HTML:

<template>
    <div class="slds-box slds-theme--default">
        <div class="slds-text-color_inverse slds-text-heading_large" style="padding:0.5rem;background:#16325c">        
            Accounts
        </div>
        <div style="width:200px; padding:0.5rem;">
            <lightning-combobox name="filter"
                                label="Status"
                                value={selectedValue}
                                variant="label-hidden"
                                options={options}
                                onchange={handleChange}
                                placeholder="Select Industry to filter"></lightning-combobox>
        </div>
        <table class="slds-table slds-table_cell-buffer slds-table_bordered slds-table_striped">
            <thead>
                <tr class="slds-line-height_reset">
                    <th class="" scope="col">
                        <a class="slds-th__action slds-text-link_reset" href="javascript:void(0);" role="button" tabindex="0" onclick={sortRecs} name="Name">
                            Account Name
                        </a>
                    </th>
                    <th class="" scope="col">
                        <a class="slds-th__action slds-text-link_reset" href="javascript:void(0);" role="button" tabindex="0" onclick={sortRecs} name="AccountNumber">
                            Account Number
                        </a>
                    </th>
                    <th class="" scope="col">
                        <a class="slds-th__action slds-text-link_reset" href="javascript:void(0);" role="button" tabindex="0" onclick={sortRecs} name="Industry">
                            Industry
                        </a>
                    </th>
                    <th class="" scope="col">
                        <a class="slds-th__action slds-text-link_reset" href="javascript:void(0);" role="button" tabindex="0" onclick={sortRecs} name="Rating">
                            Rating
                        </a>
                    </th>
                    <th class="" scope="col">
                        <a class="slds-th__action slds-text-link_reset" href="javascript:void(0);" role="button" tabindex="0" onclick={sortRecs} name="Type">
                            Type
                        </a>
                    </th>
                    <th class="" scope="col">
                        <a class="slds-th__action slds-text-link_reset" href="javascript:void(0);" role="button" tabindex="0" onclick={sortRecs} name="Phone">
                            Phone
                        </a>
                    </th>
                </tr>
            </thead>
            <tbody>
                <template iterator:it={records}>
                    <tr class="slds-hint-parent" key = {it.value.Id}>
                        <td data-label="Account Name">
                            <div class="slds-cell-wrap">{it.value.Name}</div>
                        </td>
                        <td data-label="Account Number">
                            <div class="slds-cell-wrap">{it.value.AccountNumber}</div>
                        </td>
                        <td data-label="Industry">
                            <div class="slds-cell-wrap">{it.value.Industry}</div>
                        </td>
                        <td data-label="Rating">
                            <div class="slds-cell-wrap">{it.value.Rating}</div>
                        </td>
                        <td data-label="Type">
                            <div class="slds-cell-wrap">{it.value.Type}</div>
                        </td>
                        <td data-label="Phone">
                            <div class="slds-cell-wrap">{it.value.Phone}</div>
                        </td>
                    </tr>
                </template>
            </tbody>
        </table>
    </div>
</template>

JavaScript:
import { LightningElement, wire } from 'lwc';
import fetchAccounts from '@salesforce/apex/AccountController.fetchAccounts';

export default class Sample extends LightningElement {

    records;
    sortedColumn;
    sortedDirection;
    selectedValue = 'All';

    get options() {
        return [
            { label: 'All', value: 'All' },
            { label: 'Apparel', value: 'Apparel' },
            { label: 'Biotechnology', value: 'Biotechnology' },
            { label: 'Construction', value: 'Construction' },
            { label: 'Consulting', value: 'Consulting' },
            { label: 'Energy', value: 'Energy' }
        ];
    }

    handleChange( event ) {

        this.selectedValue = event.detail.value;
        if ( this.selectedValue === 'All' )
            this.records = this.initialRecords;
        else
            this.filter();

    }

    @wire( fetchAccounts )  
    wiredAccount( { error, data } ) {

        if (data) {

            this.records = data;
            this.initialRecords = data;
            this.error = undefined;
            this.sortedColumn = "Name";
            this.sortRecs();

        } else if ( error ) {

            this.error = error;
            this.initialRecords = undefined;
            this.records = undefined;

        }

    }  

    sortRecs( event ) {

        let colName = event ? event.target.name : undefined;
        console.log( 'Column Name is ' + colName );

        if ( this.sortedColumn === colName )
            this.sortedDirection = ( this.sortedDirection === 'asc' ? 'desc' : 'asc' );
        else
            this.sortedDirection = 'asc';

        let isReverse = this.sortedDirection === 'asc' ? 1 : -1;

        if ( colName )
            this.sortedColumn = colName;
        else
            colName = this.sortedColumn;

        this.records = JSON.parse( JSON.stringify( this.records ) ).sort( ( a, b ) => {
            a = a[ colName ] ? a[ colName ].toLowerCase() : 'z';
            b = b[ colName ] ? b[ colName ].toLowerCase() : 'z';
            return a > b ? 1 * isReverse : -1 * isReverse;
        });

    }

    filter() {  
           
        if ( this.selectedValue ) {  

            this.records = this.initialRecords;
 
            if ( this.records ) {

                let recs = [];
                for ( let rec of this.records ) {

                    console.log( 'Rec is ' + JSON.stringify( rec ) );

                    if ( rec.Industry === this.selectedValue ) {

                        recs.push( rec );
                
                    }
                    
                }

                console.log( 'Recs are ' + JSON.stringify( recs ) );
                this.records = recs;

            }
 
        }  else {

            this.records = this.initialRecords;

        }
 
    }  

}

Apex Class:
public with sharing class AccountController {
 
    @AuraEnabled( cacheable = true )
    public static List< Account > fetchAccounts() {
     
        return [ SELECT Id, Name, Industry, AccountNumber, Rating, Type, Phone
                   FROM Account
                  LIMIT 10 ];
         
    }
     
}

Output:



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