Custom search functionality in Lightning Web Component(lwc)

This post explains how to implement custom search functionality in Lightning web components(lwc).

Example

Apex Class

public inherited sharing class LWCExampleController {

    @AuraEnabled(Cacheable = true)
    public static list<Account> retriveAccs(String strAccName) {
        strAccName = '%' + strAccName + '%';
        list<Account> lstAccs = [SELECT  Id, Name, Industry, Phone, Type From Account WHERE Name LIKE :strAccName];

        if(lstAccs.isEmpty()) {
            throw new AuraHandledException('No Record Found..');
        }
        return lstAccs; 
    }
} 

CustomSearchInLWC.html

<template>
    <lightning-card title="Custom Search Functionality in LWC" icon-name="standard:account">
        <div if:true={errorMsg} style="margin-left: 3%;">
            <p style="color: red;">{errorMsg}</p>
        </div>

        <lightning-layout multiple-rows="true" vertical-align="end">
            <lightning-layout-item size="12" small-device-size="10" medium-device-size="8" large-device-size="6" padding="around-small">
                    <div class="slds-form-element">
                            <div class="slds-form-element__control">
                                    <lightning-input type="text" 
                                                     label="Enter Account Name" 
                                                     onchange={handleAccountName} ></lightning-input>
                            </div>
                        </div> 
            </lightning-layout-item>
            <lightning-layout-item size="12" small-device-size="2" medium-device-size="2" large-device-size="2" padding="around-small">
                    <lightning-button label="Search" 
                                      variant="brand" 
                                      onclick={handleSearch}></lightning-button>
                </lightning-layout-item>
            </lightning-layout><br/>

        <div if:true={searchData}>
            <lightning-datatable data={searchData} 
                                 columns={columns} 
                                 key-field="id"
                                 hide-checkbox-column="true"></lightning-datatable>
        </div>
    </lightning-card>

</template>

CustomSearchInLWC.js

import { LightningElement, track } from 'lwc';
import serachAccs from '@salesforce/apex/LWCExampleController.retriveAccs';

// datatable columns
const columns = [
    {
        label: 'Name',
        fieldName: 'AccName',
        type: 'url',
        typeAttributes: {label: { fieldName: 'Name' }, target: '_blank'}
    }, {
        label: 'Industry',
        fieldName: 'Industry',
    }, {
        label: 'Phone',
        fieldName: 'Phone',
        type: 'phone',
    }, {
        label: 'Type',
        fieldName: 'Type',
        type: 'text'
    },
];
export default class CustomSearchInLWC extends LightningElement {
    @track searchData;
    @track columns = columns;
    @track errorMsg = '';
    strSearchAccName = '';
    

    handleAccountName(event) {
        this.strSearchAccName = event.detail.value;
    }

    handleSearch() {
        if(!this.strSearchAccName) {
            this.errorMsg = 'Please enter account name to search.';
            this.searchData = undefined;
            return;
        }

        serachAccs({strAccName : this.strSearchAccName})
        .then(result => {
            result.forEach((record) => {
                record.AccName = '/' + record.Id;
            });

            this.searchData = result;
            
        })
        .catch(error => {
            this.searchData = undefined;
            window.console.log('error =====> '+JSON.stringify(error));
            if(error) {
                this.errorMsg = error.body.message;
            }
        }) 
    }

}

CustomSearchInLEC.js-meta.xml

<?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata" fqn="CustomSearchInLWC">
    <apiVersion>46.0</apiVersion>
    <isExposed>true</isExposed>
    <targets>
        <target>lightning__AppPage</target>
        <target>lightning__RecordPage</target>
        <target>lightning__HomePage</target>
    </targets>
</LightningComponentBundle>

Output