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How to Create a Tooltip in Lightning Datatable ?

Imagine you have a datatable displaying a list of Contact records, and one of the columns shows the Account Name. The Account Name is a hyperlink that allows users to navigate to the Account record page. But what if users want to take a quick glance at some key Account fields—like Phone or Address—without navigating to the Account record?

In Salesforce Classic, this was achieved using the Mini Page Layout feature from standard page. However, in Lightning Experience, we can implement a similar feature by adding a tooltip to the data table.

Solution Overview:

We’ll create a Lightning Web Component (LWC) that:

  1. Displays a data table with a clickable Account Name.
  2. Provides a tooltip that shows the Account's Phone and Address fields when users hover over the Account Name.

Implementation Steps:

1. Data Preparation

We need to retrieve the following fields for each Contact and its associated Account:

  • Contact Fields: Name, Phone, Email
  • Account Fields: Name, Phone, Billing Address

The data will be fetched using an Apex controller.

2. Data table Configuration

The Account Name column in the data table will be configured as a hyperlink using the url type. A tooltip will be added using the tooltip property.

3. Tooltip Implementation

The tooltip content will be dynamically set based on the Account's Phone and Address.


  

Apex Class : Retrieve list of contacts records.

/**
* @File Name : ContactsController.cls
* @Description :
* @Author : Asish Behera
* @Last Modified By :
* @Last Modified On : January 17, 2025
* @Modification Log :
*==============================================================================
* Ver | Date | Author | Modification
*==============================================================================
* 1.0 | January 17, 2025 |   | Initial Version
**/

public class ContactsController {
    @AuraEnabled(cacheable=true)
    public static List<Contact> getContacts(){
        return [SELECT Id,Name,Phone,Email,AccountId,Account.Name,Account.Phone,
Account.BillingStreet,Account.BillingCity,Account.BillingState,
Account.BillingpostalCode
                FROM Contact
                LIMIT 10 ];
    }
}

LWC Java Script Code

import { LightningElement,wire } from 'lwc';
import getContacts from '@salesforce/apex/ContactsController.getContacts';
const columns = [
    {label: 'Contact Name',fieldName:'Name',type:'Text'},
    {label: 'Phone',fieldName:'Phone',type:'phone'},
    {label: 'Email',fieldName:'Email',type:'email'},
    {
        label: 'Account Name',
        fieldName: 'AccountUrl', // The field containing the URL
        type: 'url', // Specifies the field type as a URL
        typeAttributes: {
            label: { fieldName: 'AccountName' }, // Specifies the visible label
            target: '_blank', // Opens the link in a new tab
            tooltip: { fieldName: 'accountToolTip' }, // Tooltip content
        },
    },
]
export default class ToolTipExample extends LightningElement {
contacts = [];
error
columns = columns;
    @wire(getContacts)
    wiredContacts({ error, data }) {
       if (data) {
            console.log('Data:', JSON.stringify(data));
            // Transform data for the datatable
            this.contacts = data.map((item) => ({
                ...item,
                AccountName: item.Account.Name, // Set Account Name
                AccountUrl: `/lightning/r/Account/${item.AccountId}/view`, // Create URL to Account
                accountToolTip: `Phone : ${item.Account.Phone}\nAddress : ${item.Account.BillingStreet},
${item.Account.BillingCity}, ${item.Account.BillingState}`,     // Tooltip text
            }));
            this.error = undefined;
        } else if (error) {
            this.error = error;
            this.contacts = undefined;
            console.log(' this.error==='+JSON.stringify( this.error));
        }
    }

   
}

LWC HTML Code
<template>
  <lightning-card title="Contacts Table With ToolTip">
     <lightning-datatable key-field="Id" data={contacts}
hide-checkbox-column columns={columns} >
    </lightning-datatable>
  </lightning-card>  
</template>

Keep Learning and Exploring !. If you have questions please fill free to add comments.


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