Building Extensions #15: Creating widgets with the JS SDK bundle in Zoho Desk—Inter-widget communication

Building Extensions #15: Creating widgets with the JS SDK bundle in Zoho Desk—Inter-widget communication

This series aims to equip developers with all they need to build extensions for Zoho Desk in Zoho Sigma and publish them in Zoho Marketplace.

Hello Developers!

In our previous post, we briefed the use of Hooks API and explained it with an example on how to use them in a Desk extension. In this post, we'll learn about the inter-widget communication feature and how it can be used in your extensions with an example.

Inter-widget communication

There are scenarios where an extension could have multiple widgets. In such cases, it is important to have communication between these widgets for the extension to be more user-friendly. The inter-widget communication feature of Zoho Desk helps you create a connection between widgets and facilitate communication between them. When two widgets are communicating, there are a few points to remember during implementation. Let’s consider one widget as the sender and the other as the receiver.

Sender widget
  1. This widget should know the receiving widget's identity.
  2. When it knows that identity, it can send the desired data to the receiving widget.
Receiving widget
  1. This widget needs to be active to receive data from any sender.
  2. It can then process the received data.
You can achieve this with the help of a couple of SDK methods provided by the Zoho developer platform.
  1. App.instance.getWidgets(): The getWidgets() method will return an array of all the widgets available in the extension, including the one from where this call is made.
  2. siblingwidgetId: Every widget associated to the extension will have a unique ID. You can use the code widgets[0].widgetID to get the widget ID of the desired widget from the array of widgets available. The array index for the widget is defined based on the order in which the widgets are listed in the plugin-manifest file of the extension.
  3. var siblingWidget = App.instance.getWidgetInstance(siblingwidgetId): This returns the whole instance of the selected widget.
  4. siblingWidget.emit('event', data): This sends the data from the selected widget on the event occurrence.
Once we pass the data from the first widget (sender), we need to enable the other widget (receiver) to receive the event sent from the first widget. The following code snippet needs to listen to an event emitted by the sibling widget.

App.instance.on('event', function(data){});

Sender Widget
Receiving Widget
Need to know the receiving widget's IdentityNeed to be active to receive the data
Get the instance of the desired widgetReceive data and process it as required
Send the data

Let’s learn about inter-widget communication with an example.

Scenario

Consider a scenario where an agent is provided with detailed information about a particular customer within Zoho Desk itself that is easily accessible. Wouldn’t it be useful for the agents to understand the value of their customer easily? Yes, this can be done using an extension.
  1. Fetch the details of the customer from Zoho CRM.
  2. Showcase the required customer’s information in Zoho Desk.

Platform features

To implement the above scenario, the following Desk platform features are used.
  1. Background widget: This widget runs on its own in the background by default. In our use case, as soon as an agent opens a ticket, the customer's email ID needs to be fetched and the corresponding details are imported from Zoho CRM accordingly. In this case, we can use the background widget feature to fetch the data from Zoho CRM. This can be implemented using the background widget.
  2. Tickets subtab widget: In our example use case, we need the customer’s details to be shown to the agent. Let’s choose the ticket's subtab location to display the same.
  3. Inter-widget communication: Because there are two widgets being used, we can use the inter-widget communication feature for a seamless data flow between the two widgets.

Subtab widget

An agent opens a ticket. Now the background widget gets loaded by default. When the agent moves to the subtab widget to view the customer details, the subtab widget is loaded and we communicate to the background widget about the same. The customer data transferred to the subtab widget will be displayed to the agent.


Background widget

As soon as the background widget gets a communication from the subtab widget, the customer's details are fetched and transmitted back to the subtab widget.





We have attached the entire code of our sample in this post. You can download the same and reuse, if required.

Sample output



Hope you found this post to be useful. Stay tuned for more posts in this space!

See Also



      • Recent Topics

      • Custom Search using HTM+CSS Snippet

        Suppose I wanted to create my own list view using HTML and CSS snippets inside a Page with a custom search input at the top of the list (not the Search snippet). Without Javascript, is there a way to retrieve a user's entry from that search input and

      • Mass Update of Lookup Fields not possible

        Hello List I've created a custom field for Leads and Contacts 'Current Campaign'. This is very Handy as I can filter leads and then related them to a campaign. Everything ready, but then I realized that mass update doesn't work for lookup fields... a

      • Zoho CRM Kiosk Upload Files

        Hello all, We are trying out Kiosks at the moment to see where it can fit best in our business. We are still a bit off in the application but lets say we will sort this out. My question is the following - when I create a Kiosk I can add "File Upload"

      • Double opt-in notifications and customizable confirmation messages for your webforms

        Dear CRM Community, We are excited to announce a major upgrade to our Webforms feature. You can now customize the confirmation message shown to your users who double opt-in from your webform and also customize your confirmation emails when they submit

      • Has Anyone successfully integrated Zoho and Sage Intact?

        Hey all, We’re evaluating Zoho One + Sage Intacct and I’m trying to connect with anyone who has actually implemented the two together.Specifically, I’d love to know: -- Which functions you kept in Zoho vs. Intacct (e.g., Product Catalog, AR/AP, invoicing,

      • Introducing Image Upload Field

        Hello everyone, In this post we will discuss about the benefits and usage of the Image upload field. The field is available for standard and custom modules.  Usage: This field can be used to upload a gallery of images to a record and share the record with peers or customers. The record can be made accessible to users outside of Zoho CRM via Portals, where they can upload the necessary images. Preview, editing, and deleting images: The uploaded images can be directly edited and saved from the record

      • Trigger a Workflow Function if an Attachment (Related List) has been added

        Hello, I have a Case Module with a related list which is Attachment. I want to trigger a workflow if I added an attachment. I've seen some topics about this in zoho community that was posted few months ago and based on the answers, there is no trigger

      • Free webinar alert on November 19 - Email driven strategies - Master personality based styles

        Hello Zoho Community! Want to make email management easier, smarter, and more you? We’ve got just the session for you! Join our interactive, game-based webinar to discover how Zoho Mail adapts to your personality and work style. Learn practical hacks,

      • AI generated meeting notes associated to Account or Deal

        As our organization works to improve efficiency we are looking for a solution to leverage AI to generate meeting notes and then add those notes to a CRM record such as an Account or Deal. I see Zoho has a Notebook AI offering that talks about the ability

      • due date on cheue

        how to handle cheque in zoho books for customers and vendors including due date

      • Zoho CRM Portal Field Level Permission Issue

        Hi Support Team, I am using the Zoho CRM Portal and configuring field-level editing permissions. However, we are unable to restrict portal users from editing certain fields. We have created a portal and provided View and Edit (Shared Only) access for

      • 'Statement of Accounts does not exist' error received, when creating PO using api in Zoho Inventory

        Here is request json -- JSONString = { "date": "2019-09-24", "purchaseorder_number": "PO-6-1", "delivery_date": null, "delivery_org_address_id": 36221200000056XXX, "vendor_id": 362212000000564XXX, "attention": "Testing", "line_items": [{ "unit": "Pieces", "account_id": 36221200000003XXX, "quantity": 1, "item_id": 362212000000049XXX, "tax_type": "", "tax_name": "", "name": "One HD", "purchase_rate": 85, "tax_percentage": 0, "item_total": 85.00, "tax_id": "", "warehouse_id": 362212000000564XXX }] }

      • Zoho Projects API 100 requests/2 min. Limit

        Hi Requesting clarification on the API documentation. "You can invoke or call an API for 100 times in a span of two minutes. If you invoke more than 100 times, the particular API request will be locked for the next 30 minutes. " Does this limit apply

      • Integrate your Outlook/ Office 365 inbox with Zoho CRM via Graph API

        Hello folks, In addition to the existing IMAP and POP options, you can now integrate your Outlook/Office 365 inbox with Zoho CRM via Graph API. Why did we add this option? Microsoft Graph API offers a single endpoint to access data from across Microsoft’s

      • Zoho Projects - Attachments added to Task and Bug emails are not saved

        Hi Projects team, I have been experimenting with emails into projects to create tasks and bugs. I have noticed that attachments added to the emails are not saved to the task or bug. Is this normal behaviour? Thanks, Ashley

      • Zoho Inventory's latest shipping integration updates at a glance.

        Hello Users, We would like to share some important news about our latest improvements in the Shipping integration capabilities of Zoho Inventory that we achieved in 2024 with some of our major integration partners in key editions across APAC, North America,

      • Sorting a list of record acquired from the zoho.crm.searchRecords function.

        This is something for which I'm trying to figure out a straightforward way to do. The searchRecords does a great job fetching me the records that I want. However, in some cases, where it returns multiple records, I want it to sort the returned list by date of creation of that record, so that when I do records.get(0), I get the most recent record.  As an example, here's my sample pseudo code: records = zoho.crm.searchRecords("Clients", "Office_Number:equals:123456"); Now the "records" list above contains

      • Zoho Inventory Custom Field Update

        Hello All, In this post I am describing how can we Update the Custom Field Value in Zoho Inventory. // Get Org ID orgid = organization.get("organization_id"); // Field Value resvp = ifnull(item.get("purchase_rate"),null); // Record ID iid = item.get("item_id");

      • Deprecation of the Zoho OAuth connector

        Hello everyone, At Zoho, we continuously evaluate our integrations to ensure they meet the highest standards of security, reliability, and compliance. As part of these ongoing efforts, we've made the decision to deprecate the Zoho OAuth default connector

      • Alphabetically

        How can i arrange alphabetically - (Manage Manufacturer) Field in Item Master 

      • Can i set a default value for country and state in address field in zoho creator?

        Can i set a default value for country and state in address field in zoho creator?

      • Convert HTML to PDF & Send as Email Attachments in Zoho Creator (Deluge)

        This approach is useful for sending welcome letters, instructions, or promotional offers after order creation. // 1. Define the variables using the submitted input customerName = input.Customer_Name1; orderID = input.ID; customerEmail = input.Email_Address; //

      • Redirect after submission is not working after a few submission

        I have setup redirect url correctly and everything works as expected. However, it seems that there's a limit to the number of submissions before the redirect stops working. After the "limit" is reached, the page redirects to a seemingly zoho hosted page,

      • Enhancement Request for Multi-Asset Work Order Feature

        Hello Latha, Thank you for your continued support. The multi-asset Work Order feature is extremely helpful. I did some testing based on our requirements, and during the process, I noticed a few areas where we need your team’s support to improve the feature

      • Marketing Tip #8: Run limited-time offers

        Exclusive offers that don't last long make shoppers purchase right away instead of waiting. Run a flash sale or limited-time discount to convert interest into sales. Try this today: Set up a "Buy X Get Y" coupon in Zoho Commerce valid for a limited time

      • Add Option to Mass Dispatch by User

        Hello! We are using the dispatch console to dispatch service appointments to our service ressources. Right now, the process is our dispatcher verifies each ressource's route for the day and dispatches it after validation. Sadly, there doesn't seem to

      • Zoho Projects - Email notification relabelling of modules not present on default templates

        Hi Projects Team, I noticed that in the default email template notification, the word "bug" was not renamed to the lable I am using in my system. As many users may used the Bugs modules for various purposes including Changes, Revisions, Issues, etc...

      • Include the "Added Email ID" to the Filters of a Report

        Hi, With a Report and lots of entries, a normal thing is to filter entries by the submitter, but that is not included in the Auto Filter of Reports and you can't add a custom filter to a Report without specifying the actual value. I would like to be able

      • Loops in Deluge

        Hi, Can someone tell me how I do a simple loop in deluge? For example, if i have a variable "X" containing a number of loops to perform, i would like to perform an action X amount of times. X = 10; do while (Y < X){       // ... do something } to further explain, the equivalent in PHP of what i am trying to acheive would be: $X = 20; for($Y = 1; $Y < $X; $Y++ ){       // ... do something } Thanks

      • I am facing a problem with an if-else condition

        If I use if, else if, and else conditions in Deluge with the same variable name, sometimes the variable causes an error because the same variable name is present in every block

      • Zoho Projects - Reply by email to @ mentions posted on the Feed.

        When mentioning someone on the Feed (Status), it would be great if that mentioned person could reply to the email notification to update the Feed thread.

      • Record Overseas Transactions Along with CC charges

        Hi All, We receive payments via stripe in multiple currencies and stripe takes around 2.5% fees. The amount is settled in INR into our local bank. What should be the currency of the income account used for Stripe payments? Here is a sample flow that we

      • Product Updates in Zoho Workplace applications | October 2025

        Hello Workplace Community, Let’s take a look at the new features and enhancements that went live across all Workplace applications this October. Zoho Mail Create Signature from Compose window You can now effortlessly create a Signature using the Create

      • Subform data to Sheets

        I have been trying to setup a Zoho Flow automation to bring any Subform input to a Zoho Sheets but it seems impossible to post the subform entries to a Zoho Sheet. Is there any way to do it via Zoho Sheet API? https://www.zoho.com/sheet/help/api/v2/#CONTENT-Insert-row-with-JSON-data

      • Edit Contact Roles in the Potentials Mod

        New to ZOHO so I need some help. I work the same people on different projects concurrency. Their contact info remains the same but their role changes from project to project. In the Potential Mod you can pick contacts and assign a Role to them. I know

      • Is there a way to disable the Activity Reminders Pop-Up Window every time I log in?

        Just wondering if there is a setting to disable the window from opening every time I open my CRM? Thanks Chris

      • Hide fields only for creation

        Hello, I'd like to hide some fields only during the creation of a contact in Zoho CRM. In fact I have some fields that are automatically calculated thanks to an automation, so when my users create a contact I don't want them to fill those fields. I know

      • Rich-text fields in Zoho CRM

        Hello everyone, We're thrilled to announce an important enhancement that will significantly enhance the readability and formatting capabilities of your information: rich text options for multi-line fields. With this update, you can now enjoy a more versatile

      • Font Size 11 - Zoho CRM Email Templates

        Our company communicates with our vendors exclusively using Calibri Font Size 11, as this is the standard formatting for professional emails. Since the CRM only allows for the selection of font sizes 10 & 12, we have been unable to utilize the CRM email

      • Error 400 Booking

        Added a custom domain to Booking. Am Getting a SSL Error that has some other domain on the SSL and giving a 400 error. Followed instructions and it stated it verified our domain.. However it is not working. Please Help!

      • Next Page