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



    Access your files securely from anywhere







                            Zoho Developer Community




                                                  • Desk Community Learning Series


                                                  • Digest


                                                  • Functions


                                                  • Meetups


                                                  • Kbase


                                                  • Resources


                                                  • Glossary


                                                  • Desk Marketplace


                                                  • MVP Corner


                                                  • Word of the Day


                                                  • Ask the Experts





                                                            Manage your brands on social media



                                                                  Zoho TeamInbox Resources



                                                                      Zoho CRM Plus Resources

                                                                        Zoho Books Resources


                                                                          Zoho Subscriptions Resources

                                                                            Zoho Projects Resources


                                                                              Zoho Sprints Resources


                                                                                Qntrl Resources


                                                                                  Zoho Creator Resources



                                                                                      Zoho CRM Resources

                                                                                      • CRM Community Learning Series

                                                                                        CRM Community Learning Series


                                                                                      • Kaizen

                                                                                        Kaizen

                                                                                      • Functions

                                                                                        Functions

                                                                                      • Meetups

                                                                                        Meetups

                                                                                      • Kbase

                                                                                        Kbase

                                                                                      • Resources

                                                                                        Resources

                                                                                      • Digest

                                                                                        Digest

                                                                                      • CRM Marketplace

                                                                                        CRM Marketplace

                                                                                      • MVP Corner

                                                                                        MVP Corner









                                                                                          Design. Discuss. Deliver.

                                                                                          Create visually engaging stories with Zoho Show.

                                                                                          Get Started Now


                                                                                            Zoho Show Resources

                                                                                              Zoho Writer

                                                                                              Get Started. Write Away!

                                                                                              Writer is a powerful online word processor, designed for collaborative work.

                                                                                                Zoho CRM コンテンツ



                                                                                                  Nederlandse Hulpbronnen


                                                                                                      ご検討中の方




                                                                                                              • Recent Topics

                                                                                                              • Kaizen #227 : Client Script Support for List Page (Canvas)

                                                                                                                Hello everyone! Welcome to another week of Kaizen. In today's post lets see how Client Script can be used in Canvas List Page to mask sensitive information from specific roles and add colors to Canvas List Page records based on custom criteria.This use
                                                                                                              • Implement Date-Time-Based Triggers in Zoho Desk

                                                                                                                Dear Zoho Desk Support Team, We are writing to request a new feature that would allow for the creation of workflows triggered by specific date-time conditions. Currently, Zoho Desk does not provide native support for date-time-based triggers, limiting
                                                                                                              • Automation#25: Move Tickets to Unassigned When the Owner Is Offline

                                                                                                                Hello Everyone, Welcome to this week's Community Series! 'Tis the holiday season—a time when work often takes a brief pause. The holiday spirit is in full swing at Zylker Techfix too, with employees taking some well-deserved time off. During this period,
                                                                                                              • Automation#27: Retain Ticket Owner on Moved Tickets

                                                                                                                Hello Everyone! This week, we present to you a custom function that retains the ticket owner when a ticket is moved from one department to another. Here’s more to help you understand the custom function: At Zylker Techfix, Alex, the Support Engineer manages
                                                                                                              • Automation#28 Notify Agents on Article Expiry

                                                                                                                Hello Everyone! This week, we’re bringing you a feature that notifies your team when articles in the Knowledge Base are set to expire to keep your content relevant and helpful for customers. The Zoho Desk's Knowledge Base is an asset for customers to
                                                                                                              • Automation#29 Retain ticket status on moved tickets

                                                                                                                Hello Everyone, Hear out Zylker Techfix’s Success Story on Smoother Ticket Transitions! Zylker Techfix, a gadget servicing firm committed to quick repairs and timely deliveries, faced a challenge when ticket statuses changed automatically while moving
                                                                                                              • Automation#32:Auto Add New Portal Users to the Help Center User Groups

                                                                                                                Hello Everyone, Introducing a custom function that automates the process of adding new portal users to Help Center user groups, making user management effortless! By default, Zoho Desk allows you to assign new portal users to groups manually. But with
                                                                                                              • Automation#34 : Automate Email threading for Ticket notification

                                                                                                                Hello Everyone, It's been a while since we've presented an automation. However, our community has been buzzing with ideas, use cases, and discussions with our community experts and Ask the Experts session. So, here we are again, presenting an automation
                                                                                                              • Automation#35 : Auto-Add Comments under the Owner's Name in Tickets via Macros

                                                                                                                Hello Everyone, This week's custom function provides simple steps to configure a Macro for adding comments to tickets with the name of the Comment owner. When managing tickets, you can use the Comment feature to communicate internally with your team and
                                                                                                              • Automation#36: Auto-create time-entry after performing the Blueprint transition

                                                                                                                Hello Everyone, This week’s edition focuses on configuring a custom function within Zoho Desk to streamline time tracking within the Blueprint. In this case, we create a custom field, and request the agent to enter the spending time within the single
                                                                                                              • Automation#33: Automate Splitting Names for Existing Contact Records

                                                                                                                An organized directory – who doesn't love one? Previously, we explored how to split contact names into First Name and Last Name for new contacts in Zoho Desk. But what about existing contacts already in your database? This week, we bring you a custom
                                                                                                              • Workqueue

                                                                                                                I really like the idea of the Workqueue generally - it will be really useful. What it seems to lack however, is the ability to customise it properly. I want to be able to show a custom view rather than just "My Leads" and "Leads Assigned in Last 3 hours".
                                                                                                              • Webform & spam

                                                                                                                Hi, We set up 2 webform on our website, fowarding the content to Zoho CRM. Since it has been opened up, we are getting lot of spam message (for now about 20 a day). To lower the amount of false new leads we added the captcha field and new enquieries are
                                                                                                              • Zoho CRM Web form page URL

                                                                                                                Hi there, I am getting quite a bit of spam through my Zoho CRM Web form and want to restrict the URLs it is submittable from. I can see that I can add Location URLs but I need to be able to just add a domain so can I enter mydomain.com/* to cover all
                                                                                                              • Receiving too many Spam Leads. Why?

                                                                                                                I am receiving so many junk leads from web forms created by zoho's platform. The junk queries are increasing day by day and are affecting our business. I am continuously following up with zoho team from the past one year but not getting any satisfactory
                                                                                                              • Mail Merge is not working properly as far as the AUTOMATE section is concerned

                                                                                                                Hi there, I created a Mail Merge template for the Deal module. I would like Deal owners to mail merge their Deal records, download the Mail Merge document as a Word doc and make a few changes before sending it to the customer. Thing is, neither the "Merge
                                                                                                              • Canvas Detail View Related List Sorting

                                                                                                                Hello, I am having an issue finding a way to sort a related list within a canvas detail view. I have sorted the related list on the page layout associated with the canvas view, but that does not transfer to the canvas view. What am I missing?
                                                                                                              • project name field issue- n8n

                                                                                                                Hey guys, I have a question. I want to create a new product using the workflow. The problem is with the product name field; I don't know how to fill it in. The workflow starts with retrieving information from the leads table, retrieving links to scrape
                                                                                                              • Function #20: Custom calculation in item table of invoices

                                                                                                                When you create an invoice in Zoho Books, the 'Amount' of a line item is typically calculated as the product of the "Quantity" and the "Rate" of the item. For instance, if an item has a sales rate of $50 and a quantity of 5 is sold, then the amount would
                                                                                                              • Critical:- Eneble TDS filing for 26Q from the zoho book

                                                                                                                We currently extract TDS data from Zoho Books and manually input it into a separate TDS software to generate the FUV file and file returns. Previously, while using Tally, we benefited from an integrated feature that seamlessly recorded transactions and
                                                                                                              • How to track repeat customers?

                                                                                                                I own a food business and every order is entered into Zoho with: a unique Customer ID total order amount date of order With this information, I want to be able to see a list of my "best" customers. In other words, descending lists arranged according to:
                                                                                                              • How to hide or archive a blog post temporarily in Zoho commerce website builder?

                                                                                                                I would like to temporarily hide or archive a blog post in zoho commerce website builder so that it doesnt appear on my website till I enable it again. I tried to look for this option but could not find it.  It only allows me to permanently delete a blog
                                                                                                              • Zoho Books - Breaking A Working App

                                                                                                                We've been using Zoho for many years now. Across all apps, entering phone numbers in standard formats was enabled in all apps. These formats are: xxx.yyy.zzzz xxx-yyy-zzzz (xxx) yyy-zzzz and we were able also to add extension numbers in these formats:
                                                                                                              • Build data protection into your support

                                                                                                                At Zoho, privacy is our principle. Every Zoho product is built with privacy as the foundation and the finishing touch, guiding every decision we make. Security, privacy, and compliance are woven into the software development lifecycle, starting from how
                                                                                                              • Conditional formatting: before/after "today" not available

                                                                                                                When setting conditional formatting, it only allows me to set a specific calendar date when choosing "Before" or "After" conditions. Typing "today" returns the error "Value must be of type date". Is there a workaround? Thanks for any help!
                                                                                                              • Display Client Name in Zoho Creator Client Portal Dashboard

                                                                                                                Hello Zoho Creator Team, We hope you are doing well. Zoho Creator recently introduced the option to set a client’s display name in the Client Portal settings, which is very helpful for providing a personalized portal experience. However, there is currently
                                                                                                              • Customizable UI components in pages | Theme builder

                                                                                                                Anyone know when these roadmap items are scheduled for release? They were originally scheduled for Q4 2025. https://www.zoho.com/creator/product-roadmap.html
                                                                                                              • Amazon.in FBA multiple warehouse integration with Zoho Inventory

                                                                                                                My organisation subscribed to Zoho One looking at the opportunity to integrate Amazon.in with Inventory. But during the configuration, we understood the integration has severe limitations when it involves multiple warehouses in the same Organisation.
                                                                                                              • Feature Request - Set Default Values for Meetings

                                                                                                                Hi Zoho CRM Team, It would be very useful if we could set default values for meeting parameters. For example, if you always wanted Reminder 1 Day before. Currently you need to remember to choose it for every meeting. Also being able to use merge tags
                                                                                                              • Issues with Actions By Zoho Flow

                                                                                                                Hi, I have a workflow that fires when a deal reaches a stage. This then sends out a contract for the client to sign. I have connected this up through Actions by Zoho Flow. Unfortunately this fails to send out. I have tracked it down to the date fields.
                                                                                                              • CRM x WorkDrive: We're rolling out the WorkDrive-powered file storage experience for existing users

                                                                                                                Release plan: Gradual rollout to customers without file storage add-ons, in this order: 1. Standalone CRM 2. CRM Plus and Zoho One DCs: All | Editions: All Available now for: - Standalone CRM accounts in Free and Standard editions without file storage
                                                                                                              • Windows Desktop App - request to add minimization/startup options

                                                                                                                Support Team, Can you submit the following request to your development team? Here is what would be optimal in my opinion from UX perspective: 1) In the "Application Menu", add a menu item to Exit the app, as well as an alt-key shortcut for these menus
                                                                                                              • Ability for admin to access or make changes in zoho form without asking for ownership

                                                                                                                Currently in zoho form only form owner can make the changes in the form and if someone else has to make changes then we have to transfer the ownership to them and even admin also cant access it . So i think admin must have the ability or option to access
                                                                                                              • Issue with WhatsApp Template Approval and Marketing Message Limit in Zoho Bigin

                                                                                                                We are facing issues while creating and using WhatsApp message templates through Zoho Bigin, and we request your clarification and support regarding the same. 1. Utility Template Approval Issue Until December, we were able to create WhatsApp templates
                                                                                                              • Zoho CRM Calendar View

                                                                                                                Hello Zoho team, We need desperately a calendar view next to list, kandan and other views. I think it should be easy to implement as you already have the logic from Projects and also from Kanban View in CRM. In calendar view when we set it up - we choose
                                                                                                              • Camera

                                                                                                                I can sign on to a meeting and see the other participants, but my screen is dark. The instructions for Zoho "Camera Settings" say "click on lock icon in address bar," but I don't see that icon! Suggestions?
                                                                                                              • What is Workqueue and how to hide it?

                                                                                                                Hi, My CRM suddenly have this "Workqueue", may I ask how to set the permission of this tab?
                                                                                                              • Batch/lot # and Storage bin location

                                                                                                                Hi I want to ask for a feature on Zoho inventory I own a warehouse and I've gone through different management software solutions with no luck until I found Zoho, it has been a game changer for my business with up to the minute information, I'm extremely happy with it. It's almost perfect. And I say Almost because the only thing missing for me (and I'm sure I'm not alone) is the need of being able to identify the lot number of my inventory and where it is located in the warehouse. Due to the nature
                                                                                                              • Adding Sender Address with Basic Plan

                                                                                                                According to the knowledge base, I should be able to add Sender addresses with the Basic Plan. But whenever I try to add an email, it takes me to a search window and I cannot find any emails in the list. Even mine, which is the admin. email.
                                                                                                              • Conditional Field Visibility in Bigin CRM

                                                                                                                I would like to request support for conditional field visibility within Bigin CRM. This feature should allow administrators to configure show/hide rules for fields based on predefined criteria (e.g., field values, picklist selections, stage changes,
                                                                                                              • Next Page