Product tabs integration

A MODX plugin adds your own tab to the product edit page: it registers a Vue component or an ExtJS panel in window.MS3ProductTabsRegistry.

Similar API

For order tabs use MS3OrderTabsRegistry.

Architecture

The product edit page is a hybrid: Vue tabs run inside an ExtJS TabPanel.

ExtJS TabPanel (top level)
├── Document (MODX system tab)
├── Product (Vue ProductTabs)
│   ├── Product Properties (Vue)
│   ├── Gallery (Vue)
│   ├── Categories (Vue ProductCategoriesTab)
│   ├── Links (Vue ProductLinksTab)
│   ├── Product options (Vue)
│   └── [Your tabs]
├── Template Variables (MODX system tab)
├── Settings (MODX system tab)
└── Resource Groups (MODX system tab)

Not every built-in tab is always there:

Tab	Key	Position	Shown when
Product Properties	properties	0	Always
Gallery	gallery	1	Unless show_gallery is off
Categories	categories	2	Unless show_categories is off
Links	links	3	Unless show_links is off
Product options	options	4	Unless show_options is off, and the product has options

Tab registration

The window.MS3ProductTabsRegistry.register(tabConfig) method accepts:

Parameter	Type	Required	Description
key	string	Yes	Unique tab identifier
title	string	Yes	Tab title
type	string	No	'vue' (default) or 'extjs'
component	object	For Vue	The component object — an imported SFC, for one. A string name only works if the component is already registered on the app via app.component(); the core does not look names up in window
xtype	string	For ExtJS	ExtJS component xtype
extConfig	object	No	Additional ExtJS configuration
props	object	No	Additional props for the Vue component
position	number	No	Tab position among the others (default 100)

Returns: boolean — whether registration succeeded.

Keys of the built-in tabs (properties, gallery, categories, links, options) must not be taken: the core checks for duplicates among plugin tabs only and does not catch such a clash.

What the component receives

The tab receives this data automatically:

Parameter	Type	Description	Where available
productId	number	Product ID	props of the Vue component
record	object	Product data	props of the Vue component, config.record in the ExtJS panel

For ExtJS tabs the core injects record into extConfig itself — you do not need to pass it.

Load order

product-tabs.min.js is included as an ES module, and modules run after the page has been parsed. A plain plugin script therefore always runs earlier, and at that moment window.MS3ProductTabsRegistry does not exist yet.

Do not create a stub

The order page uses a stub-with-a-queue approach. It does not work here: the registry is created as window.MS3ProductTabsRegistry || new ProductTabsRegistry(), so your stub object stays where the real registry should be. Tab initialisation then calls _onMounted() on it, which the stub does not have, and not a single queued tab appears.

Wait for the registry instead — see the function below.

Waiting for the registry

This function defers the registration; it works for both Vue and ExtJS tabs:

function whenRegistryReady(callback, attemptsLeft) {
    if (window.MS3ProductTabsRegistry) {
        callback(window.MS3ProductTabsRegistry)
        return
    }
    if (attemptsLeft === undefined) attemptsLeft = 50 // ~5 seconds
    if (attemptsLeft <= 0) return
    setTimeout(function() { whenRegistryReady(callback, attemptsLeft - 1) }, 100)
}

The attempt limit is not optional: without it the polling never stops where no registry exists — on the product create page, for one.

The examples below call it by name.

Vue component integration

1. Create the component

<!-- my-component/src/components/VariantsTab.vue -->
<template>
  <div class="variants-tab">
    <h3>Product #{{ productId }} variants</h3>
    <!-- Your content -->
  </div>
</template>

<script setup>
defineProps({
  productId: {
    type: Number,
    required: true
  },
  record: {
    type: Object,
    required: true
  }
})
</script>

2. Create the entry point

// my-component/src/entries/variants-tab.js
import VariantsTab from '../components/VariantsTab.vue'

whenRegistryReady(registry => {
  registry.register({
    key: 'variants',
    title: 'Variants',
    type: 'vue',
    component: VariantsTab, // the component object, not a string
    position: 5, // after "Product options"
  })
})

3. Load the script from a MODX plugin

<?php
// MODX plugin — event: msOnManagerCustomCssJs

$page = $scriptProperties['page'] ?? '';
if ($page !== 'product_update') {
    return;
}

$controller = $scriptProperties['controller'];
$assetsUrl = MODX_ASSETS_URL . 'components/mycomponent/';

$controller->addHtml(
    '<script type="module" src="' . $assetsUrl . 'js/variants-tab.min.js"></script>'
);

There are no tabs on the create page

The event fires on the create page as well, with page => 'product_create', but product-tabs.min.js is not included there, the Product tab is absent and no registry ever appears. So checking for product_create buys you nothing: the script runs for nothing, and waiting for the registry would poll the page until it is closed. Custom tabs are only available for a saved product.

A Vue component inside ProductTabs inherits the styles of the .vueApp container.

ExtJS component integration

1. Create an ExtJS panel

// assets/components/mycomponent/js/mgr/widgets/custom.panel.js
MyComponent.panel.CustomTab = function(config) {
    config = config || {};

    Ext.apply(config, {
        border: false,
        layout: 'anchor',
        items: [{
            xtype: 'modx-grid',
            // ... grid config
        }]
    });

    MyComponent.panel.CustomTab.superclass.constructor.call(this, config);
};
Ext.extend(MyComponent.panel.CustomTab, MODx.Panel);
Ext.reg('mycomponent-custom-tab', MyComponent.panel.CustomTab);

2. Register the tab

// assets/components/mycomponent/js/mgr/product-integration.js
whenRegistryReady(function(registry) {
    registry.register({
        key: 'custom',
        title: 'Custom tab',
        type: 'extjs',
        xtype: 'mycomponent-custom-tab',
        extConfig: {
            // the core injects record itself, put only your own params here
            myParam: 'value'
        },
        position: 6
    });
});

Ext.onReady() will not do for registration: it fires before the ES module with the registry runs. Wait for the registry with the function from the section above.

3. Load scripts

<?php
// MODX plugin — event: msOnManagerCustomCssJs

$page = $scriptProperties['page'] ?? '';
if ($page !== 'product_update' && $page !== 'product_create') {
    return;
}

$controller = $scriptProperties['controller'];
$assetsUrl = MODX_ASSETS_URL . 'components/mycomponent/';

// The panel first, the registration second
$controller->addLastJavascript($assetsUrl . 'js/mgr/widgets/custom.panel.js');
$controller->addLastJavascript($assetsUrl . 'js/mgr/product-integration.js');

An ExtJS panel is mounted only when the tab is opened and is destroyed together with the page.

Tab positioning

Built-in tabs occupy positions 0–4, and a tab without position gets 100. To land right after the built-in ones, set a value between 5 and 99.

position: 0 never reaches the tab: the core reads the value as position || 100 and substitutes 100. To sit ahead of Product Properties you need a negative number.

If the tab does not appear

The core logs the reason, and the prefix depends on when the tab was rejected:

Message	When
[ProductTabsRegistry] Tab must have key and title	key or title missing
[ProductTabsRegistry] Tab "…" already registered	Duplicate key in the queue, before it reaches Vue
[ProductTabs] Tab with key "…" already registered	Duplicate key registered on an already open page
TypeError: … _onMounted is not a function	You created a stub — see the warning in Load order

Filtering the console by [ProductTabs] is not enough: some messages arrive with the [ProductTabsRegistry] prefix.

What to look at in the browser console:

// Tabs still waiting to reach Vue
console.log(window.MS3ProductTabsRegistry.pendingTabs);

A queue that is not empty after the page has loaded means the tabs never reached Vue.