As Aaron pointed out the form is added in Magento/Checkout/Block/Checkout/LayoutProcessor.php
.
With this information I developed a module with an after plugin that hooks onto that processor:
app/code/<vendor>/<module>/Model/Checkout/LayoutProcessorPlugin.php
<?php
namespace <vendor>\ReorderBillingForm\Model\Checkout;
class LayoutProcessorPlugin
{
/**
* @param \Magento\Checkout\Block\Checkout\LayoutProcessor $subject
* @param array $jsLayout
* @return array
*/
public function afterProcess(
\Magento\Checkout\Block\Checkout\LayoutProcessor $subject,
array $jsLayout
)
{
// get billing address form at billing step
$billingAddressForm = $jsLayout['components']['checkout']['children']['steps']['children']['billing-step']['children']['payment']['children']['afterMethods']['children']['billing-address-form'];
// move address form to shipping step
$jsLayout['components']['checkout']['children']['steps']['children']['shipping-step']['children']['billing-address-form'] = $billingAddressForm;
// remove form from billing step
unset($jsLayout['components']['checkout']['children']['steps']['children']['billing-step']['children']['payment']['children']['afterMethods']['children']['billing-address-form']);
return $jsLayout;
}
}
app/code/<vendor>/<module>/etc/module.xml
<?xml version="1.0" ?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
<module name="<vendor>_<module>" setup_version="1.0.0"/>
</config>
app/code/<vendor>/<module>/etc/di.xml
<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
<type name="Magento\Checkout\Block\Checkout\LayoutProcessor">
<plugin name="reorder-billing-form"
type="<vendor>\<module>\Model\Checkout\LayoutProcessorPlugin" sortOrder="<yourOrder>"/>
</type>
</config>
app/code/<vendor>/<module>/registration.php
<?php
\Magento\Framework\Component\ComponentRegistrar::register(
\Magento\Framework\Component\ComponentRegistrar::MODULE,
'<vendor>_<module>',
__DIR__
);
This successfully reorders the billing address form (and hopefully saves some headaches for other people). But there is still work needed on the javascript(?) that handles the billing address is the same as shipping address
mechanism. As this still works the "standard" way.
Additional info:
I saw that in the backend if you create a new order the layout is exactly as wanted. The billing form is "before" the shipping form and the logic is the other way around too.
If I can find the time I think it might be beneficial to look at the code there. Maybe it is possible to use it in frontend too.
Best Answer
Create a plugin that will override the Checkout Layoutpreprocessor -
If you see the file has components used for JS - So in order to do that you will have to create JS files for billing-address.js -
Similarly shipping-mixin.js within mixin folder -
You will be required to add the requirejs-config.js for mapping -
The within web/template/billing-address.html
Similarly - web/template/address.html
For adding the billing address form add - web/template/billing-address/form.html
And for billing addresses list - web/template/billing-address/list.html
The above code has been written by Sohel Rana, and the link to the module is this You can also directly install the plugin