Hannes Pries - Web/Shopware/JavaScript-Developer Blog
Weil es immer eine simple Lösung gibt!

const observer = new MutationObserver((mutationlist, observer) => {
mutationlist.forEach(mutation => {
if(mutation.type === 'childList') {
const picker = document.querySelector('.hp_shipping_date.form-control');
if(picker) {
picker.setAttribute('form', 'confirmOrderForm');
observer.disconnect();
}
}
});
});

observer.observe(document.querySelector('.hp-shipping-date-container'), {childList: true, subtree: true});

http:localhost/storefront/script/testscript?value=test

Resources/scripts/storefront-testscript/index.twig

{% set value = hook.query['value'] %}

{% set response = services.response.json({'value': value}) %}
{% do response.cache.disable() %}
{% do hook.setResponse(response) %}

$event->getContext()->getSource() instanceof AdminApiSource

import Plugin from 'src/plugin-system/plugin.class';

export default class ExamplePlugin extends Plugin {
init() {
console.log('plugin is bind to this element', this.el);
}
}

import ExamplePlugin from './example-plugin/';

window.PluginManager.register('ExamplePlugin', ExamplePlugin, '[data-example-plugin]');

...
<div data-example-plugin="true"></div>
...

initComponent: function() {
var me = this;
me.callParent(arguments);

me.articleStore = Ext.create('Ext.data.Store', {
model: 'Shopware.model.Dynamic',
proxy: {
type: 'ajax',
url: '{url controller="EntitySearch" action="search"}?model=Shopware\\Models\\Article\\Article',
reader: Ext.create('Shopware.model.DynamicReader')
}
});

me.articles = Ext.create('Ext.form.field.ComboBox', {
name: 'article',
fieldLabel: 'Artikel',
store: me.articleStore,
allowBlank: false,
valueField: 'id',
displayField: 'name'
});
me.articles.setVisible(true);
me.elementFieldset.add(me.articles);
},