Style for tab header close button is not properly applied

[Maria Tsvyatkova]

Description

Setting style for the close button in a tab header using the part like this:

igc-dockmanager::part(tab-header-close-button) {
background-color: #e73c7e;
}

does not work unless a custom button is defined for the closeButton slot

Steps to reproduce

1. Open the sample under Customization topic in the documentation: https://www.infragistics.com/products/ignite-ui-web-components/web-components/components/layouts/dock-manager#customization
2. Comment out the custom close button in the index.html file

Result

The background color is not applied to the tab header close button.

Expected result

The background color should be applied to the tab header close button.

Attachments