While working on a Magento 2 project for our client, I was supposed to create more/less button, which is not part of neither Blank or Luma themes. The button should be on product page, but only inside of Details tab on desktop (accordion on mobile), which displays product description field in Admin.
Before we get started, I have created a custom theme (Inchoo/MoreLess that is extending Blank theme), make sure to update the correct path for your theme as we go along. The code was written on latest (2.1.6) installation with sample data.
In this short and simple example we will explain how to create listener in Magento 2 UI component. We will explain it on built in Magento 2 UI component Columns which use component Magento_Ui/js/grid/listing (part of admin grid interface).
Since Magento 2 is out for quite some time now and new projects based on the platform are rapidly approaching, there is no doubt that we, as developers, need to be adequately prepared for the challenge.