#####Problem
The Query Builder's user interface was composed using a combination of Vue 2 custom components and WiKit elements, such as `TextArea`. The WiKit design system is now on its deprecation path, as it has been superseded by Codex, the official Wikimedia design system. The utilization of WiKit components is not recommended, and they should be replaced in order to reduce maintenance costs and ensure consistency.
#####Solution
We have to replace the WiKit `TextArea` by the Codex equivalent: `cdx-text-area` ([[ https://doc.wikimedia.org/codex/main/components/demos/text-area.html | See demo ]]) in combination with `cdx-field` ([[ https://doc.wikimedia.org/codex/main/components/demos/field.html#demos | See demo ]]). See 'Considerations' for more details. This will take us a step closer to switching to the new design system and deprecating the old.
#####Considerations
TBC
#####Acceptance criteria
[] WiKit's TextArea is replaced by its Codex equivalent
[] We use Codex's Field to add a label and inline validation messages to TextArea
[] Codex's Progress bar is used to display loading state