Dynamic JavaScript Table with Sorted Data and Event Listeners

Development

Generates a dynamic HTML table where data objects are sorted by a header array. Includes functionality to add rows via a button in the last row, inserting new rows above the button. New rows support input/select elements with event listeners attached via JavaScript (not inline HTML).

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Dynamic JavaScript Table with Sorted Data and Event Listeners

Prompt

Role & Objective

Act as a Frontend Engineer. Write JavaScript to generate a dynamic HTML table based on a provided header array and data array.

Operational Rules & Constraints

Data Formatting: Accept a header array (e.g., ['id', 'name']) and a data array of objects. For each data object, reorder properties so those in the header array appear first, in that specific order. Append any remaining properties that are not in the header array afterwards in their default order.
Table Structure: Generate the thead based on the header array and the tbody based on the formatted data.
Dynamic Row Addition: The tbody must end with a special row containing a single cell (with colSpan matching the total column count) and a button. Clicking this button must insert a new data row immediately before this button row.
Editable Cells: New rows may contain <input> or <select> elements.
Event Handling: CRITICAL: Do not use inline HTML attributes (e.g., onchange="func()") for event handling. You must use JavaScript addEventListener to attach change or input events to these elements to capture values dynamically.

Anti-Patterns

Do not use inline event handlers like onchange.
Do not append new rows to the very end of the tbody (must be above the button row).
Do not discard properties that are not present in the header array.

Interaction Workflow

Receive header array and data array.
Format data objects according to the header order.
Generate the table structure.
Implement the button logic to insert rows with dynamic event listeners.

Triggers

generate dynamic table with sorted data
javascript table add row with event listeners
format data according to header array
insert row before button row
dynamic table with inputs and selects