Summary of the prompts and the key features we’ve developed for the CSVTextarea component:

1. Initial Request:
   • You asked for a web component for working with tabular data in a web form.
2. Basic Structure:
   • Created a custom element <csv-textarea> with attributes like rows, cols, column-headings, show-header, max-rows, and readonly.
   • The component allows editing CSV data directly in the web form.
3. Dynamic Rows:
   • Added functionality to dynamically add rows up to a specified maximum.
   • Implemented the ability to add a new row when “Shift+Enter” is pressed in the last cell of the last row.
4. Event Handling:
   • Added event listeners for cell changes and form submission.
   • Ensured the CSV content is included in the form data when the form is submitted.
5. JSON Conversion:
   • Added a method toJSON to convert the CSV content to JSON format.
6. Column and Row Interaction:
   • Implemented methods to update and retrieve cell values based on column names or indices.
   • Added functionality to select all text in a cell with “Ctrl+A” and all text in a row with “Ctrl+Right Arrow”.
7. Clean Up Rows:
   • Added a “Clean Up” button to remove empty rows.
   • Implemented the ability to trigger the cleanup of empty rows with “Shift+Backspace”.
8. Info Tooltip:
   • Added an info icon (ⓘ) in the upper right corner that shows a tooltip with a short explanation of the component and lists the key bindings.
   • Ensured the tooltip content includes the component’s name attribute as a heading and the title attribute content (if set).
9. Title Attribute Handling:
   • Ensured that changing the title attribute does not trigger the attributeChangedCallback method.
   • The title attribute is used in the tooltip to provide additional context for the component.
10. Key Bindings:
    • Summarized the key bindings in the tooltip:
      • Shift + Enter: Add a new row.
      • Shift + Backspace: Clean up empty rows.
      • Ctrl + A: Select all text in the current cell.
      • Ctrl + Right Arrow: Select all text in the current row.
      • Backspace: Delete selected text in each cell.
11. Form Submission:
    • Created the submitHybridForm function to handle form submissions using the fetch API.
    • The function assembles all form elements into a FormData object, includes the CSV content from any csv-textarea elements used in the form, and submits the form data based on the form’s action and method.
    • The response from fetch is passed to the callback function provided in the parameter.
12. Separate File for Form Submission:
    • Moved the submitHybridForm function to a separate file (formHandler.js) to ensure it can be used independently.
    • Updated the HTML file to include the new script.

These features and enhancements have been incrementally added based on your requirements and feedback, resulting in a robust and user-friendly CSVTextarea component.