Create content control list

Creates a ContentControlList from all single-level numbered lists throughout the document, as well as from the manually selected text section.

(function() {
    let doc = Api.GetDocument();

    let contentControlList; // Reference to the current content control list (dropdown)
    let contentControlListIndex = 0; // Tracks the number of content control lists created

    // Helper function: Converts all numbered paragraphs in the selected part of the document to content control lists
    function processSelectedParagraphs(selectedParagraphs) {
        let numberedParagraphsIndex = [];

        for (let i = 0; i < selectedParagraphs.length; i++) {
            let numbering = selectedParagraphs[i].GetNumbering(); // Used to collect indexes of numbered paragraphs for deletion

            if (numbering && numbering.GetClassType() === 'numberingLevel') {
                numberedParagraphsIndex.push(i);

                let text = selectedParagraphs[i].GetText().trim();

                addContentControlList(i, text, selectedParagraphs[i]);
            }
        }

        // Delete the original numbered paragraphs
        for (let i = 0; i < numberedParagraphsIndex.length; i++) {
            let deleteParagraphIndex = numberedParagraphsIndex[i];
            selectedParagraphs[deleteParagraphIndex].Delete();
        }
    }

    // Helper function: Converts all numbered paragraphs in the entire document into content control lists
    function processAllDocument() {
        let numberedParagraphs = doc.GetAllNumberedParagraphs();
        console.log(numberedParagraphs)

        for (let i = 0; i < numberedParagraphs.length; i++) {
            let text = numberedParagraphs[i].GetText().trim();
            addContentControlList(i, text, numberedParagraphs[i]);
        }

        // Delete the original numbered paragraphs
        for (let i = 0; i < numberedParagraphs.length; i++) {
            numberedParagraphs[i].Delete();
        }
    }

    // Helper function: Creates a content control list from a numbered paragraph
    function addContentControlList(i, text, paragraph) {
        // Match formats like "1.", "1)", "A.", "a)", "I." etc.
        const starterRegex = /^(1[\.\)]|[aAiI][\.\)]?)\s+/;

        if (starterRegex.test(text)) {
            // Start a new dropdown
            contentControlListIndex++;

            let newPara = Api.CreateParagraph();
            newPara.AddText(' ');
            paragraph.InsertParagraph(newPara, "before", true);
            newPara.GetRange(0, 1).Select();

            let control = doc.AddDropDownListContentControl([]);
            contentControlList = control.GetDropdownList();

            contentControlList.Add(text, text, i);
        } else {
            // Append to the current dropdown
            contentControlList.Add(text, text, i);
        }
    }

    // Check if there is a selection in the document and run the appropriate function
    let selectedRange = doc.GetRangeBySelect();
    let selectedText = selectedRange ? selectedRange.GetText().trim() : "";

    if (selectedText.length > 0) {
        let selectedParagraphs = selectedRange.GetAllParagraphs();
        processSelectedParagraphs(selectedParagraphs);
    } else {
        processAllDocument();
    }
})();

Methods used: GetDocument, GetNumbering, GetClassType, GetText, Delete, GetAllNumberedParagraphs, CreateParagraph, AddText, InsertParagraph, GetRange, Select, AddDropDownListContentControl, GetDropdownList, Add, GetRangeBySelect, GetAllParagraphs

Result