qbittorrent-webui-cjratliff.com/private/views/confirmdeletion.html

<div id="confirmDeletionDialog">
    <div class="confirmDeletionGrid">
        <span class="deletionGridItem confirmDialogWarning"></span>
        <span class="deletionGridItem dialogMessage" id="deleteTorrentMessage"></span>
        <span class="deletionGridItem">
            <button class="disabled" type="button" id="rememberBtn" title="Remember choice" aria-label="Remember choice" disabled></button>
        </span>
        <span class="deletionGridItem">
            <input type="checkbox" id="deleteFromDiskCB">
            <label for="deleteFromDiskCB">
                <em>Also remove the content files</em>
            </label>
        </span>
    </div>
</div>
<div>
    <input type="button" value="Remove" id="confirmDeletionButton">
    <input type="button" value="Cancel" id="cancelDeletionButton">
</div>

<script>
    "use strict";

    (() => {
        const setRememberBtnEnabled = (enable) => {
            rememberButton.disabled = !enable;
            rememberButton.classList.toggle("disabled", !enable);
        };

        const confirmButton = document.getElementById("confirmDeletionButton");
        const cancelButton = document.getElementById("cancelDeletionButton");
        const rememberButton = document.getElementById("rememberBtn");
        const deleteCB = document.getElementById("deleteFromDiskCB");
        const deletionText = document.getElementById("deleteTorrentMessage");

        const {
            hashes,
            forceDeleteFiles = false,
            filterList = null
        } = window.MUI.Windows.instances["confirmDeletionPage"].options.data;
        let prefDeleteContentFiles = window.qBittorrent.Cache.preferences.get().delete_torrent_content_files;
        deleteCB.checked = forceDeleteFiles || prefDeleteContentFiles;

        let deleteMessage;
        if (hashes.length === 1) {
            const { full_data: { name } } = torrentsTable.getRow(hashes[0]);
            deleteMessage = "Are you sure you want to remove %1 from the transfer list?".replace("%1", `"${name}"`);
        }
        else {
            deleteMessage = "Are you sure you want to remove these %1 torrents from the transfer list?".replace("%1", hashes.length);
        }

        deletionText.textContent = deleteMessage;

        // Enable "Remember" button if the current choice is different from the saved preference
        deleteCB.addEventListener("click", (e) => { setRememberBtnEnabled(deleteCB.checked !== prefDeleteContentFiles); });

        // Set current "Delete files" choice as the default
        rememberButton.addEventListener("click", (e) => {
            window.qBittorrent.Cache.preferences.set({
                data: {
                    "delete_torrent_content_files": deleteCB.checked
                },
                onSuccess: function() {
                    prefDeleteContentFiles = deleteCB.checked;
                    setRememberBtnEnabled(false);
                }
            });
        });

        cancelButton.focus();
        cancelButton.addEventListener("click", (e) => { window.qBittorrent.Client.closeWindows(); });

        confirmButton.addEventListener("click", (e) => {
            torrentsTable.deselectAll();
            new Request({
                url: "api/v2/torrents/delete",
                method: "post",
                data: {
                    "hashes": hashes.join("|"),
                    "deleteFiles": deleteCB.checked
                },
                onSuccess: function() {
                    if (filterList === "tracker")
                        setTrackerFilter(TRACKERS_ALL);
                    updateMainData();
                    window.qBittorrent.Client.closeWindows();
                },
                onFailure: function() {
                    alert("Unable to delete torrents.");
                },
            }).send();
        });
    })();
</script>