kencarino/Delete facebook group members (all the one visible on a given page)

## Delete facebook group members (all the one visible on a given page)
/**
 *
 * This script will remove all group members displayed on group page except admins.
 *
 * @author: Nir Geier
 * @modified: Ken Carino
 *
 * Updated May 29, 2019 - Tested on Chrome Version 74.0.3729.169
 *
 * Requirements:
 *    1. Facebook must use english as language
 *
 * Usage:
 *    Load as many users in group members page, then open console and paste this script in the
 *    console. All members loaded in the page will be deleted by this code.
 *
 *    Once the script finished executing, the page will automatically reload.
 *
 *    If looking the console doesn't give any feedback of what's happening, reload the
 *    page and repeat again. Take into account that it will delete one user per second,
 *    so it may take a while.
 *
*/
var FBClearGroup = function() {

    /**
     * Var initialization
     */
    var memberSettings, removeLinks, timer;

    /**
     * This will grab all remove links available on the page
     */
    function grabRemoveLink() {
        memberSettings = Array.prototype.slice.call(document.querySelectorAll("button[aria-label='Member Settings']"));

        // Expose all the remove users links except the first one, which is the admin
        var i = 0;
        var adminsNum = 1;

        memberSettings.forEach(function(item) {
            i = i + 1;
            if (i <= (adminsNum*2)) {
                return;
            }
            item.click();
            document.querySelectorAll('a[data-testid="leave_group"]')[0].click();
        });

        console.log('Getting all remove links...');

        // continue with the delete flow
        timer = setTimeout(removeMember, 10000);
    }

    /**
     * This function will trigger remove buttons
     */
    function removeMember() {
        clearTimeout(timer);

        var confirmButton = Array.prototype.slice.call(document.querySelectorAll('button.layerConfirm.uiOverlayButton'));

        var i = 1;
        confirmButton.forEach(function(item) {
            console.log(item);
            setTimeout(function() {
                item.click();
                console.log('Removing member...');
            }, i * 1000);
            i = i + 1;
        });

        // Reload the page after everything is finished + 7 seconds
        setTimeout(function() {
            window.location.reload(false);
        }, (i + 7) * 1000);
    }

    grabRemoveLink();
}();