oont-contents/plugins/header-footer-code-manager/js/nnr-hfcm-showboxes.js

// function to show dependent dropdowns for "Site Display" field.

function hfcm_showotherboxes(type)
{
    var header = '<option value="header">' + hfcm_localize.header + '</option>',
        before_content = '<option value="before_content">' + hfcm_localize.before_content + '</option>',
        after_content = '<option value="after_content">' + hfcm_localize.after_content + '</option>',
        footer = '<option value="footer">' + hfcm_localize.footer + '</option>',
        all_options = header + before_content + after_content + footer;

    if (type == 'All') {
        jQuery('#ex_pages, #ex_posts,  #locationtr').show();
        hfcm_remember_loc(header + footer);
        jQuery('#s_categories, #s_pages, #s_tags, #c_posttype, #lp_count, #s_posts').hide();
    } else if (type == 's_pages') {
        jQuery('#s_pages, #locationtr').show();
        hfcm_remember_loc(all_options);
        jQuery('#s_categories, #s_tags, #ex_pages, #ex_posts,  #c_posttype, #lp_count, #s_posts').hide();
    } else if (type == 's_posts') {
        jQuery('#s_posts, #locationtr').show();
        hfcm_remember_loc(all_options);
        jQuery('#s_pages, #s_categories, #ex_pages, #ex_posts,  #s_tags, #c_posttype, #lp_count').hide();
    } else if (type == 's_categories') {
        jQuery('#s_categories, #locationtr').show();
        hfcm_remember_loc(all_options);
        jQuery('#s_pages, #s_tags, #c_posttype, #ex_pages, #ex_posts,  #lp_count, #s_posts').hide();
    } else if (type == 's_custom_posts') {
        jQuery('#c_posttype, #locationtr').show();
        hfcm_remember_loc(all_options);
        jQuery('#s_categories, #s_tags, #s_pages, #ex_pages, #ex_posts,  #lp_count, #s_posts').hide();
    } else if (type == 's_tags') {
        hfcm_remember_loc(all_options);
        jQuery('#s_tags, #locationtr').show();
        jQuery('#s_categories, #s_pages, #c_posttype, #ex_pages, #ex_posts,  #lp_count, #s_posts').hide();
    } else if (type == 'latest_posts') {
        hfcm_remember_loc(all_options);
        jQuery('#s_pages, #s_categories, #s_tags, #ex_pages, #ex_posts,  #c_posttype, #s_posts').hide();
        jQuery('#lp_count, #locationtr').show();
    } else if (type == 'manual') {
        jQuery('#s_pages, #s_categories, #s_tags,#ex_pages, #ex_posts,  #c_posttype, #lp_count, #locationtr, #s_posts').hide();
    } else {
        hfcm_remember_loc(header + footer);
        jQuery('#s_pages, #s_categories, #s_tags, #c_posttype, #lp_count, #s_posts').hide();
        jQuery('#locationtr').show();
    }
}

function hfcm_remember_loc(new_html)
{
    var tmp = jQuery('#data_location option:selected').val();
    jQuery('#data_location').html(new_html);
    jQuery('#data_location option[value="' + tmp + '"]').prop('selected', true);
}

function hfcmCopyToClipboard(elem)
{
    // create hidden text element, if it doesn't already exist
    var targetId = "_hiddenCopyText_";
    var isInput = elem.tagName === "INPUT" || elem.tagName === "TEXTAREA";
    var origSelectionStart, origSelectionEnd;

    // must use a temporary form element for the selection and copy
    target = document.getElementById(targetId);
    if (!target) {
        var target = document.createElement("textarea");
        target.style.position = "absolute";
        target.style.left = "-9999px";
        target.style.top = "0";
        target.id = targetId;
        document.body.appendChild(target);
    }
    target.textContent = elem.getAttribute('data-shortcode');
    elem.textContent = "Copied!";

    setTimeout(
        function () {
            elem.textContent = "Copy";
        }, 2000
    );
    // select the content
    var currentFocus = document.activeElement;
    target.focus();
    target.setSelectionRange(0, target.value.length);

    // copy the selection
    var succeed;
    try {
        succeed = document.execCommand("copy");
    } catch (e) {
        succeed = false;
    }
    // restore original focus
    if (currentFocus && typeof currentFocus.focus === "function") {
        currentFocus.focus();
    }

    if (isInput) {
        // restore prior selection
        elem.setSelectionRange(origSelectionStart, origSelectionEnd);
    } else {
        // clear temporary content
        target.textContent = "";
    }
    target.remove();
    return succeed;
}

function nnr_confirm_delete_snippet()
{
    return confirm("Are you sure you want to delete this snippet?");
}

// init selectize.js
jQuery('#loader').show();
jQuery(
    function ($) {

        var nnr_hfcm_data = {
            action: 'hfcm-request',
            id: hfcm_localize.id,
            get_posts: true,
            security: hfcm_localize.security
        };

        $.post(
            ajaxurl,
            nnr_hfcm_data,
            function (new_data) {
                var all_posts = $.merge([{text: "", value:""}], new_data.posts);
                var options = {
                    plugins: ['remove_button'],
                    options: all_posts,
                    items: new_data.selected
                };
                $('#loader').hide();
                $('#s_posts select').selectize(options);
                var options = {
                    plugins: ['remove_button'],
                    options: new_data.posts,
                    items: new_data.excluded
                };
                $('#loader').hide();
                $('#ex_posts select').selectize(options);
            },
            'json', // ajax result format
        );
        // selectize all <select multiple> elements
        $('#s_pages select, #s_categories select, #c_posttype select, #s_tags select, #ex_pages select').selectize(
            {
                plugins: ['remove_button']
            }
        );

        if ($('#nnr_newcontent').length) {
            var editorSettings = wp.codeEditor.defaultSettings ? _.clone(wp.codeEditor.defaultSettings) : {};
            editorSettings.codemirror = _.extend(
                {},
                editorSettings.codemirror,
                {
                    indentUnit: 2,
                    tabSize: 2,
                    //mode: 'javascript',
                }
            );
            var editor = wp.codeEditor.initialize($('#nnr_newcontent'), editorSettings);
        }

        document.getElementById("hfcm_copy_shortcode").addEventListener(
            "click", function () {
                hfcmCopyToClipboard(document.getElementById("hfcm_copy_shortcode"));
            }
        );
    }
);