jquery响应式自定义弹出层对话框插件

使用方法

jQuery(document).ready(function($) {

    // loading modal ------------------------------------------------------------------------------------------------------------

    // init
    var $modals = $('.js-modal'),
        $body = $('body');

    $modals.each(function(index_to_expand) {
        var $this = $(this),
            index_lisible = index_to_expand + 1;

        $this.attr({
            'id': 'label_modal_' + index_lisible,
            'aria-haspopup': 'dialog'
        });

    });

    // jQuery formatted selector to search for focusable items
    var focusableElementsString = "a[href], area[href], input:not([type='hidden']):not([disabled]), select:not([disabled]), textarea:not([disabled]), button:not([disabled]), iframe, object, embed, *[tabindex], *[contenteditable]";

    if ($('#js-modal-page').length === 0) { // just to avoid missing #js-modal-page
        $body.wrapInner('<div id="js-modal-page"></div>');
    }

    // events ------------------
    $body.on('click', '.js-modal', function(event) {
        var $this = $(this),
            options = $this.data(),
            $modal_starter_id = $this.attr('id'),
            $modal_prefix_classes = typeof options.modalPrefixClass !== 'undefined' ? options.modalPrefixClass + '-' : '',
            $modal_text = options.modalText || '',
            modal_content_id = typeof options.modalContentId !== 'undefined' ? options.modalContentId : '',
            $modal_content = typeof options.modalContentId !== 'undefined' ? $('#' + modal_content_id) : '',
            $modal_title = options.modalTitle || '',
            $modal_close_text = options.modalCloseText || '关闭',
            $modal_close_title = options.modalCloseTitle || options.modalCloseText,
            $modal_close_img = options.modalCloseImg || '',
            $modal_background_click = options.modalBackgroundClick || '',
            $modal_focus_id = options.modalFocusId || '',
            $modal_aria = typeof options.modalAriaModal !== 'undefined' ? 'aria-modal="true"' : '',
            $modal_role_alertdialog = typeof options.modalUseRoleAlertdialog !== 'undefined' ? 'role="alertdialog"' : '',
            $modal_role_dialog = typeof options.modalRemoveRoleDialog !== 'undefined' || $modal_role_alertdialog === 'role="alertdialog"' ? '' : 'role="dialog"',
            $modal_tag = typeof options.modalRemoveDialogTag !== 'undefined' ? 'div' : 'dialog',
            $modal_code,
            $modal_overlay,
            $page = $('#js-modal-page');

        // insert code at the end
        $modal_code = '<' + $modal_tag + ' ' + $modal_role_dialog + ' ' + $modal_role_alertdialog + ' id="js-modal" class="' + $modal_prefix_classes + 'modal" aria-labelledby="modal-title" open ' + $modal_aria + '><div role="document" class="' + $modal_prefix_classes + 'modal__wrapper">';
        $modal_code += '<button type="button" id="js-modal-close" class="' + $modal_prefix_classes + 'modal-close" data-content-back-id="' + modal_content_id + '" data-focus-back="' + $modal_starter_id + '" title="' + $modal_close_title + '">';
        if ($modal_close_img !== '') {
            $modal_code += '<img src="' + $modal_close_img + '" alt="' + $modal_close_text + '" class="' + $modal_prefix_classes + 'modal__closeimg" />';
        } else {
            $modal_code += '<span class="' + $modal_prefix_classes + 'modal-close__text">' + $modal_close_text + '</span>';
        }
        $modal_code += '</button>';
        $modal_code += '<div class="' + $modal_prefix_classes + 'modal__content">';
        if ($modal_title !== '') {
            $modal_code += '<h1 id="modal-title" class="' + $modal_prefix_classes + 'modal-title">' + $modal_title + '</h1>';
        }

        if ($modal_text !== '') {
            $modal_code += '<p>' + $modal_text + '</p>';
        } else {
            if (modal_content_id !== '' && $modal_content.length) {
                //var $modal_content_id = $('#' + $modal_content_id);
                $modal_code += '<div id="js-modal-content">';
                $modal_code += $modal_content.html();
                $modal_code += '</div>';
                $modal_content.empty();
            }
        }
        $modal_code += '</div></div></' + $modal_tag + '>';

        $($modal_code).insertAfter($page);
        $body.addClass('no-scroll');

        $page.attr('aria-hidden', 'true');

        // add overlay
        if ($modal_background_click !== 'disabled') {
            $modal_overlay = '<span id="js-modal-overlay" class="' + $modal_prefix_classes + 'modal-overlay" title="' + $modal_close_title + '" data-background-click="enabled"><span class="invisible">' + $modal_close_text + '</span></span>';
        } else {
            $modal_overlay = '<span id="js-modal-overlay" class="' + $modal_prefix_classes + 'modal-overlay" data-background-click="disabled"></span>';
        }

        $($modal_overlay).insertAfter($('#js-modal'));

        if ($modal_focus_id !== '') {
            $('#' + $modal_focus_id).focus();
        } else {
            $('#js-modal-close').focus();
        }


        event.preventDefault();

    })
    // close button and esc key
    $body.on('click', '#js-modal-close', function() {
            var $this = $(this),
                $focus_back = '#' + $this.attr('data-focus-back'),
                $content_back_id = $this.attr('data-content-back-id'),
                $js_modal = $('#js-modal'),
                $js_modal_content = $('#js-modal-content'),
                $class_element = $js_modal.attr('class'),
                $class_element_reverse = $class_element + '--reverse',
                $js_modal_overlay = $('#js-modal-overlay'),
                $page = $('#js-modal-page');

            $page.removeAttr('aria-hidden');

            var delay = $js_modal.css("animation-duration");
            //alert(delay);
            if (delay != '0s') {
                var timeout = parseFloat(delay.replace('s', '')) * 1000;
                timeout++;

                $js_modal.removeClass($class_element);
                setTimeout(function() {
                    $js_modal.addClass($class_element_reverse);
                }, 1);
                setTimeout(function() {
                    $body.removeClass('no-scroll');
                    $js_modal.remove();
                    $js_modal_overlay.remove();
                    if ($content_back_id !== '') {
                        $('#' + $content_back_id).html($js_modal_content.html());
                    }
                    $($focus_back).focus();
                    $js_modal.removeClass($class_element_reverse);
                    $js_modal.addClass($class_element);
                }, timeout);
            } else {
                $body.removeClass('no-scroll');
                $js_modal.remove();
                $js_modal_overlay.remove();
                if ($content_back_id !== '') {
                    $('#' + $content_back_id).html($js_modal_content.html());
                }
                $($focus_back).focus();
            }

        })
        .on('click', '#js-modal-overlay', function(event) {
            var $close = $('#js-modal-close');

            event.preventDefault();
            $close.trigger('click');

        })
        .on('click', '.js-modal-close', function(event) {
            var $close = $('#js-modal-close');

            $close.trigger('click');

        })
        .on('keydown', '#js-modal-overlay', function(event) {
            var $close = $('#js-modal-close');

            if (event.keyCode == 13 || event.keyCode == 32) { // space or enter
                event.preventDefault();
                $close.trigger('click');
            }
        })
        .on("keydown", "#js-modal", function(event) {
            var $this = $(this),
                $close = $('#js-modal-close');

            if (event.keyCode == 27) { // esc
                $close.trigger('click');
            }
            if (event.keyCode == 9) { // tab or maj+tab

                // get list of all children elements in given object
                var children = $this.find('*');

                // get list of focusable items
                var focusableItems = children.filter(focusableElementsString).filter(':visible');

                // get currently focused item
                var focusedItem = $(document.activeElement);

                // get the number of focusable items
                var numberOfFocusableItems = focusableItems.length;

                var focusedItemIndex = focusableItems.index(focusedItem);

                if (!event.shiftKey && (focusedItemIndex == numberOfFocusableItems - 1)) {
                    focusableItems.get(0).focus();
                    event.preventDefault();
                }
                if (event.shiftKey && focusedItemIndex == 0) {
                    focusableItems.get(numberOfFocusableItems - 1).focus();
                    event.preventDefault();
                }


            }

        })
        .on("keyup", ":not(#js-modal)", function(event) {
            var $js_modal = $('#js-modal'),
                focusedItem = $(document.activeElement),
                in_jsmodal = focusedItem.parents('#js-modal').length ? true : false,
                $close = $('#js-modal-close');

            if ($js_modal.length && event.keyCode == 9 && in_jsmodal === false) { // tab or maj+tab
                $close.focus();
            }

        })
        .on('focus', '#js-modal-tabindex', function() {
            var $close = $('#js-modal-close');

            $close.focus();
        });


});