瞭解如何編寫樣式系統的程式碼 understanding-how-to-code-for-the-aem-style-system

/**
 * JavaScript supporting Styles may be re-used across multi Component Styles.
 *
 * For example:
 * Many styles may require the Components Image (provided via an <img> element) to be set as the background-image.
 * A single JavaScript function may be used to adjust the DOM for all styles that required this effect.
 *
 * JavaScript must react to the DOMNodeInserted event to handle style-switching in the Page Editor Authoring experience.
 * JavaScript must also run on DOM ready to handle the initial page load rendering (AEM Publish).
 * JavaScript must mark and check for elements as processed to avoid cyclic processing (ie. if the JavaScript inserts a DOM node of its own).
 */
jQuery(function ($) {
    "use strict;"

    moment.locale("en");

    /**
     * Method that injects p element, containing the current pages last modified date/time, under the title text.
     *
     * Similar to the CSS Style application, component HTML elements should be targeted via the BEM class names (as they define the stable API)
     * and targeting "raw" elements (ex. "li", "a") should be avoided.
     */
    function applyComponentStyles() {

        $(".cmp-title--example").not("[data-styles-title-last-modified-processed]").each(function () {
            var title = $(this).attr("data-styles-title-last-modified-processed", true),
                url = Granite.HTTP.getPath() + ".model.json";

            $.getJSON(url, function(data) {
                var dateObject = moment(data['lastModifiedDate']),
                    titleText = title.find('.cmp-title__text');

                titleText.after($("<p>").addClass("cmp-title__last-modified-at").text("Last modified " + dateObject.fromNow()));
            });
        });
    }

    // Handle DOM Ready event
    applyComponentStyles();

    // Apply Styles when a component is inserted into the DOM (ie. during Authoring)
    $(".responsivegrid").bind("DOMNodeInserted", applyComponentStyles);
});