In website operation, page loading speed and user experience are crucial aspects.Especially for articles with a large number of images, image loading often becomes the 'culprit' that slows down the page speed.This is where the image lazy loading (Lazy Loading) technology becomes particularly crucial.An auto CMS understands this well, providing a simple and efficient way to control the automatic lazy loading of images in article content, helping your website to soar to new heights in performance and user experience.

Why is image lazy loading so important?

Image lazy loading is a strategy that defers the loading of images that are not in the viewport (i.e., outside the user's current screen).This means that when a user visits your page, only the images in the visible area of the first screen will load immediately, while other images will start loading as the user scrolls the page and the images are about to enter the viewport.

  1. Significantly improve page loading speed:Reduced the amount of resources needed for the first page load, which speeds up page rendering. This has a positive impact on search engine optimization (SEO) and user retention rate.
  2. Save bandwidth resources:Users do not need to load all images, especially in mobile network environments, which can effectively reduce data consumption and improve user experience.
  3. Improved user experience:The page content is displayed to the user more quickly, avoiding long periods of a blank screen, making the browsing process smoother.
  4. Beneficial for SEO ranking:The page load speed is one of the important indicators that search engines use to measure the quality of a website, lazy loading helps improve the Core Web Vitals score of the website, which may result in better search rankings.

How to implement lazy loading of images in article content of Anqi CMS?

The Anqi CMS provides a very intuitive and powerful template tag control method for handling lazy loading of images in article content. When we are dealing with the content of the article (ContentAfter inserting images into the field, these images will be loaded along with the page by default. However, by cleverly utilizingarchiveDetailWe can indicate the system to add special lazy loading attributes when rendering these images, labeled as such.

The core is inlazyThe application of parameters. For example, you can set it like this in the template:

<div>文档内容：{% archiveDetail archiveContent with name="Content" lazy="data-src" %}{{archiveContent|safe}}</div>

Here are thelazy="data-src"Just inform AnqiCMS that, in outputting article content,<img>do not use the attribute directly when labeling,srcto place the real address of the image, but move its address to thedata-srcattribute. Usually,srcThe property can be set to a very small placeholder image or left blank to avoid the browser displaying a broken icon when the image is not loaded.data-srcIs an attribute name conventionally used by the front-end lazy loading library, but you can customize this attribute name according to the requirements of the front-end library you choose (for exampledata-originaletc.).

It is worth noting that,ContentThe field may contain HTML content, in order to ensure that these HTML codes are parsed correctly by the browser rather than being escaped as plain text, we need to use|safeFilter. Thus, AnqiCMS will ensure that the output image HTML structure is complete and includes the lazy loading tags we specify when generating pages.

How to realize lazy loading effect in front-end?

AnqiCMS has completed the processing of backend data and the preparation of HTML structure, but the actual lazy loading effect still needs to be realized with the cooperation of frontend JavaScript. The frontend JavaScript library will listen to the page scroll event, when it hasdata-srcThe image of the attribute (or other custom attribute) enters the user's viewport, and JavaScript will trigger an action to assigndata-srcthe real address of the image insrcProperties, thus achieving image lazy loading.

There are many excellent lazy loading libraries available, such as using the browser's nativeIntersection Observer APIRecommended implementation in modern browsers, or use lightweight third-party libraries.The choice of library depends on your project requirements and technical stack preference, but the core principles are consistent: to delay the loading of images from page initialization to when the images are about to appear on the screen.

**Practical Tips and Considerations

  1. Treat images differently:Although lazy loading can bring many benefits, not all images are suitable for lazy loading.通常，首屏可见区域（Above-the-Fold）的图片应立即加载，以保证用户初次访问时的体验。srcproperties.
  2. Use placeholders:For lazy-loaded images, it is recommended to use low-quality image placeholders (LQIP) or solid color backgrounds to avoid displaying blank areas before loading, which can affect aesthetics and user perception.
  3. Compatibility test:After implementing lazy loading, it is essential to conduct thorough testing on various devices and network environments to ensure stable and reliable functionality, and that it does not negatively impact page interaction.
  4. Combine image optimization:In addition, the Anqi CMS itself also provides image compression, WebP format conversion, thumbnail processing, and other functions (which can be configured in "Content Settings").Combine these built-in image optimization methods to further improve the website's loading speed and image display quality, working in synergy with lazy loading to provide users with an ultimate browsing experience.

By means of the above method, users of Anqi CMS can beautifully control the lazy loading behavior of article content images, not only optimizing the performance of the website, but also greatly enhancing the browsing experience of visitors.

Common Questions (FAQ)

Q1：Lazy loading will be applied automatically to all images, including website Logo and Banner?A1：By default, the security CMS provided bylazyThe parameter is mainly used to process articlesContentThe image within the field. Logos, banners, or images hardcoded in templates on the website need to be manually added corresponding lazy loading attributes or controlled through frontend JavaScript; they will not be loaded automatically.archiveDetailtagslazyThe impact of the parameter. It is usually not recommended to lazy load the Logo and Banner visible on the first screen to ensure the initial loading experience.

Q2：How to choose a suitable frontend lazy loading JavaScript library to work with Anqi CMS?A2：When choosing a frontend library, it is recommended to consider libraries based onIntersection Observer APIThe lightweight library, as it leverages the browser's native capabilities, offers better performance.If compatibility with old browsers is needed, libraries with polyfills or graceful degradation solutions may need to be considered.vanilla-lazyloadorlozad.js.

Q3: Does lazy loading of images affect the SEO indexing?A3：If implemented properly, lazy loading of images will not have a negative impact on SEO. Modern search engine crawlers are already able to understand and handle images loaded throughdata-srcImages implemented with lazy loading properties.The key is to ensure that the image can obtain its real URL and ALT text when it is indexed by the search engine.In conjunction with the lazy loading settings of the AnQi CMS, and choosing a front-end lazy loading library friendly to SEO, there usually won't be any problems in this regard.