How to implement responsive adaptation of the home page banner list images on different devices?

In today's network environment with multiple devices coexisting, responsive web design is no longer an option, but a necessity.Especially for the "front door" of a website - the homepage banner image, its display effect on different devices directly affects the first impression of users and the professionalism of the website.As an experienced website operation expert, I am well aware of the powerful and flexible content management capabilities of AnQiCMS (AnQi CMS).Today, let's delve into how to achieve elegant responsive adaptation of the home page banner images on different devices by utilizing the various functions and content operation strategies of AnQiCMS.

Responsive Design Philosophy of AnQiCMS

AnQiCMS as a dedicated enterprise-level content management system providing efficient and customizable solutions, offers multiple responsive design supports. It does not adhere to a single adaptation mode, but instead provides users with three flexible website modes:Adaptive, code adaptation, and PC+mobile independent sitesThese three modes have different focuses, providing different strategy foundations for responsive handling of Banner images:

  • 自适应模式 (Responsive Design):This is the most mainstream model at present, which adjusts the content and layout of the website according to the screen size of the accessing device through a set of code and CSS media queries.This means the image itself or its container will scale intelligently for Banner images.
  • 代码适配模式 (Adaptive Design): EnglishThis pattern may load different style sheets or a small amount of different HTML structures on different devices, but the core content and template structure remain unified.It provides finer control than adaptive mode while avoiding the complexity of a completely independent site.
  • PC+mobile独立站点模式: EnglishBy name, this mode allows you to maintain two completely independent templates and content structures for desktop and mobile, and even bind different domains (such aswww.example.comandm.example.comThis brings the utmost customization freedom to the Banner image, but also means higher maintenance costs.

Understanding these patterns is the first step in achieving Banner responsive adaptation, as different patterns will guide us to adopt different technical solutions.

第一步：准备高质量的 Banner 图片 English

No matter which responsive strategy is adopted, high-quality original images are the cornerstone. AnQiCMS provides many conveniences in terms of image management and optimization:

  1. Upload high-resolution original images:Always upload the Banner image with the highest resolution and quality you own. AnQiCMS will automatically handle the subsequent compression and format conversion.
  2. Utilize the image processing feature of AnQiCMS:In AnQiCMS backend, you can find multiple image optimization settings under 'Global Settings' -> 'Content Settings': they also apply to Banner images.
    • Whether to automatically compress large images:Enable this feature and set a reasonable 'Auto Compress to Specific Width', which can effectively reduce the size of large image files and speed up loading.For example, setting the width to 1920px can ensure clarity on most desktop monitors while avoiding excessively large files.
    • Whether to start Webp image format:WebP format images are typically 25-35% smaller than JPEG and PNG files while maintaining similar visual quality.Enable this feature can significantly improve the image loading performance.
    • Thumbnail processing methods and dimensions:Although banner images are usually not used directly as 'thumbnails', AnQiCMS's image processing mechanism can generate different sized image variants when uploaded. Through reasonable configuration, these variants can be used for front-end responsive image schemes (such assrcset），Let the browser select the most suitable image according to the device conditions.
  3. Pay attention to the file size of the image: Even high-resolution images should be optimized for file size as much as possible to avoid unnecessary details causing slow loading.AnQiCMS's automatic compression and WebP conversion feature is born for this.

第二步：灵活运用 AnQiCMS 模板标签展示 Banner (English)

AnQiCMS Through its concise and powerful template tags, makes the data acquisition of Banner images easy. The core is{% bannerList %}Tags, it allows you to easily get the list of Banner images configured in the background:

{% bannerList banners %}
    {% for item in banners %}
    <a href="{{item.Link}}" target="_blank">
        <img src="{{item.Logo}}" alt="{{item.Alt}}" />
        {# 您可以在这里添加其他内容，如标题或描述 #}
        <h5>{{item.Title}}</h5>
    </a>
    {% endfor %}
{% endbannerList %}

In the above code:

  • {{item.Logo}}The original image of the Banner or the main image address processed by the AnQiCMS backend.
  • {{item.Alt}}Provide the Alt text for the image, which is crucial for SEO and accessibility.
  • {{item.Link}}and{{item.Title}}Provide the link and title for the Banner.

Now, we have the URL of the Banner image. Next, it's about how to implement its responsive adaptation on the front-end.

Core responsive adaptation strategy: technical implementation

Based on the responsive mode adopted by your website and the requirements for control granularity, there are several core strategies available:)

Strategy one: Image adaptation based on CSS media queries

This is the most basic and most commonly used method, especially suitable for websites in 'auto-adaptive' mode.The core idea is to make the image width adapt to the container and may adjust the image style or background image at different breakpoints.

  1. Basic image scaling:Ensure that your Banner image can scale with the container size. Add the following rule in CSS:

    .banner-container img {
    max-width: 100%; /* 图片宽度最大为父容器的100% */
    height: auto;    /* 高度自动调整，保持图片比例 */
    display: block;  /* 消除图片底部的空白间隙 */
}

  2. Background image switch (for scenes where Banner is used as a background):If your Banner image is used as somedivorsectionThe background, which can be loaded with different background images on different screen sizes via media queries:

    .hero-banner {
    background-image: url('{{item.Logo}}'); /* 默认加载大图 */
    background-size: cover; /* 背景图片覆盖整个容器 */
    background-position: center center; /* 背景图片居中 */
    height: 500px; /* 示例高度，可根据需求调整 */
    width: 100%;
}


@media (max-width: 768px) {
    .hero-banner {
        /* 在小屏幕设备上加载一个尺寸更小的图片 */
        background-image: url('{{item.Logo|thumb}}'); /* 假设AnQiCMS提供了缩略图的过滤器 */
        height: 300px; /* 调整移动端高度 */
    }
}

    It is worth mentioning that,AnQiCMS template filtersthumb(such as{{ item.Logo|thumb }}This can directly output the image URL of the corresponding size according to the thumbnail rule configured on the backend. This provides convenience for easily switching between different sizes of background images in media queries.

Strategy two: Use HTML5srcsetor<picture>Element

This method provides a more intelligent image loading mechanism, allowing the browser to automatically select the most suitable image source based on the device's pixel density (DPR) and viewport width, thus achieving dual optimization of performance and visual quality.This also applies to the 'Adaptive Mode' or scenarios with high requirements for image loading performance.

  1. srcsetProperties:Suitable for different resolutions or versions with different widths of the same image. You can provide multiple image sources, and the browser will intelligently select:

    {% bannerList banners %}
    {% for item in banners %}
    <a href="{{item.Link}}" target="_blank">
        <img src="{{item.Logo}}"
             srcset="{{item.Logo|thumb}} 768w, {{item.Logo}} 1200w"
             sizes="(max-width: 768px) 100vw, 1200px"
             alt="{{item.Alt}}">
    </a>
    {% endfor %}
{% endbannerList %}
    • src="{{item.Logo}}"As a fallback, when the browser does not supportsrcsetuse.
    • srcset="{{item.Logo|thumb}} 768w, {{item.Logo}} 1200w"Tells the browser that there are two images available.item.Logo|thumbIs for images targeting a viewport width of up to 768px (assuming the backend is configured with a small thumbnail size),item.LogoIs for images targeting a viewport width of up to 1200px. The number after thewRepresents the inherent width of the image.