css image too big

The size of images in CSS has an important impact on the page loading speed and user experience of the website. If the image is too large, it will affect the loading speed of the web page, increase the user churn rate, and also occupy the bandwidth resources of the server and increase the cost of website maintenance. Therefore, when designing with CSS, you need to pay attention to the size of the image to avoid problems caused by excessively large images.

First of all, when designing a website, if you need to use pictures, you should first optimize the pictures and reduce the size of the picture files before using them in the website. Regarding image optimization, there are several basic methods that can provide reference. First, you can use image editing tools to compress images. There are many image editing tools on the market today that can compress images, such as Photoshop, etc. The compressed image size will be reduced, thereby reducing the occupation of server bandwidth resources and improving website performance.

Secondly, using appropriate image formats can effectively reduce file size. For images on websites, it is more common to use the JPEG format than the PNG format because images in the JPEG format can be compressed smaller and can better preserve details and colors for images with more complex content such as photos. . For pictures with simple image content, transparency or animated effects, it is recommended to use PNG or GIF format.

In addition to optimizing images, you can also adjust the size of images through CSS related attributes. For example, setting the width and height attributes of an image in CSS can control the size of the image. It should be noted that if you need to enlarge or reduce the image, try to avoid setting a value that is too high or too low to avoid distortion or pixelation of the image.

In addition, lazy loading technology can also be used to optimize image loading speed. Lazy loading is a mode that can delay loading. When the page is loaded, only the content in the current visible area will be loaded, while other content on the page will be loaded frame by frame during the scrolling process, thus greatly shortening the page's loading time. Loading time. At this time, only when the user scrolls down, the images need to be loaded one by one, thereby reducing the pressure on the server and improving the performance and user experience of the website.

To sum up, CSS images that are too large will have a great impact on the performance and user experience of the website. Therefore, when designing CSS, you should optimize and properly compress images, use appropriate image formats, resize images, and use lazy loading technology to improve website performance and user experience.

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