How to deal with front-end responsive images?

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Today’s content:How to deal with front-end responsive images?

The goal when working with front-end responsive images is to provide the best quality and performance of images across different devices and screen sizes. This usually involves selecting images of appropriate sizes and formats to load in different environments. Here are some ways to handle responsive images on the front end:

1. Image compression

  • Use an image editing tool such as Photoshop or an online image compression tool such as TinyPNG to reduce the size of the image file to reduce loading time. Compressed images should maintain sufficient quality to remain visually appealing.

2. Use appropriate image formats

  • Choose an appropriate image format. Commonly used image formats include JPEG, PNG, and WebP. JPEG is suitable for photos and progressive images, PNG is suitable for transparent images, and WebP is a modern format that provides better compression and quality. Choose the best format based on browser support.

3. Image scaling

  • Provides images in multiple sizes and loads them according to different screen sizes and resolutions. This can be achieved through the HTML element or the srcset attribute. For example:
<picture>
  <source srcset="image-large.jpg" media="(min-width: 800px)">
  <source srcset="image-medium.jpg" media="(min-width: 400px)">
  <img src="image-small.jpg" alt="Responsive Image">
</picture>

This will select the appropriate size image to load based on the device’s screen width.

4. Responsive image framework

  • Use a responsive image framework such as Responsive Images Community Group (RICG) or Picturefill to automatically handle image selection and loading.

5. srcsetattribute

  • Use HTML’s srcset attribute, which allows you to provide multiple source files of different sizes for images and let the browser select the appropriate image based on the device’s screen size and resolution. For example:
<img src="image-small.jpg" srcset="image-medium.jpg 800w, image-large.jpg 1200w" alt="Responsive Image">

6. sizesproperty

  • Use HTML’s sizes attribute, which specifies the dimensions of the image at different viewport widths. For example:
<img src="image-small.jpg" srcset="image-medium.jpg 800w, image-large.jpg 1200w" alt="Responsive Image" sizes="(max- width: 600px) 100vw, (max-width: 1200px) 50vw, 25vw">

This tells the browser to allocate different view widths at different viewport widths to select the appropriate image.

7. Lazy loading of images

  • Use image lazy loading technology to delay loading images until they come into view of the user. This can be achieved through the HTML loading="lazy" attribute.
<img src="image.jpg" alt="Lazy-loaded Image" loading="lazy">

The above methods can help you implement responsive images on the front end, provide a better user experience and speed up page loading. Based on project needs and performance optimization requirements, you can choose the method that suits your scenario.

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Review of this article

  • ? Column introduction
      • 1. Image compression
      • 2. Use appropriate image formats
      • 3. Image scaling
      • 4. Responsive image framework
      • 5. `srcset` attribute
      • 6. `sizes` attribute
      • 7. Lazy loading of images
  • ?Write at the end