How to Website image appropriate size by coding ?

How to Website image appropriate size by coding ?

To appropriately size all images using code, you can use server-side or client-side techniques. Here are a few approaches.

 

Server-side image resizing:

·         Determine the required image dimensions based on the context, such as device type or layout.

·         Use server-side programming languages (e.g., PHP, Python, Node.js) or image processing libraries (e.g., GD Library, ImageMagick) to resize the images to the desired dimensions.

·         Store the resized images separately or overwrite the original images with the resized versions.

Client-side image resizing:

·         Include a JavaScript library for client-side image resizing, such as HTML5 Canvas or a dedicated image manipulation library like CamanJS or Resizer.js.

·         Identify the images to be resized, either by targeting specific elements or by applying a class or data attribute to them.

·         Write JavaScript code to iterate through the images and resize them to the appropriate dimensions. This can be done by creating a new <img> element with the resized dimensions or by modifying the width and height attributes of the existing <img> element.

·         Attach event listeners to handle window resizing or other events that may require re-evaluating the appropriate image sizes and trigger the resizing logic accordingly.

Responsive images using HTML and CSS:

·         Use the <picture> element along with <source> elements to define different image sources based on media queries or device characteristics.

·         Specify multiple <source> elements with different image sizes and formats (e.g., WebP, JPEG) using the srcset and type attributes.

·         Include a fallback <img> element inside the <picture> element with the smallest image size suitable for older browsers that do not support the <picture> element.

·         Use CSS to define the maximum width and height of the image containers to ensure the images are appropriately sized on different devices.

Lazy loading:

·         Implement lazy loading using JavaScript libraries like LazyLoad or Intersection Observer API.

·         Add a placeholder image or a low-quality version of the image initially.

·         Observe scroll events or other triggers to detect when an image becomes visible in the viewport.

·         Load the appropriate image by updating the src attribute with the actual image URL or by switching the CSS background image property.

By using these techniques, you can dynamically resize and deliver appropriately-sized images to optimize data usage, load times, and improve the overall user experience. Choose the method that suits your development environment and requirements.

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