What are the best practices for using ETags in web development?
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What are the best practices for using ETags in web development?
ETags are essential for caching and optimizing web performance. Best practices include using strong ETags, ensuring they are unique for each resource, and updating them when the resource changes.
Can you explain what a strong ETag is?
A strong ETag is a unique identifier that changes whenever the resource changes. It ensures that clients receive the most up-to-date version of the resource.
How do ETags improve caching?
ETags help browsers determine if the cached version of a resource is still valid. If the ETag matches, the browser can use the cached version instead of downloading it again, saving bandwidth and improving load times.
Are there any downsides to using ETags?
Yes, one downside is that ETags can add overhead to server responses. Additionally, if not implemented correctly, they can lead to cache inconsistencies.
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