H5 browser caching mechanism and best practices

H5 browser caching is a mechanism for storing web page data and resources, which can speed up subsequent access. Best practices include: setting the appropriate cache time; using strong cache; rational use of negotiated cache; controlling cache policies; testing and monitoring.

H5 browser caching mechanism and best practices

What is H5 browser cache?

H5 browser caching is a mechanism for storing web page data and resources, which can speed up subsequent access. When a user accesses a web page, the browser stores the page's resources (such as HTML, CSS, JavaScript files, and images) on the local computer. When the user visits the page again, the browser can use these cached files to avoid duplicate downloads, which significantly improves loading speed.

H5 browser caching mechanism

H5 browser caching policies usually follow the following mechanisms:

• Negotiation cache: The browser sends a request to the server, and the server returns a response with a cache instruction, instructing the browser to handle the cache.
• Strong cache: The resource has a clear cache time during which the browser loads the resource directly from the cache without making a request to the server.
• Negotiation cache: The resource does not have a clear cache time, and the browser will send a request to the server, and the server will decide whether to use the cache.
• Forced cache: The browser always uses cache resources no matter what command the server returns.

Best Practices

Optimizing H5 browser cache can effectively improve page performance. Here are some best practices:

• Set the appropriate cache time: Set the appropriate cache time according to the resource type and frequency of change.
• Use Strong Caching: Enable strong caching for static resources (such as images, CSS, JavaScript files) to avoid unnecessary network requests.
• Make rational use of negotiation cache: For resources that are frequently updated, use negotiation cache to ensure that the browser uses the latest version.
• Control cache policy: Use HTTP headers (such as Cache-Control , Expires ) to control the cache behavior of the browser.
• Test and Monitor: Test and monitor cache policies regularly to ensure they are effective and in line with expectations.

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