How deeply does ASP.NET Core in Action, 3e cover cache busting?

Defines manual query strings and explains content hashing with the Append Version Tag Helper, but does not detail caching internals.

Cache busting

As explained in ASP.NET Core in Action, 3e

Cache busting is a technique that changes a resource's cache identity when its contents change so clients retrieve the latest version.

Cache busting changes a resource’s cache identity when its contents change. A query parameter such as ?v=1 lets browsers reuse an unchanged file; changing it to ?v=2 triggers a fresh request for the updated file. section 18.4

Manually changing version values in every image, stylesheet, or script reference is easy to miss. ASP.NET Core’s Append Version Tag Helper avoids that work by hashing the referenced file and appending the hash as a query string. section 18.4

Version a script automatically

Add the attribute to a static asset: <script src="~/js/site.js" asp-append-version="true"></script>. The rendered URL receives a content-based value, such as /js/site.js?v=EWaMeWsJBYWmL2g_KkgXZQ5nPe. The value stays stable until the file changes, allowing browser caching while ensuring updated JavaScript is requested. section 18.4

<script src="~/js/site.js" asp-append-version="true"></script>

Inspect the concise markup pattern for enabling content-based cache busting on a script. section 18.4

How ASP.NET Core in Action, 3e covers it

liveBook manning.com

Read ASP.NET Core in Action, 3e on liveBook Get the book at manning.com

Also explained in

liveBook manning.com

Pro ASP.NET Core 7, Tenth EditionA cache-busting value is a changing resource identifier component that causes clients to retrieve a new version instead of using a stale cached file.

Compare how 2 books explain cache busting →

Related concepts

append version tag helperimplemented by · The Append Version Tag Helper appends a content-based version query parameter to a static resource URL.
cachingcontrasts with · Caching is the practice of storing reusable data or computation results so later access can avoid repeating retrieval or computation.
SQLuses · SQL is a standardized declarative language for defining, querying, and manipulating data and structures in relational database systems.

This explainer was generated by Manning's knowledge graph from the text of ASP.NET Core in Action, 3e. The section links point to the parts of the book it draws on.