![]() ![]() Redirects are cached for 10 minutes at the CDN, 1 minute in browsers. This is the latest version when no version is specified, or the maxSatisfying version when a semver version is given. URLs that do not specify a package version number redirect to one that does. This works because npm does not allow package authors to overwrite a package that has already been published with a different one at the same version number.īrowsers are instructed (via the Cache-Control header) to cache assets indefinitely (1 year). The CDN caches files based on their permanent URL, which includes the npm package version. ![]() This feature is very experimental Cache Behavior any/file?meta) ?module Expands all “bare” import specifiers in JavaScript modules to unpkg URLs. Query Parameters ?meta Return metadata about any file in a package as JSON (e.g. use a “bare” URL), unpkg will serve the file specified by the unpkg field in package.json, or fall back to main.Īppend a / at the end of a URL to view a listing of all the files in a package. may also use a semver range or a tag instead of a fixed version number, or omit the version/tag entirely to use the latest tag. ![]()
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