Middleware to turn off caching

This Express middleware sets some HTTP response headers to try to disable client-side caching.

To use it:

const nocache = require("nocache");

// ...

app.use(nocache());

This sets three headers, disabling a lot of browser caching:

• Cache-Control: no-store, no-cache, must-revalidate, proxy-revalidate
• Expires: 0
• Surrogate-Control: no-store

You may wish to do this if you want to ensure that users have up-to-date resources, or if you want to clear out an old version for some reason.

Changelog

4.0.0 - 2023-06-01

Removed

• Breaking: dropped Pragma header. See #26
• Breaking: dropped support for Node 14 and 15. Node 16+ is now required

3.0.4 - 2022-05-21

Changed

• Shrunk package size slightly

Removed

• Removed changelog from built package

3.0.3 - 2022-03-23

Changed

• Fixed TypeScript regression. See #21

3.0.2 - 2022-03-22

Changed

• Shrunk package size slightly

3.0.1 - 2021-06-22

Changed

• Fixed homepage metadata
• Removed some extraneous keywords

3.0.0 - 2021-06-03

Changed

• Updated documentation

Removed

• Dropped support for old Node versions. Node 12+ is now required

2.1.0 - 2019-05-05

Added

• Added TypeScript type definitions. See #17 and helmetjs/helmet#188
• Created a changelog

Changed

• Excluded some files from npm package
• Updated some package metadata

Changes in versions 2.0.0 and below can be found in Helmet's changelog.