20 lines
829 B
Markdown
20 lines
829 B
Markdown
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Middleware to turn off caching
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==============================
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[](https://travis-ci.org/helmetjs/nocache)
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It's possible that you've got bugs in an old HTML or JavaScript file, and with a cache, some users will be stuck with those old versions. This will (try to) abolish all client-side caching.
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```javascript
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const nocache = require('nocache')
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app.use(nocache())
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```
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This sets four headers, disabling a lot of browser caching:
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- `Cache-Control: no-store, no-cache, must-revalidate, proxy-revalidate`
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- `Pragma: no-cache`
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- `Expires: 0`
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- `Surrogate-Control: no-store`
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Caching has performance benefits, and you lose them here. It's also possible that you'll introduce *new* bugs and you'll wish people had old resources cached, but that's less likely.
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