23 lines
573 B
Markdown
23 lines
573 B
Markdown
# Middleware to turn off caching
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This Express middleware sets some HTTP response headers to try to disable client-side caching.
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To use it:
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```javascript
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const nocache = require("nocache");
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// ...
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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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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.
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