DNS prefetch control header for Express

This middleware lets you set the X-DNS-Prefetch-Control to control browsers' DNS prefetching. Read more about it on MDN and on Chromium's docs.

Usage:

const dnsPrefetchControl = require('dns-prefetch-control')

// Set X-DNS-Prefetch-Control: off
app.use(dnsPrefetchControl())

// Set X-DNS-Prefetch-Control: off
app.use(dnsPrefetchControl({ allow: false }))

// Set X-DNS-Prefetch-Control: on
app.use(dnsPrefetchControl({ allow: true }))

Changelog

0.3.0 - 2019-09-01

Changed

• Dropped support for Node <8

0.2.0 - 2019-05-11

Added

• Added TypeScript type definitions. See #2 and helmetjs/helmet#188
• Created a changelog

Changed

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

Changes in versions 0.1.0 and below can be found in Helmet's changelog.