This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The nonce property of the HTMLOrForeignElement interface returns the cryptographic number used once that is used by Content Security Policy to determine whether a given fetch will be allowed to proceed.

In later implementations, elements that have a nonce attribute only expose it to scripts (and not to side-channels like CSS attribute selectors). 


var nonce = HTMLElement.nonce
HTMLElement.nonce = nonce


A cryptographic nonce.


Specification Status Comment
HTML Living Standard
The definition of 'nonce' in that specification.
Living Standard Initial definition.

Browser Compatibility

No compatibility data found. Please contribute data for "api.HTMLOrForeignElement.nonce" (depth: 1) to the MDN compatibility data repository.