explaingit

helmetjs/cross-origin-resource-policy

Analysis updated 2026-08-10 · repo last pushed 2021-04-17

3Audience · developerComplexity · 2/5DormantSetup · easy

TLDR

A deprecated security module that set browser headers controlling which websites can load your images, fonts, and scripts. Its code has been merged into the Helmet toolkit, use Helmet instead.

Mindmap

mindmap
  root((repo))
    What it does
      Sets security headers
      Controls resource loading
      Prevents cross-origin misuse
    Status
      Deprecated standalone
      Merged into Helmet
      Use Helmet instead
    Use cases
      Protect images and fonts
      Secure script loading
      Browser resource policies
    Audience
      Web developers
      Security-conscious teams
      Node.js projects

Code map

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filefunction / class

What do people build with it?

USE CASE 1

Set browser headers to control which external sites can load your images, fonts, and scripts.

USE CASE 2

Migrate from this standalone module to the Helmet toolkit for consolidated browser security protections.

What is it built with?

Node.jsHTTP headers

How does it compare?

helmetjs/cross-origin-resource-policy000madz000/payload-test-api-route-handler0marildo/imago
Stars333
LanguageTypeScriptPython
Last pushed2021-04-17
MaintenanceDormant
Setup difficultyeasyeasyeasy
Complexity2/52/52/5
Audiencedeveloperdevelopergeneral

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min

This module is deprecated, install Helmet instead and use its built-in cross-origin resource policy support.

No license is mentioned in this README, check the Helmet repository for current license details.

In plain English

Cross-origin-resource-policy is a small security module that has been folded into a larger project called Helmet. Rather than existing as its own standalone package, its code now lives inside the Helmet repository, so anyone looking for it should head there instead. In its original form, this module helped web developers set a security header that tells browsers which other websites are allowed to load resources like images, fonts, or scripts from your site. This kind of protection matters because without it, a malicious site could potentially embed your resources in ways you didn't intend. Helmet, the project it now belongs to, is a popular toolkit that bundles together many of these browser security headers into one convenient package, so it makes sense that this piece was absorbed there. The README doesn't go into further detail beyond pointing readers to the Helmet repository. Developers who were using this module on its own would now find it as part of Helmet's broader set of protections, and the migration is essentially a matter of switching to the combined package. This consolidation is a common pattern in open-source projects: when a standalone tool becomes one piece of a larger, related toolkit, maintaining it separately stops making sense. For anyone who relied on this module, the Helmet repository is where they'll find the current code, documentation, and any future updates.

Copy-paste prompts

Prompt 1
Show me how to use Helmet to set the Cross-Origin-Resource-Policy header and control which websites can load my images, fonts, and scripts.
Prompt 2
Help me migrate from the standalone cross-origin-resource-policy module to Helmet, including what headers to configure and how.
Prompt 3
Explain how Cross-Origin-Resource-Policy differs from CORS and set up Helmet to apply the right resource policy for my public API.

Frequently asked questions

What is cross-origin-resource-policy?

A deprecated security module that set browser headers controlling which websites can load your images, fonts, and scripts. Its code has been merged into the Helmet toolkit, use Helmet instead.

Is cross-origin-resource-policy actively maintained?

Dormant — no commits in 2+ years (last push 2021-04-17).

What license does cross-origin-resource-policy use?

No license is mentioned in this README, check the Helmet repository for current license details.

How hard is cross-origin-resource-policy to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is cross-origin-resource-policy for?

Mainly developer.

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