---
title: "Discussion on \"cross origin policy in browser\" | Hashnode"
description: "Discussion on \"cross origin policy in browser\". We all run localhost on our browsers to get output of our code written in HTML/CSS, React, JS, or any other such... & also we have encounter a warning!\n\nlocalhost running on 3000, do you want to run on 3001, we always click for yes,\n\nBut ever noticed..."
url: "https://hashnode.com/posts/cross-origin-policy-in-browser/671e3272c98b621632814f16"
---

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# [cross origin policy in browser](https://aryansharma.hashnode.dev/cross-origin-policy-in-browser?utm_source=hashnode&utm_medium=feed)

We all run localhost on our browsers to get output of our code written in HTML/CSS, React, JS, or any other such... & also we have encounter a warning! localhost running on 3000, do you want to run on 3001, we always click for yes, But ever noticed...

Oct 27, 2024 · 3 min read · aryansharma.hashnode.dev  
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-   [#google-chrome-browser](https://hashnode.com/tag/google-chrome-browser)
-   [#aryan-sharma](https://hashnode.com/tag/aryan-sharma)

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