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How to Steal Any React Component

fant.io · 2,687 words · saved by 1 readers

I'll show you how to steal any component on a production React website's components without source code or access to the repo - just the website running in our browser. For example, here is Cursor web's agent sidebar. Normally, you'd need the source code. But here's the thing - React actually leaves a lot of breadcrumbs in the browser. More than you might think. And if we're clever about collecting these breadcrumbs and feeding them to an LLM, we can reconstruct the original components. So that's what we're going to do. By the end, we'll have a working React component written by the help from an LLM. Let's start from the very basics. Here's something you need to understand first. When you're looking at a React app in the browser, there are actually two trees living in memory. Let's use this website as an example. The DOM is the browser's representation of the page and consists of HTML elements: divs, buttons, spans, etc. You can see it in the Elements tab of your dev tools. This is wha

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