
Research
/Security News
Critical Vulnerability in NestJS Devtools: Localhost RCE via Sandbox Escape
A flawed sandbox in @nestjs/devtools-integration lets attackers run code on your machine via CSRF, leading to full Remote Code Execution (RCE).
jsx-async-runtime
Advanced tools
An asynchronous JSX runtime without dependencies to be used as html template engine.
An asynchronous JSX runtime without dependencies to be used as html template engine for server or browser.
This runtime was initially developed for Jeasx, but has a value of its own. Its main focus is to keep things simple, reliable and fast.
You can find more information about using this runtime as template engine in the Jeasx documentation.
npm i jsx-async-runtime
To make use of the jsx-async-runtime
, you need to configure your transpiler to utilize this package for transforming the JSX syntax.
If you are using TypeScript for transpiling your code base, simply set these options in your tsconfig.json
:
{
"compilerOptions": {
"jsx": "react-jsx",
"jsxImportSource": "jsx-async-runtime"
}
}
If you're using jsx-async-runtime
as template engine, you might want to include data from an asynchronous operation in the resulting markup. To simplify this process, you can make your components asynchronous and send async requests from within them.
Please note: jsx-async-runtime
doesn't escape html entities per default, so rendering user input makes your application vulnerable to cross site scripting. jsx-async-runtime
exports a utility function called escapeEntities
which can be used to render input from uncontrolled sources.
You can study the example project to learn about existing features.
import { escapeEntities, jsxToString } from "jsx-async-runtime";
export default function App() {
return (
<>
{`<!DOCTYPE html>`}
<html>
<head>
<meta charset="utf-8" />
<title>Todos</title>
</head>
<body>
<Header label="<Todos>" />
<TodoList quantity={3} />
</body>
</html>
</>
);
}
function Header({ label }) {
return (
<section
style={{
"background-color": "red",
"padding-bottom": "1rem",
}}
>
<h1 style="color: white; text-align: center">{escapeEntities(label)}</h1>
</section>
);
}
async function TodoList({ quantity }) {
const { todos } = await (await fetch("https://dummyjson.com/todos")).json();
return (
<table class="table">
<thead class={{ thead: true, striped: false, sticky: true }}>
<tr>
<th>Label</th>
<th>Status</th>
</tr>
</thead>
<tbody class="tbody striped">
{todos.slice(0, quantity).map(({ todo, completed }) => (
<tr>
<td>
<label for="todo">{escapeEntities(todo)}</label>
</td>
<td>
<label for="status">{completed ? "yes" : "no"}</label>
</td>
</tr>
))}
</tbody>
</table>
);
}
console.log(await jsxToString(<App />));
FAQs
An asynchronous JSX runtime without dependencies to be used as html template engine.
The npm package jsx-async-runtime receives a total of 395 weekly downloads. As such, jsx-async-runtime popularity was classified as not popular.
We found that jsx-async-runtime demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Research
/Security News
A flawed sandbox in @nestjs/devtools-integration lets attackers run code on your machine via CSRF, leading to full Remote Code Execution (RCE).
Product
Customize license detection with Socket’s new license overlays: gain control, reduce noise, and handle edge cases with precision.
Product
Socket now supports Rust and Cargo, offering package search for all users and experimental SBOM generation for enterprise projects.