vm-browserify
Advanced tools
The vm-browserify npm package is a browser shim for Node.js's vm module. It allows you to run scripts in a sandboxed environment within the browser, similar to how you would in Node.js. This can be useful for executing code in a controlled and isolated context.
Running code in a sandbox
This feature allows you to execute a string of code in a new, isolated context. The sandbox object can be used to pass in and out values from the sandboxed environment.
var vm = require('vm-browserify');
var sandbox = { animal: 'cat' };
vm.runInNewContext('console.log(animal)', sandbox);Sandboxed-module is designed to make it easy to require modules with sandboxed globals, timers, and other Node.js features. It is more focused on sandboxing modules rather than arbitrary code execution.
emulate node's vm module for the browser
Just write some client-side javascript:
var vm = require('vm');
window.addEventListener('load', function () {
var res = vm.runInNewContext('a + 5', { a : 100 });
document.querySelector('#res').textContent = res;
});
compile it with browserify:
browserify entry.js -o bundle.js
then whip up some html:
<html>
<head>
<script src="/bundle.js"></script>
</head>
<body>
result = <span id="res"></span>
</body>
</html>
and when you load the page you should see:
result = 105
Evaluate some code in a new iframe with a context.
Contexts are like wrapping your code in a with() except slightly less terrible
because the code is sandboxed into a new iframe.
This module is depended upon by browserify, so you should just be able to
require('vm') and it will just work. However if you want to use this module
directly you can install it with npm:
npm install vm-browserify
MIT
1.1.2 - 2019-11-04
FAQs
vm module for the browser
The npm package vm-browserify receives a total of 7,555,099 weekly downloads. As such, vm-browserify popularity was classified as popular.
We found that vm-browserify demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 40 open source maintainers 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
Malicious Go packages are impersonating popular libraries to install hidden loader malware on Linux and macOS, targeting developers with obfuscated payloads.
Security News
Bybit's $1.46B hack by North Korea's Lazarus Group pushes 2025 crypto losses to $1.6B in just two months, already surpassing all of 2024's $1.49B total.
Security News
OpenSSF has published OSPS Baseline, an initiative designed to establish a minimum set of security-related best practices for open source software projects.