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67 lines
1.3 KiB
Markdown
67 lines
1.3 KiB
Markdown
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# vm-browserify
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emulate node's vm module for the browser
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[](https://travis-ci.org/browserify/vm-browserify)
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# example
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Just write some client-side javascript:
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``` js
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var vm = require('vm');
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window.addEventListener('load', function () {
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var res = vm.runInNewContext('a + 5', { a : 100 });
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document.querySelector('#res').textContent = res;
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});
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```
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compile it with [browserify](http://github.com/substack/node-browserify):
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```
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browserify entry.js -o bundle.js
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```
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then whip up some html:
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``` html
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<html>
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<head>
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<script src="/bundle.js"></script>
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</head>
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<body>
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result = <span id="res"></span>
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</body>
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</html>
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```
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and when you load the page you should see:
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```
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result = 105
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```
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# methods
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## vm.runInNewContext(code, context={})
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Evaluate some `code` in a new iframe with a `context`.
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Contexts are like wrapping your code in a `with()` except slightly less terrible
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because the code is sandboxed into a new iframe.
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# install
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This module is depended upon by browserify, so you should just be able to
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`require('vm')` and it will just work. However if you want to use this module
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directly you can install it with [npm](http://npmjs.org):
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```
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npm install vm-browserify
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```
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# license
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MIT
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