| 1 | # vm-browserify
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| 2 |
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| 3 | emulate node's vm module for the browser
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| 4 |
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| 5 | [](https://travis-ci.org/browserify/vm-browserify)
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| 6 |
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| 7 | # example
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| 8 |
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| 9 | Just write some client-side javascript:
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| 10 |
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| 11 | ``` js
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| 12 | var vm = require('vm');
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| 13 |
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| 14 | window.addEventListener('load', function () {
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| 15 | var res = vm.runInNewContext('a + 5', { a : 100 });
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| 16 | document.querySelector('#res').textContent = res;
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| 17 | });
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| 18 | ```
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| 19 |
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| 20 | compile it with [browserify](http://github.com/substack/node-browserify):
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| 21 |
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| 22 | ```
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| 23 | browserify entry.js -o bundle.js
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| 24 | ```
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| 25 |
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| 26 | then whip up some html:
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| 27 |
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| 28 | ``` html
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| 29 | <html>
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| 30 | <head>
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| 31 | <script src="/bundle.js"></script>
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| 32 | </head>
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| 33 | <body>
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| 34 | result = <span id="res"></span>
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| 35 | </body>
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| 36 | </html>
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| 37 | ```
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| 38 |
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| 39 | and when you load the page you should see:
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| 40 |
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| 41 | ```
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| 42 | result = 105
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| 43 | ```
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| 44 |
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| 45 | # methods
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| 46 |
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| 47 | ## vm.runInNewContext(code, context={})
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| 48 |
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| 49 | Evaluate some `code` in a new iframe with a `context`.
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| 50 |
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| 51 | Contexts are like wrapping your code in a `with()` except slightly less terrible
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| 52 | because the code is sandboxed into a new iframe.
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| 53 |
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| 54 | # install
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| 55 |
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| 56 | This module is depended upon by browserify, so you should just be able to
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| 57 | `require('vm')` and it will just work. However if you want to use this module
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| 58 | directly you can install it with [npm](http://npmjs.org):
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| 59 |
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| 60 | ```
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| 61 | npm install vm-browserify
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| 62 | ```
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| 63 |
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| 64 | # license
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| 65 |
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| 66 | MIT
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