escope

Escope (escope) is
ECMAScript
scope analyzer extracted from esmangle project.


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``js
var escope = require('escope');
var esprima = require('esprima');
var estraverse = require('estraverse');

var ast = esprima.parse(code);
var scopeManager = escope.analyze(ast);

var currentScope = scopeManager.acquire(ast); // global scope

estraverse.traverse(ast, {
enter: function(node, parent) {
// do stuff

if (/Function/.test(node.type)) {
currentScope = scopeManager.acquire(node); // get current function scope
}
},
leave: function(node, parent) {
if (/Function/.test(node.type)) {
currentScope = currentScope.upper; // set to parent scope
}

// do stuff
}
});
``

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Generated JSDoc is here.

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Demonstration is here by Sasha Mazurov (twitter: @mazurov). issue

!Demo

And there are tools constructed on Escope.

- Esmangle is a minifier / mangler / optimizer.
- Eslevels is a scope levels analyzer and SublimeText plugin for scope context coloring is constructed on it.
- Esgoggles is JavaScript code browser.

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Copyright (C) 2012-2013 Yusuke Suzuki
(twitter: @Constellation) and other contributors.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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