Escope (escope) is ECMAScript scope analyzer extracted from esmangle project.
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
}
});
Generated JSDoc is here.
Demonstration is here by Sasha Mazurov (twitter: @mazurov). issue
And there are tools constructed on Escope.
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