Estraverse example

ast.js

var fs = require('fs');
var esprima = require('esprima');
var escodegen = require('escodegen');
var estraverse = require('estraverse');
fs.readFile('test_1.js', 'utf8', function(err, contents) {
	var ast = esprima.parse(contents);
	estraverse.replace(ast, {
		enter : function (node, parent) {
			if (node.type === 'Property' && node.key.name.indexOf('jota') != -1) {
				this.remove();
			}
		}
	});
	var code = escodegen.generate(ast);
	fs.writeFile('js1.js', code, function (err) {
		if (err) return console.log(err);
	});
});

test_1.js

var jota = function() {
	return {
		jota1 : function(){},
		jota2 : function(){},
		jota3 : function(){},
		jota4 : function(){},
		jota5 : function(){},
		jota6 : function(){}
	}
};