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offers foolproof deep cloning of objects, arrays, numbers, strings, maps, sets, promises, etc. in JavaScript.
XSS vulnerability detected
npm install clone
(It also works with browserify, ender or standalone. You may want to use the
option noParse
in browserify to reduce the resulting file size, since usually
Buffer
s are not needed in browsers.)
var clone = require('clone');
var a, b;
a = { foo: { bar: 'baz' } }; // initial value of a
b = clone(a); // clone a -> b
a.foo.bar = 'foo'; // change a
console.log(a); // show a
console.log(b); // show b
This will print:
{ foo: { bar: 'foo' } }
{ foo: { bar: 'baz' } }
clone masters cloning simple objects (even with custom prototype), arrays, Date objects, and RegExp objects. Everything is cloned recursively, so that you can clone dates in arrays in objects, for example.
clone(val, circular, depth)
val
-- the value that you want to clone, any type allowedcircular
-- boolean
Call clone
with circular
set to false
if you are certain that obj
contains no circular references. This will give better performance if
needed. There is no error if undefined
or null
is passed as obj
.
depth
-- depth to which the object is to be cloned (optional,
defaults to infinity)
prototype
-- sets the prototype to be used when cloning an object.
(optional, defaults to parent prototype).
includeNonEnumerable
-- set to true
if the non-enumerable properties
should be cloned as well. Non-enumerable properties on the prototype chain
will be ignored. (optional, defaults to false
)
clone.clonePrototype(obj)
obj
-- the object that you want to cloneDoes a prototype clone as described by Oran Looney.
var a, b;
a = { hello: 'world' };
a.myself = a;
b = clone(a);
console.log(b);
This will print:
{ hello: "world", myself: [Circular] }
So, b.myself
points to b
, not a
. Neat!
npm test
Buffer.allocUnsafe()
on Node >= 4.5.0 (contributed by @ChALkeR)test-apart-ctx.html
. This vulnerability was disclosed by Juho Nurminen of
2NS - Second Nature Security.Some special objects like a socket or process.stdout
/stderr
are known to not
be cloneable. If you find other objects that cannot be cloned, please open an
issue.
If you encounter any bugs or issues, feel free to open an issue at github or send me an email to paul@vorba.ch. I also always like to hear from you, if you’re using my code.
Copyright © 2011-2016 Paul Vorbach and contributors.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.