jsonpatch-js


Library to apply JSON Patches in JavaScript

- JSON Patch - http://tools.ietf.org/html/rfc6902
- JSON Pointer - http://tools.ietf.org/html/rfc6901

jsonpatch-js works as in the browser as a script, as a Node module and as an
AMD module.

Install

Bower

``
bower install json-patch
`

NPM

`
npm install json-patch
`

Note: at this time, all operations are applied in-place.

Methods

jsonpatch.apply(document, patch)

Applies a patch to the document

jsonpatch.compile(patch)

Compiles a patch and returns a function that takes a document to apply the patch to.

Patch Operations

$3

Patch syntax: {op: 'add', path: , value: }

`javascript
// Add property, result: {foo: 'bar'}
jsonpatch.apply({}, [{op: 'add', path: '/foo', value: 'bar'}]);

// Add array element, result: {foo: [1, 2, 3]}
jsonpatch.apply({foo: [1, 3]}, [{op: 'add', path: '/foo/1', value: 2}]);

// Complex, result: {foo: [{bar: 'baz'}]}
jsonpatch.apply({foo: [{}]}, [{op: 'add', path: '/foo/0/bar', value: 'baz'}]);
`

$3

Patch syntax: {op: 'remove', path: }

`javascript
// Remove property, result: {}
jsonpatch.apply({foo: 'bar'}, [{op: 'remove', path: '/foo'}]);

// Remove array element, result: {foo: [1, 3]}
jsonpatch.apply({foo: [1, 2, 3]}, [{op: 'remove', path: '/foo/1'}]);

// Complex, result: {foo: [{}]}
jsonpatch.apply({foo: [{bar: 'baz'}]}, [{op: 'remove', path: '/foo/0/bar'}]);
`

$3

Patch syntax: {op: 'replace', path: , value: }

`javascript
// Replace property, result: {foo: 1}
jsonpatch.apply({foo: 'bar'}, [{op: 'replace', path: '/foo', value: 1}]);

// Replace array element, result: {foo: [1, 4, 3]}
jsonpatch.apply({foo: [1, 2, 3]}, [{op: 'replace', path: '/foo/1', value: 4}]);

// Complex, result: {foo: [{bar: 1}]}
jsonpatch.apply({foo: [{bar: 'baz'}]}, [{op: 'replace', path: '/foo/0/bar', value: 1}]);
`

$3

Patch syntax: {op: 'move', from: , path: }

`javascript
// Move property, result {bar: [1, 2, 3]}
jsonpatch.apply({foo: [1, 2, 3]}, [{op: 'move', from: '/foo', path: '/bar'}]);
`

$3

Patch syntax: {op: 'copy', from: , path: }

`javascript
// Copy property, result {foo: [1, 2, 3], bar: 2}
jsonpatch.apply({foo: [1, 2, 3]}, [{op: 'copy', from: '/foo/1', path: '/bar'}]);
`

$3

Patch syntax: {op: 'test', path: , value: }

`javascript
// Test equality of property to value, result: true
jsonpatch.apply({foo: 'bar'}, [{op: 'test', path: '/foo', value: 'bar'}]
`

Changed in 0.5.0

The return value is no longer a boolean, but now the the document itself which adheres correctly to the specification. It the test fails, a PatchTestFailed error will be thrown.

Error Types

JSONPatchError

Base error type which all patch errors extend from.

InvalidPointerError

Thrown when the pointer is invalid.

InvalidPatchError

Thrown when the patch itself has an invalid syntax.

PatchConflictError

Thrown when there is a conflic with applying the patch to the document.

PatchTestFailed`

Thrown when a test operation is applied and fails.