just-diff-apply

just-diff-apply

Part of a library of zero-dependency npm modules that do just do one thing.
Guilt-free utilities for every occasion.

🍦 Try it

``shell
npm install just-diff-apply
`
`shell
yarn add just-diff-apply
`

Apply a diff object to an object. Pass converter to apply a http://jsonpatch.com standard patch

`js
import {diffApply} from 'just-diff-apply';

const obj1 = {a: 3, b: 5};
diffApply(obj1,
[
{ "op": "remove", "path": ['b'] },
{ "op": "replace", "path": ['a'], "value": 4 },
{ "op": "add", "path": ['c'], "value": 5 }
]
);
obj1; // {a: 4, c: 5}

const obj2 = {a: 3, b: 5};
diffApply(obj2,
[
{ "op": "move", "from": ['a'], "path": ['c']},
]
);
obj2; // {b: 5, c: 3}

// using converter to apply jsPatch standard paths
// see http://jsonpatch.com
import {diffApply, jsonPatchPathConverter} from 'just-diff-apply'
const obj3 = {a: 3, b: 5};
diffApply(obj3, [
{ "op": "remove", "path": '/b' },
{ "op": "replace", "path": '/a', "value": 4 }
{ "op": "add", "path": '/c', "value": 5 }
], jsonPatchPathConverter);
obj3; // {a: 4, c: 5}

// arrays (array key can be string or numeric)
const obj4 = {a: 4, b: [1, 2, 3]};
diffApply(obj4, [
{ "op": "replace", "path": ['a'], "value": 3 }
{ "op": "replace", "path": ['b', 2], "value": 4 }
{ "op": "add", "path": ['b', 3], "value": 9 }
]);
obj4; // {a: 3, b: [1, 2, 4, 9]}

// nested paths
const obj5 = {a: 4, b: {c: 3}};
diffApply(obj5, [
{ "op": "replace", "path": ['a'], "value": 5 }
{ "op": "remove", "path": ['b', 'c']}
{ "op": "add", "path": ['b', 'd'], "value": 4 }
]);
obj5; // {a: 5, b: {d: 4}}
``