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PR-URL: https://github.com/nodejs/node/pull/35953 Reviewed-By: Ruy Adorno <ruyadorno@github.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
77 lines
1.7 KiB
Markdown
77 lines
1.7 KiB
Markdown
## just-diff
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Part of a [library](../../../../) of zero-dependency npm modules that do just do one thing.
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Guilt-free utilities for every occasion.
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[Try it now](http://anguscroll.com/just/just-diff)
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Return an object representing the difference between two other objects
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Pass converter to format as http://jsonpatch.com
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```js
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import {diff} from 'just-diff';
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const obj1 = {a: 4, b: 5};
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const obj2 = {a: 3, b: 5};
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const obj3 = {a: 4, c: 5};
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diff(obj1, obj2);
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[
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{ "op": "replace", "path": ['a'], "value": 3 }
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]
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diff(obj2, obj3);
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[
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{ "op": "remove", "path": ['b'] },
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{ "op": "replace", "path": ['a'], "value": 4 }
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{ "op": "add", "path": ['c'], "value": 5 }
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]
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// using converter to generate jsPatch standard paths
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import {diff, jsonPatchPathConverter} from 'just-diff'
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diff(obj1, obj2, jsonPatchPathConverter);
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[
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{ "op": "replace", "path": '/a', "value": 3 }
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]
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diff(obj2, obj3, jsonPatchPathConverter);
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[
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{ "op": "remove", "path": '/b' },
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{ "op": "replace", "path": '/a', "value": 4 }
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{ "op": "add", "path": '/c', "value": 5 }
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]
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// arrays
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const obj4 = {a: 4, b: [1, 2, 3]};
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const obj5 = {a: 3, b: [1, 2, 4]};
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const obj6 = {a: 3, b: [1, 2, 4, 5]};
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diff(obj4, obj5);
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[
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{ "op": "replace", "path": ['a'], "value": 3 }
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{ "op": "replace", "path": ['b', 2], "value": 4 }
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]
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diff(obj5, obj6);
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[
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{ "op": "add", "path": ['b', 3], "value": 5 }
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]
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// nested paths
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const obj7 = {a: 4, b: {c: 3}};
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const obj8 = {a: 4, b: {c: 4}};
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const obj9 = {a: 5, b: {d: 4}};
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diff(obj7, obj8);
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[
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{ "op": "replace", "path": ['b', 'c'], "value": 4 }
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]
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diff(obj8, obj9);
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[
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{ "op": "replace", "path": ['a'], "value": 5 }
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{ "op": "remove", "path": ['b', 'c']}
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{ "op": "add", "path": ['b', 'd'], "value": 4 }
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]
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```
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