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lodash.merge
Advanced tools
The lodash.merge npm package is a method provided by lodash, a popular JavaScript utility library. It is used to recursively merge own and inherited enumerable string keyed properties of source objects into the destination object. It's commonly used to combine configurations, defaults, or to merge JSON objects with a deep copy.
Deep merging of objects
This feature allows for the deep merging of nested objects, combining properties from both source and destination objects.
{"const object = { 'a': [{ 'b': 2 }, { 'd': 4 }] };
const other = { 'a': [{ 'c': 3 }, { 'e': 5 }] };
_.merge(object, other);
// => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }"}
Merging with customizer function
This feature allows users to specify a customizer function that determines how merging is handled. It's useful for custom merge behavior on specific properties.
{"function customizer(objValue, srcValue) {
if (_.isArray(objValue)) {
return objValue.concat(srcValue);
}
}
const object = { 'a': [1], 'b': [2] };
const other = { 'a': [3], 'b': [4] };
_.mergeWith(object, other, customizer);
// => { 'a': [1, 3], 'b': [2, 4] }"}
Deepmerge is an npm package that provides deep merging of objects and arrays. It is similar to lodash.merge but is more focused on deep merging without the rest of lodash's utility functions.
Extend is a port of the classic jQuery.extend method that allows for deep or shallow copying of properties from one object to another. It is less powerful than lodash.merge for deep merging but is a lightweight alternative.
object-assign-deep npm package is similar to Object.assign but with deep merging capabilities. It is a smaller utility compared to lodash.merge and is focused solely on object merging.
The Lodash method _.merge
exported as a Node.js module.
Using npm:
$ {sudo -H} npm i -g npm
$ npm i --save lodash.merge
In Node.js:
var merge = require('lodash.merge');
See the documentation or package source for more details.
FAQs
The Lodash method `_.merge` exported as a module.
The npm package lodash.merge receives a total of 27,258,518 weekly downloads. As such, lodash.merge popularity was classified as popular.
We found that lodash.merge demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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