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util-extend
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The util-extend npm package is a utility library that provides functionality to extend objects. It is commonly used to merge properties from one or more source objects into a target object, effectively combining their properties.
Basic Object Extension
This feature allows you to extend a target object with properties from a source object. In this example, the target object { a: 1 } is extended with the source object { b: 2 }, resulting in { a: 1, b: 2 }.
const extend = require('util-extend');
const target = { a: 1 };
const source = { b: 2 };
const result = extend(target, source);
console.log(result); // { a: 1, b: 2 }
Multiple Source Objects
This feature allows you to extend a target object with properties from multiple source objects. In this example, the target object { a: 1 } is extended with source objects { b: 2 } and { c: 3 }, resulting in { a: 1, b: 2, c: 3 }.
const extend = require('util-extend');
const target = { a: 1 };
const source1 = { b: 2 };
const source2 = { c: 3 };
const result = extend(target, source1, source2);
console.log(result); // { a: 1, b: 2, c: 3 }
Overwriting Properties
This feature allows you to overwrite properties in the target object with properties from the source object. In this example, the target object { a: 1, b: 2 } is extended with the source object { b: 3, c: 4 }, resulting in { a: 1, b: 3, c: 4 }.
const extend = require('util-extend');
const target = { a: 1, b: 2 };
const source = { b: 3, c: 4 };
const result = extend(target, source);
console.log(result); // { a: 1, b: 3, c: 4 }
Lodash is a modern JavaScript utility library delivering modularity, performance, and extras. It provides a wide range of utility functions, including object extension through its `_.assign` and `_.merge` methods. Compared to util-extend, Lodash offers a more comprehensive set of utilities for various programming tasks.
The extend package is a simple utility for deep cloning and extending objects. It is similar to util-extend in that it allows for merging properties from source objects into a target object. However, extend also supports deep merging, which means it can recursively merge nested objects.
Deepmerge is a library for deep merging of JavaScript objects. It is particularly useful for merging complex nested objects, which is something util-extend does not handle. Deepmerge is a good choice when you need to merge objects with nested structures.
The Node object extending function that Node uses for Node!
var extend = require('util-extend');
function functionThatTakesOptions(options) {
var options = extend(defaults, options);
// now any unset options are set to the defaults.
}
FAQs
Node's internal object extension function
We found that util-extend demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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