deep-assign-lite
v1.0.0
Published
Recursive object assign tool that focuses on quick-and-dirty way to handle options object in constructor or init process
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deepAssign lite
Recursive object assign tool that focuses on quick-and-dirty way to handle options object in constructor or init process.
This is basically a remake of jQuery.extend()
. So this inherits the same characterisics from it.
- The function only deep-copies if property's value is a plain object or an array.
- The function does not merge objects/arrays set to the same property in the
from
andto
objects, but overwritesto
's value with the deep-copy offrom
's value.
Install
npm install --save-dev deep-assign-lite
Usage
// import as node module
const deepAssign = require('deep-assign-lite');
// or import as ES6 module
import deepAssign from '.../node_modules/deep-assign-lite/deepAssign.js';
const from = {
foo: { x: 12, y: 34, z: ['i', 'j', 'k'] },
bar: [ 'a', 'b', {c: 1, d: false} ],
bam: () => {},
};
const to = {
foo: {a: 0, b: 1},
bar: [123, 456],
baz: 'xyz',
};
const result = deepAssign(to, from);
// `result`` will be `to` itself with the properties copied from `from`:
{
foo: { x: 12, y: 34, z: ['i', 'j', 'k'] }, //=> deep copy of from.foo
bar: [ 'a', 'b', {c: 1, d: false} ], //=> deep copy of from.bar
baz: 'xyz',
bam: () => {}, //=> shallow copy of from.bar
}
// Just like Object.assign and jQuery.extend, you can pass multiple `from` objects
const target = {};
const src1 = { foo: 123 },
const src2 = { bar: 456, baz: 789 };
const src3 = { bar: ['a', 'b'], bam: {x: 0, y: 0} };
deepAssign(target, src1, src2, src3);
// `target`` will be:
{
foo: 123,
bar: ['a', 'b'],
baz: 789,
bam: {x: 0, y: 0},
}