ts-deepmerge

TypeScript Deep Merge

A deep merge function that automatically infers the return type based on your input, without mutating the source objects.

Usage

import merge from "ts-deepmerge";

const obj1 = {
  a: {
    a: 1
  }
};

const obj2 = {
  b: {
    a: 2,
    b: 2
  }
};

const obj3 = {
  a: {
    b: 3
  },
  b: {
    c: 3
  },
  c: 3
};

const result = merge(obj1, obj2, obj3);

The value of the above result is:

{
  "a": {
    "a": 1,
    "b": 3
  },
  "b": {
    "a": 2,
    "b": 2,
    "c": 3
  },
  "c": 3
}