std@0.139.0/_util/deep_assign.ts

Deno standard library
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deep_assign.ts
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
import { assert } from "./assert.ts";
export function deepAssign<T, U>(target: T, source: U): T & U;export function deepAssign<T, U, V>( target: T, source1: U, source2: V,): T & U & V;export function deepAssign<T, U, V, W>( target: T, source1: U, source2: V, source3: W,): T & U & V & W;export function deepAssign( // deno-lint-ignore no-explicit-any target: Record<string, any>, // deno-lint-ignore no-explicit-any ...sources: any[]): // deno-lint-ignore ban-typesobject | undefined { for (let i = 0; i < sources.length; i++) { const source = sources[i]; if (!source || typeof source !== `object`) { return; } Object.entries(source).forEach(([key, value]): void => { if (value instanceof Date) { target[key] = new Date(value); return; } if (value instanceof RegExp) { target[key] = new RegExp(value); return; } if (!value || typeof value !== `object`) { target[key] = value; return; } if (Array.isArray(value)) { target[key] = []; } // value is an Object if (typeof target[key] !== `object` || !target[key]) { target[key] = {}; } assert(value); deepAssign(target[key] as Record<string, unknown>, value); }); } return target;}