@codegouvfr/react-dsfr/tools/deepAssign.js

French State Design System React integration library

import { assert, is } from "tsafe/assert";
import { structuredCloneButFunctions } from "./structuredCloneButFunctions";
/** NOTE: Array a copied over, not merged. */
export function deepAssign(params) {
    const { target, source } = params;
    Object.keys(source).forEach(key => {
        const dereferencedSource = source[key];
        if (dereferencedSource === undefined) {
            delete target[key];
            return;
        }
        if (dereferencedSource instanceof Date) {
            assign({
                target,
                key,
                value: new Date(dereferencedSource.getTime())
            });
            return;
        }
        if (dereferencedSource instanceof Array) {
            assign({
                target,
                key,
                value: structuredCloneButFunctions(dereferencedSource)
            });
            return;
        }
        if (dereferencedSource instanceof Function || !(dereferencedSource instanceof Object)) {
            assign({
                target,
                key,
                value: dereferencedSource
            });
            return;
        }
        if (!(target[key] instanceof Object)) {
            target[key] = {};
        }
        const dereferencedTarget = target[key];
        assert(is(dereferencedTarget));
        assert(is(dereferencedSource));
        deepAssign({
            target: dereferencedTarget,
            source: dereferencedSource
        });
    });
}
function assign(params) {
    const { target, key, value } = params;
    Object.defineProperty(target, key, {
        enumerable: true,
        writable: true,
        configurable: true,
        value
    });
}
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