ts-prime/dist/es/setPath.js

A utility library for JavaScript and Typescript.

var __spreadArrays = (this && this.__spreadArrays) || function () {
    for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;
    for (var r = Array(s), k = 0, i = 0; i < il; i++)
        for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)
            r[k] = a[j];
    return r;
};
import { clone } from './clone';
import { isArray, isObject } from './guards';
import { type } from './type';
/**
 * Dynamically sets object path
 * @param target - Target object
 * @param path - Path in object
 * @param value - On final object element
 * @signature
 *    P.setPath(obj, path, value)
 * @example
 *    P.setPath({ data: {} }, "data.value.max", 100) // { data: { value: { max: 100 } } }
 * @category Object
 */
export function setPath(target, path, value) {
    if (!(isObject(target) || isArray(target))) {
        throw new Error("Expecting to receive object or array. But received " + type(target));
    }
    var clonedTarget = clone(target);
    var result = clonedTarget;
    var clonedPath = __spreadArrays(path);
    while (clonedPath.length !== 0) {
        var k = clonedPath.shift();
        if (k != null) {
            if (result[k] == null) {
                result[k] = clonedPath.length === 0 ? value : {};
                result = result[k];
                continue;
            }
            if (clonedPath.length === 0) {
                result[k] = value;
            }
            result = result[k];
        }
    }
    return clonedTarget;
}