svelte-simple-form/dist/helper.js

A lightweight, **type-safe**, and **reactive** form state management hook for **Svelte 5**, featuring:

/* eslint-disable @typescript-eslint/no-explicit-any */
export function checkPath(obj, path) {
    const keys = path.split('.');
    let current = obj;
    for (const key of keys) {
        if (current == null)
            return false;
        // Convert numeric keys for arrays
        const prop = Array.isArray(current) && !isNaN(Number(key)) ? Number(key) : key;
        if (!(prop in current))
            return false;
        current = current[prop];
    }
    return true;
}
export function getByPath(obj, path) {
    return path.split('.').reduce((o, key) => (o ? o[key] : undefined), obj);
}
export function setByPath(obj, path, value) {
    const keys = path.split('.');
    const lastKey = keys.pop();
    const lastObj = keys.reduce((o, key) => (o[key] ??= {}), obj);
    if (value === undefined) {
        delete lastObj[lastKey];
    }
    else {
        lastObj[lastKey] = value;
    }
}
export function getChangedPaths(obj1, obj2, basePath = '') {
    const changed = new Set();
    function collect(path) {
        const parts = path.split('.');
        while (parts.length > 0) {
            changed.add(parts.join('.'));
            parts.pop();
        }
    }
    function traverse(o1, o2, path) {
        if (typeof o1 !== 'object' || typeof o2 !== 'object' || o1 === null || o2 === null) {
            if (o1 !== o2)
                collect(path);
            return;
        }
        if (Array.isArray(o1) && Array.isArray(o2)) {
            const length = Math.max(o1.length, o2.length);
            for (let i = 0; i < length; i++) {
                traverse(o1[i], o2[i], path ? `${path}.${i}` : `${i}`);
            }
            return;
        }
        const keys = new Set([...Object.keys(o1 || {}), ...Object.keys(o2 || {})]);
        for (const key of keys) {
            traverse(o1?.[key], o2?.[key], path ? `${path}.${key}` : key);
        }
    }
    traverse(obj1, obj2, basePath);
    return [...changed];
}