preact
Version:
Fast 3kb React-compatible Virtual DOM library.
24 lines (22 loc) • 647 B
JavaScript
/**
* Assign properties from `props` to `obj`
* @template O, P The obj and props types
* @param {O} obj The object to copy properties to
* @param {P} props The object to copy properties from
* @returns {O & P}
*/
export function assign(obj, props) {
for (let i in props) obj[i] = props[i];
return /** @type {O & P} */ (obj);
}
/**
* Check if two objects have a different shape
* @param {object} a
* @param {object} b
* @returns {boolean}
*/
export function shallowDiffers(a, b) {
for (let i in a) if (i !== '__source' && !(i in b)) return true;
for (let i in b) if (i !== '__source' && a[i] !== b[i]) return true;
return false;
}