has (Lodash Compatibility)

Use Object.hasOwn or in operator instead

This has function is slow due to complex path parsing and array index handling.

Instead, use the faster and more modern Object.hasOwn() or the in operator.

Checks if a property at the specified path exists in an object.

const exists = has(object, path);

Reference

has(object, path)

Use has to check if an object has a property at a specific path. It only checks own properties and does not check inherited properties.

import { has } from 'es-toolkit/compat';

// Simple property check
const object = { a: 1, b: 2 };
has(object, 'a');
// => true

// Nested object check
const nested = { a: { b: { c: 3 } } };
has(nested, 'a.b.c');
// => true
has(nested, ['a', 'b', 'c']);
// => true

// Non-existent property
has(nested, 'a.b.d');
// => false

// Array index check
const array = [1, 2, 3];
has(array, 2);
// => true
has(array, 5);
// => false

It works correctly with sparse arrays too.

import { has } from 'es-toolkit/compat';

const sparse = [1, , 3]; // index 1 is empty
has(sparse, 0); // true
has(sparse, 1); // true - actually exists, but value is undefined
has(sparse, 2); // true

Parameters

• object (any): The object to query.
• path (PropertyPath): The path of the property to check. Can be represented as a string, number, symbol, or array.

Returns

(boolean): Returns true if the property exists at the path, otherwise false.