es-toolkit/dist/compat/predicate/isEqualWith.js

A state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations.

const require_after = require("../../function/after.js");
const require_isEqualWith = require("../../predicate/isEqualWith.js");
//#region src/compat/predicate/isEqualWith.ts
/**
* Compares two values for equality using a custom comparison function.
*
* The custom function allows for fine-tuned control over the comparison process. If it returns a boolean, that result determines the equality. If it returns undefined, the function falls back to the default equality comparison.
*
* This function also uses the custom equality function to compare values inside objects,
* arrays, maps, sets, and other complex structures, ensuring a deep comparison.
*
* This approach provides flexibility in handling complex comparisons while maintaining efficient default behavior for simpler cases.
*
* The custom comparison function can take up to six parameters:
* - `x`: The value from the first object `a`.
* - `y`: The value from the second object `b`.
* - `property`: The property key used to get `x` and `y`.
* - `xParent`: The parent of the first value `x`.
* - `yParent`: The parent of the second value `y`.
* - `stack`: An internal stack (Map) to handle circular references.
*
* @param a - The first value to compare.
* @param b - The second value to compare.
* @param [areValuesEqual=noop] - A function to customize the comparison.
*   If it returns a boolean, that result will be used. If it returns undefined,
*   the default equality comparison will be used.
* @returns `true` if the values are equal according to the customizer, otherwise `false`.
*
* @example
* const customizer = (a, b) => {
*   if (typeof a === 'string' && typeof b === 'string') {
*     return a.toLowerCase() === b.toLowerCase();
*   }
* };
* isEqualWith('Hello', 'hello', customizer); // true
* isEqualWith({ a: 'Hello' }, { a: 'hello' }, customizer); // true
* isEqualWith([1, 2, 3], [1, 2, 3], customizer); // true
*/
function isEqualWith(a, b, areValuesEqual) {
	if (typeof areValuesEqual !== "function") areValuesEqual = () => void 0;
	return require_isEqualWith.isEqualWith(a, b, (...args) => {
		const result = areValuesEqual(...args);
		if (result !== void 0) return Boolean(result);
		if (a instanceof Map && b instanceof Map) return isEqualWith(Array.from(a), Array.from(b), require_after.after(2, areValuesEqual));
		if (a instanceof Set && b instanceof Set) return isEqualWith(Array.from(a), Array.from(b), require_after.after(2, areValuesEqual));
	});
}
//#endregion
exports.isEqualWith = isEqualWith;