es-toolkit/dist/compat/_internal/isIndex.js

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

'use strict';

Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });

const IS_UNSIGNED_INTEGER = /^(?:0|[1-9]\d*)$/;
function isIndex(value, length = Number.MAX_SAFE_INTEGER) {
    switch (typeof value) {
        case 'number': {
            return Number.isInteger(value) && value >= 0 && value < length;
        }
        case 'symbol': {
            return false;
        }
        case 'string': {
            return IS_UNSIGNED_INTEGER.test(value);
        }
    }
}

exports.isIndex = isIndex;