lodash/isNumber.js

import baseGetTag from './.internal/baseGetTag.js';
import isObjectLike from './isObjectLike.js';

/** `Object#toString` result references. */
const numberTag = '[object Number]';

/**
 * Checks if `value` is classified as a `Number` primitive or object.
 *
 * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
 * classified as numbers, use the `isFinite` method.
 *
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a number, else `false`.
 * @example
 *
 * isNumber(3);
 * // => true
 *
 * isNumber(Number.MIN_VALUE);
 * // => true
 *
 * isNumber(Infinity);
 * // => true
 *
 * isNumber('3');
 * // => false
 */
function isNumber(value) {
  return typeof value == 'number' ||
    (isObjectLike(value) && baseGetTag(value) == numberTag);
}

export default isNumber;