tc39-weakrefs-shim/lib/utils/lodash/isNative.js

Shim for TC39 Weakrefs proposal

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const isObject_js_1 = __importDefault(require("./isObject.js"));
/**
 * Used to match `RegExp`
 * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
 */
const reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
/** Used to detect if a method is native. */
const reIsNative = RegExp(`^${Function.prototype.toString.call(Object.prototype.hasOwnProperty)
    .replace(reRegExpChar, '\\$&')
    .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?')}$`);
/**
 * Checks if `value` is a pristine native function.
 *
 * @since 3.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a native function,
 *  else `false`.
 * @example
 *
 * isNative(Array.prototype.push)
 * // => true
 *
 * isNative(isDate)
 * // => false
 */
function isNative(value) {
    return isObject_js_1.default(value) && reIsNative.test(value);
}
exports.default = isNative;
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