to-string-x
Version:
ES6-compliant shim for ToString.
327 lines (274 loc) • 10.1 kB
JavaScript
/*!
{
"author": "Graham Fairweather",
"copywrite": "Copyright (c) 2015-present",
"date": "2019-08-28T16:45:44.429Z",
"describe": "",
"description": "ES6-compliant shim for ToString.",
"file": "to-string-x.js",
"hash": "1178b479809302c20bc7",
"license": "MIT",
"version": "2.1.1"
}
*/
(function webpackUniversalModuleDefinition(root, factory) {
if(typeof exports === 'object' && typeof module === 'object')
module.exports = factory();
else if(typeof define === 'function' && define.amd)
define([], factory);
else if(typeof exports === 'object')
exports["toStringX"] = factory();
else
root["toStringX"] = factory();
})((function () {
'use strict';
var ObjectCtr = {}.constructor;
var objectPrototype = ObjectCtr.prototype;
var defineProperty = ObjectCtr.defineProperty;
var $globalThis;
var getGlobalFallback = function() {
if (typeof self !== 'undefined') {
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/* 0 */
/***/ (function(module, exports, __webpack_require__) {
"use strict";
var toStr = Object.prototype.toString;
var hasSymbols = __webpack_require__(2)();
if (hasSymbols) {
var symToStr = Symbol.prototype.toString;
var symStringRegex = /^Symbol\(.*\)$/;
var isSymbolObject = function isRealSymbolObject(value) {
if (typeof value.valueOf() !== 'symbol') {
return false;
}
return symStringRegex.test(symToStr.call(value));
};
module.exports = function isSymbol(value) {
if (typeof value === 'symbol') {
return true;
}
if (toStr.call(value) !== '[object Symbol]') {
return false;
}
try {
return isSymbolObject(value);
} catch (e) {
return false;
}
};
} else {
module.exports = function isSymbol(value) {
// this environment does not support Symbols.
return false && false;
};
}
/***/ }),
/* 1 */
/***/ (function(module, __webpack_exports__, __webpack_require__) {
"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony import */ var is_symbol__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(0);
/* harmony import */ var is_symbol__WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(is_symbol__WEBPACK_IMPORTED_MODULE_0__);
var ERROR_MESSAGE = 'Cannot convert a Symbol value to a string';
var castString = ERROR_MESSAGE.constructor;
/**
* The abstract operation ToString converts argument to a value of type String.
*
* @param {*} [value] - The value to convert to a string.
* @throws {TypeError} If `value` is a Symbol.
* @returns {string} The converted value.
*/
var ToString = function ToString(value) {
if (is_symbol__WEBPACK_IMPORTED_MODULE_0___default()(value)) {
throw new TypeError(ERROR_MESSAGE);
}
return castString(value);
};
/* harmony default export */ __webpack_exports__["default"] = (ToString);
/***/ }),
/* 2 */
/***/ (function(module, exports, __webpack_require__) {
"use strict";
/* WEBPACK VAR INJECTION */(function(global) {
var origSymbol = global.Symbol;
var hasSymbolSham = __webpack_require__(4);
module.exports = function hasNativeSymbols() {
if (typeof origSymbol !== 'function') { return false; }
if (typeof Symbol !== 'function') { return false; }
if (typeof origSymbol('foo') !== 'symbol') { return false; }
if (typeof Symbol('bar') !== 'symbol') { return false; }
return hasSymbolSham();
};
/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(3)))
/***/ }),
/* 3 */
/***/ (function(module, exports) {
var g;
// This works in non-strict mode
g = (function() {
return this;
})();
try {
// This works if eval is allowed (see CSP)
g = g || new Function("return this")();
} catch (e) {
// This works if the window reference is available
if (typeof window === "object") g = window;
}
// g can still be undefined, but nothing to do about it...
// We return undefined, instead of nothing here, so it's
// easier to handle this case. if(!global) { ...}
module.exports = g;
/***/ }),
/* 4 */
/***/ (function(module, exports, __webpack_require__) {
"use strict";
/* eslint complexity: [2, 17], max-statements: [2, 33] */
module.exports = function hasSymbols() {
if (typeof Symbol !== 'function' || typeof Object.getOwnPropertySymbols !== 'function') { return false; }
if (typeof Symbol.iterator === 'symbol') { return true; }
var obj = {};
var sym = Symbol('test');
var symObj = Object(sym);
if (typeof sym === 'string') { return false; }
if (Object.prototype.toString.call(sym) !== '[object Symbol]') { return false; }
if (Object.prototype.toString.call(symObj) !== '[object Symbol]') { return false; }
// temp disabled per https://github.com/ljharb/object.assign/issues/17
// if (sym instanceof Symbol) { return false; }
// temp disabled per https://github.com/WebReflection/get-own-property-symbols/issues/4
// if (!(symObj instanceof Symbol)) { return false; }
// if (typeof Symbol.prototype.toString !== 'function') { return false; }
// if (String(sym) !== Symbol.prototype.toString.call(sym)) { return false; }
var symVal = 42;
obj[sym] = symVal;
for (sym in obj) { return false; } // eslint-disable-line no-restricted-syntax
if (typeof Object.keys === 'function' && Object.keys(obj).length !== 0) { return false; }
if (typeof Object.getOwnPropertyNames === 'function' && Object.getOwnPropertyNames(obj).length !== 0) { return false; }
var syms = Object.getOwnPropertySymbols(obj);
if (syms.length !== 1 || syms[0] !== sym) { return false; }
if (!Object.prototype.propertyIsEnumerable.call(obj, sym)) { return false; }
if (typeof Object.getOwnPropertyDescriptor === 'function') {
var descriptor = Object.getOwnPropertyDescriptor(obj, sym);
if (descriptor.value !== symVal || descriptor.enumerable !== true) { return false; }
}
return true;
};
/***/ })
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});
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