Sha256: 6c332fef190d693ebe7af0e9cfbd58bb4bbf2d6bf9877c1ddab4705f8a2f302c
Contents?: true
Size: 1.7 KB
Versions: 65
Compression:
Stored size: 1.7 KB
Contents
'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; };
Version data entries
65 entries across 65 versions & 7 rubygems