Nelze vybrat více než 25 témat Téma musí začínat písmenem nebo číslem, může obsahovat pomlčky („-“) a může být dlouhé až 35 znaků.
 
 
 
 

1 řádek
1.7 KiB

  1. {"ast":null,"code":"var META = require('./_uid')('meta');\n\nvar isObject = require('./_is-object');\n\nvar has = require('./_has');\n\nvar setDesc = require('./_object-dp').f;\n\nvar id = 0;\n\nvar isExtensible = Object.isExtensible || function () {\n return true;\n};\n\nvar FREEZE = !require('./_fails')(function () {\n return isExtensible(Object.preventExtensions({}));\n});\n\nvar setMeta = function setMeta(it) {\n setDesc(it, META, {\n value: {\n i: 'O' + ++id,\n // object ID\n w: {} // weak collections IDs\n\n }\n });\n};\n\nvar fastKey = function fastKey(it, create) {\n // return primitive with prefix\n if (!isObject(it)) return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;\n\n if (!has(it, META)) {\n // can't set metadata to uncaught frozen object\n if (!isExtensible(it)) return 'F'; // not necessary to add metadata\n\n if (!create) return 'E'; // add missing metadata\n\n setMeta(it); // return object ID\n }\n\n return it[META].i;\n};\n\nvar getWeak = function getWeak(it, create) {\n if (!has(it, META)) {\n // can't set metadata to uncaught frozen object\n if (!isExtensible(it)) return true; // not necessary to add metadata\n\n if (!create) return false; // add missing metadata\n\n setMeta(it); // return hash weak collections IDs\n }\n\n return it[META].w;\n}; // add metadata on freeze-family methods calling\n\n\nvar onFreeze = function onFreeze(it) {\n if (FREEZE && meta.NEED && isExtensible(it) && !has(it, META)) setMeta(it);\n return it;\n};\n\nvar meta = module.exports = {\n KEY: META,\n NEED: false,\n fastKey: fastKey,\n getWeak: getWeak,\n onFreeze: onFreeze\n};","map":null,"metadata":{},"sourceType":"script"}