standard-symbols.js•1.42 kB
"use strict";
var d = require("d")
, NativeSymbol = require("ext/global-this").Symbol;
module.exports = function (SymbolPolyfill) {
return Object.defineProperties(SymbolPolyfill, {
// To ensure proper interoperability with other native functions (e.g. Array.from)
// fallback to eventual native implementation of given symbol
hasInstance: d(
"", (NativeSymbol && NativeSymbol.hasInstance) || SymbolPolyfill("hasInstance")
),
isConcatSpreadable: d(
"",
(NativeSymbol && NativeSymbol.isConcatSpreadable) ||
SymbolPolyfill("isConcatSpreadable")
),
iterator: d("", (NativeSymbol && NativeSymbol.iterator) || SymbolPolyfill("iterator")),
match: d("", (NativeSymbol && NativeSymbol.match) || SymbolPolyfill("match")),
replace: d("", (NativeSymbol && NativeSymbol.replace) || SymbolPolyfill("replace")),
search: d("", (NativeSymbol && NativeSymbol.search) || SymbolPolyfill("search")),
species: d("", (NativeSymbol && NativeSymbol.species) || SymbolPolyfill("species")),
split: d("", (NativeSymbol && NativeSymbol.split) || SymbolPolyfill("split")),
toPrimitive: d(
"", (NativeSymbol && NativeSymbol.toPrimitive) || SymbolPolyfill("toPrimitive")
),
toStringTag: d(
"", (NativeSymbol && NativeSymbol.toStringTag) || SymbolPolyfill("toStringTag")
),
unscopables: d(
"", (NativeSymbol && NativeSymbol.unscopables) || SymbolPolyfill("unscopables")
)
});
};