From 363723fc84f7b8477592e0105aeb331ec9a017af Mon Sep 17 00:00:00 2001 From: Florian Dold Date: Mon, 14 Aug 2017 05:01:11 +0200 Subject: node_modules --- node_modules/es6-symbol/is-implemented.js | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 node_modules/es6-symbol/is-implemented.js (limited to 'node_modules/es6-symbol/is-implemented.js') diff --git a/node_modules/es6-symbol/is-implemented.js b/node_modules/es6-symbol/is-implemented.js new file mode 100644 index 000000000..93629d2f8 --- /dev/null +++ b/node_modules/es6-symbol/is-implemented.js @@ -0,0 +1,17 @@ +'use strict'; + +var validTypes = { object: true, symbol: true }; + +module.exports = function () { + var symbol; + if (typeof Symbol !== 'function') return false; + symbol = Symbol('test symbol'); + try { String(symbol); } catch (e) { return false; } + + // Return 'true' also for polyfills + if (!validTypes[typeof Symbol.iterator]) return false; + if (!validTypes[typeof Symbol.toPrimitive]) return false; + if (!validTypes[typeof Symbol.toStringTag]) return false; + + return true; +}; -- cgit v1.2.3