ember-legacy-class-transform
Version:
The default blueprint for ember-cli addons.
12 lines • 1.66 kB
JavaScript
export var HAS_NATIVE_WEAKMAP = function () {
// detect if `WeakMap` is even present
var hasWeakMap = typeof WeakMap === 'function';
if (!hasWeakMap) {
return false;
}
var instance = new WeakMap();
// use `Object`'s `.toString` directly to prevent us from detecting
// polyfills as native weakmaps
return Object.prototype.toString.call(instance) === '[object WeakMap]';
}();
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