React-native: instanceof error

sample code error.js

class TypeError extends Error {};
const obj = new TypeError();
console.log('TypeError', obj instanceof TypeError);
console.log('Error', obj instanceof Error);

run node error.js
TypeError true
Error true

run babel-node error.js
TypeError true
Error true

but, run on react native.

2016-08-08 19:51:34.677 [info][tid:com.facebook.react.JavaScript] 'TypeError', false
2016-08-08 19:51:34.677 [info][tid:com.facebook.react.JavaScript] 'Error', true

I'd know why that TypeError is false,

node v6.3.1
react native v0.30