Objects prototypes extending #5507
Description
I was trying to polyfill my App by importing a file:
(function() {
'use strict';
String.prototype.format = function () {
....
};
...
})()
And the error was caught
One of the sources for assign has an enumerable key on the prototype chain. This is an edge case that we do not support. This error is a performance optimization and not spec compliant.
It was totally ok in RN 0.15. It happens when I upgraded my project to RN 0.18