1.2 KiB
Caveats
Async/Generators
The regenerator runtime and an ES6 polyfill are required in order for generators to work.
Classes
Built-in classes such as Date, Array and DOM cannot be subclassed due to
limitations in ES5 implementations.
If you're inheriting from a class then static properties are inherited from it via __proto__, this is widely supported but you may run into problems with much older browsers.
NOTE: __proto__ is not supported on IE <= 9 so static properties
will not be inherited. A possible workaround is to use super();:
class Foo {
static foo() {
}
}
class Bar extends Foo {
static foo() {
super();
}
}
For-of
A polyfill is required for for-of functionality that implements Symbol and
adds prototype[Symbol.iterator] behaviour to built-ins. Using the polyfills
specified in polyfill suffices.
Array destructuring / Spread
An ES6 polyfill is required for spread and array destructuring.
More specifically a polyfill for Array.from.