The problem is that the class extends native ES6 class and is transpiled to ES5 with Babel. Transpiled classes cannot extend native classes, at least without additional measures.
class TranspiledFoo extends NativeBar {
constructor() {
super();
}
}
results in something like
function TranspiledFoo() {
var _this = NativeBar.call(this) || this;
return _this;
}
// prototypically inherit from NativeBar
Since ES6 classes should be only called with new
, NativeBar.call
results in error.
ES6 classes are supported in any recent Node version, they shouldn’t be transpiled. es2015
should be excluded from Babel configuration, it’s preferable to use env
preset set to node
target.
The same problem applies to TypeScript. The compiler should be properly configured to not transpile classes in order for them to inherit from native or Babel classes.