[tobil4sk]

new String() on javascript creates a boxed string, which makes it fail on strict equality. This caused inconsistent edge cases with switch statements, as reported in: #9623. Haxe sometimes generates if statements for simple switches, which worked fine, but when it generated a real native switch statement it wouldn't work correctly.

We can turn new String() into String() (using @:selfCall), which creates a normal string primitive instead of an object: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/String#return_value

The mozilla docs also say:

Warning: You should rarely find yourself using String as a constructor.

Type.createInstance is handled as well, but Type.createEmptyInstance creates a completely broken value currently: #13164