Any example? Since stage 3 is roughly "request for implementers", and Stage 4 requires 2 real world implementations and essentially mean "will be part of the standard in the next wave".
The closest thing I can think of is ES6 modules, because the module loader spec wasn't finished, but the syntax still lived on.
Now, stuff getting kicked down from Stage 3, that has happened.
The closest thing I can think of is ES6 modules, because the module loader spec wasn't finished, but the syntax still lived on.
Now, stuff getting kicked down from Stage 3, that has happened.