Removing language features will introduce breaking changes. Removal is
more like an agreement, not to use certain features, so it is the task
of a Linter, which can check, that you do not use "bad things". Strict
mode is another way, which disables a certain set of features, such that
it becomes an error, when you use them. However, it is not very fine
granular.
Maybe ES should introduce something like a configuration object, in
which developers can enable / disable or in general configure features
for their module in a fine granular way. Of course all features which
exist at the time of introducing such a mechanism would have to be
enabled by default...
On 20.07.2017 01:16, Andrea Giammarchi wrote:
FWIW I can tell you already removing `RegExp.$1`, `RegExp.global`, and
friends will break a lot of things.
Testing a `RegExp` to instantly using its matches via `$1` and friends
has been used in many scripts.
Regards
On Thu, Jul 20, 2017 at 1:11 AM, Isiah Meadows <[email protected]
<mailto:[email protected]>> wrote:
It's mostly a TC39 process, where they have to go through a very
pain-staking process to ensure it breaks virtually nothing in real
world code, one that takes several years. So far, the only
language feature successfully removed is `arguments.caller`. There
are a few others deprecated for future removal:
- `Function.prototype.caller`
- `arguments.callee`
- `RegExp.$1`, `RegExp.global`, and friends
- Most everything banned from strict mode.
- And likely others.
On Wed, Jul 19, 2017, 18:36 David White
<[email protected] <mailto:[email protected]>>
wrote:
Hi,
I’m just curious as there are a lot of proposals for the
addition of features to the ES specification, is there any
scope for requests to remove language features? Going via the
same means of writing a proposition that would attempt to
support the removal of a feature, ultimately simplifying the
specification and language?
David
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