1.5 KiB
feature-exists
removal: Draft 1.0
(Issue)
This proposal removes feature-exists
in the built-in sass:meta
module.
Table of Contents
Background
This section is non-normative.
feature-exists
is ill-defined as nothing specifies what each feature actually
requires to be considered as supported. The shared sass-spec
testsuite does
not cover this either. Thus, no new feature identifier has been added in it
for years.
New Sass features essentially fall into one of three categories:
- New built-in functions or mixins, which are easy to detect using other
sass:meta
functions. - Language-level features which are relatively easy to detect on their own
(for example, first-class calc can be detected with
calc(1 + 1) == 2)
. - New syntax which can't even be parsed in implementations that don't support it, for which feature detection isn't particularly useful anyway.
Summary
This section is non-normative.
The feature-exists
function of sass:meta
and its global alias will be
removed without any direct replacement.
Deprecation Process
The feature-exists
function will be supported until the next major version
with a deprecation warning.
feature-exists
During the deprecation period, when invoking the feature-exists
function,
emit a deprecation warning named feature-exists
.