Yay!
Oh wait...
really? You have to use an expression syntax to define a class data
member? instead of the existing obhect field definition?
class xyz {
x = 0;
y = 0;
add() { }
/* Oh I see; there's no punctuation between class methods */
sub() { }
}
rather than
class xyz {
x:0,
y: 0
add() {} /* , optional? */
sub() {}
}
I'm sure there's method to what I now consider madness... out
On Wed, Feb 20, 2019 at 5:14 PM Adam Klein <ad...@chromium.org> wrote:
> LGTM!!
>
> On Wed, Feb 20, 2019 at 12:20 PM 'Mathias Bynens' via blink-dev <
> blink-...@chromium.org> wrote:
>
>> LGTM
>>
>> On Wed, Feb 20, 2019 at 8:58 PM Sathya Gunasekaran <gsat...@chromium.org>
>> wrote:
>>
>>> Contact Emails
>>>
>>> gsat...@chromium.org
>>>
>>>
>>> Spec
>>>
>>> https://github.com/tc39/proposal-class-fields
>>>
>>>
>>> Summary (taken from our WebFu article
>>> <https://developers.google.com/web/updates/2018/12/class-fields>)
>>>
>>>
>>>
>>> This private fields proposal provides encapsulation: If you're using an
>>> instance of a class, you cannot reference that class's private fields from
>>> outside the class body. You can only reference private fields from within
>>> the class that defines them.
>>>
>>>
>>> The new private fields syntax is similar to public fields, except you
>>> mark the field as being private by using #
>>> <https://github.com/tc39/proposal-class-fields/blob/master/PRIVATE_SYNTAX_FAQ.md>.
>>> You can think of the # as being part of the field name:
>>>
>>>
>>> class IncreasingCounter {
>>>
>>> #count = 0;
>>>
>>> get value() {
>>>
>>> console.log('Getting the current value!');
>>>
>>> return this.#count;
>>>
>>> }
>>>
>>> increment() {
>>>
>>> this.#count++;
>>>
>>> }
>>>
>>> }
>>>
>>>
>>> Private fields are not accessible outside of the class body:
>>>
>>>
>>> const counter = new IncreasingCounter();
>>>
>>> counter.#count;
>>>
>>> // → SyntaxError
>>>
>>> counter.#count = 42;
>>>
>>> // → SyntaxError
>>>
>>>
>>> This intent to ship includes private static fields as well:
>>>
>>>
>>> class ClassCounter {
>>>
>>> static #count = 0;
>>>
>>> static increment() {
>>>
>>> this.#count++;
>>>
>>> }
>>>
>>> }
>>>
>>> ClassCounter.#count;
>>>
>>> // → SyntaxError
>>>
>>> ClassCounter.increment();
>>>
>>>
>>>
>>> Interoperability and compatibility risk
>>>
>>> This stage 3 proposal introduces new syntax that was previously a
>>> SyntaxError. There’s very low web compat risk.
>>>
>>>
>>> Firefox: In development
>>> <https://bugzilla.mozilla.org/show_bug.cgi?id=1499448>
>>>
>>> Safari: In development <https://bugs.webkit.org/show_bug.cgi?id=174212>
>>>
>>> Edge: No signals
>>>
>>>
>>> Is this feature fully tested?
>>>
>>>
>>>
>>> Yes, this feature passes V8’s own mjsunit/cctest tests as well as all
>>> the Test262 tests.
>>>
>>>
>>> Tracking bug
>>>
>>> v8:5368 <http://bugs.chromium.org/p/v8/issues/detail?id=5368>
>>>
>>>
>>>
>>> Link to entry on the Chrome Platform Status dashboard
>>>
>>> https://www.chromestatus.com/feature/6035156464828416
>>>
>>>
>>>
>>> Requesting approval to ship?
>>>
>>> Yes. Note that since this is a V8/JS feature, this post is just an FYI
>>> to blink-dev — no sign off from Blink API owners is required.
>>>
>>>
>>>
>>> --
>>> --
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>>> v8-...@googlegroups.com
>>> http://groups.google.com/group/v8-dev
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>>>
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