On Sat, Oct 19, 2013 at 10:25 AM, teramako <teramako at gmail.com> wrote:
> Hi
>
> I believe Object.assign never update the target's [[prototype]]. But
> current rev19 spec is using Put. So I'm afraid of following case will
> update the [[prototype]].
>
> var soruce = {};
> Object.defineProperty(source, "__proto__", {
> value: { a: "A", b: "B" },
> enumerable: true
> });
> var target = {};
> Object.assign(target, source);
>
> Is this expected result ? and is there a plan to change to
> DefinePropertyOrThrow from Put ?
>
Object.assign is essentially a "batch property assignment with Put"; I
believe what you're describing above is Object.mixin, which is "batch
property definition with DefinePropertyOrThrow".
Rick
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domenic at domenicdenicola.com (2013-10-26T03:17:31.919Z)
Object.assign is essentially a "batch property assignment with Put"; I
believe what you're describing above is Object.mixin, which is "batch
property definition with DefinePropertyOrThrow".
On Sat, Oct 19, 2013 at 10:25 AM, teramako <teramako at gmail.com> wrote: > Hi > > I believe Object.assign never update the target's [[prototype]]. But > current rev19 spec is using Put. So I'm afraid of following case will > update the [[prototype]]. > > var soruce = {}; > Object.defineProperty(source, "__proto__", { > value: { a: "A", b: "B" }, > enumerable: true > }); > var target = {}; > Object.assign(target, source); > > Is this expected result ? and is there a plan to change to > DefinePropertyOrThrow from Put ? > Object.assign is essentially a "batch property assignment with Put"; I believe what you're describing above is Object.mixin, which is "batch property definition with DefinePropertyOrThrow". Rick -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.mozilla.org/pipermail/es-discuss/attachments/20131019/c3a5cdf1/attachment.html>