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description: 🚧 under construction
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# ⭐️ ES2020

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{% tab title="🔴 主題" %}
* [promise](../async/promise "mention") ⟩ [Promise.allSettled()](../async/promise/in-parallel)
* [str.matchall](../val/prim/str/method/str.matchall "mention") - an [iterator](../iteration/iterator "mention") of all matching results.
* [this](../scope/global/object/this "mention") - global object regardless of environmemnts.
* [nullish-coalescing](../grammar/op/logical/nullish-coalescing "mention")
* [optional-chaining](../val/obj/prop/access/optional-chaining "mention")
{% endtab %}
{% endtabs %}
