ECMA262 章节1 2 3

1 Scope This Standard defines the ECMAScript 2021 general-purpose
programming language.

1 范围
本标准定义了 ECMAScript 2021 通用编程语言。

2 Conformance A conforming implementation of ECMAScript must provide
and support all the types, values, objects, properties, functions, and
program syntax and semantics described in this specification.

2 符合性
ECMAScript 的符合实现必须提供和支持本规范中描述的所有类型、值、对象、属性、函数和程序语法和语义。

A conforming implementation of ECMAScript must interpret source text
input in conformance with the latest version of the Unicode Standard
and ISO/IEC 10646.

符合 ECMAScript 的实现必须按照最新版本的 Unicode 标准和 ISO/IEC 10646 来解释源文本输入。

A conforming implementation of ECMAScript that provides an application
programming interface (API) that supports programs that need to adapt
to the linguistic and cultural conventions used by different human
languages and countries must implement the interface defined by the
most recent edition of ECMA-402 that is compatible with this
specification.

ECMAScript 的符合实现，它提供了一个应用程序编程接口 （API），支持需要适应不同人类语言和国家/地区使用的语言和文化约定的程序，必须实现最新版本 ECMA-402 定义的接口，该接口与此规范兼容。

A conforming implementation of ECMAScript may provide additional
types, values, objects, properties, and functions beyond those
described in this specification. In particular, a conforming
implementation of ECMAScript may provide properties not described in
this specification, and values for those properties, for objects that
are described in this specification.

ECMAScript 的符合性实现可以提供超出本规范中描述的其他类型、值、对象、属性和函数。特别是，ECMAScript 的符合实现可能会为此规范中描述的对象提供本规范中未描述的属性和这些属性的值。

A conforming implementation of ECMAScript may support program and
regular expression syntax not described in this specification. In
particular, a conforming implementation of ECMAScript may support
program syntax that makes use of any “future reserved words” noted in
subclause 11.6.2 of this specification.

ECMAScript 的符合实现可能支持本规范中未描述的程序和正则表达式语法。特别是，符合 ECMAScript 的实现可能支持程序语法，该语法使用本规范第 11.6.2 节中注明的任何"未来保留词"。

A conforming implementation of ECMAScript must not implement any
extension that is listed as a Forbidden Extension in subclause 16.1.

符合 ECMAScript 的实现不得实施第 16.1 条中列为禁止扩展的任何扩展。

3 Normative References The following referenced documents are
indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any
amendments) applies.

3 规范参考
以下引用的文档对于本文档的应用是必不可少的。对于日期引用，仅适用引用的版本。对于未注明日期的引用，适用引用文档的最新版本（包括任何修订）。

ISO/IEC 10646 Information Technology — Universal Multiple-Octet Coded
Character Set (UCS) plus Amendment 1:2005, Amendment 2:2006, Amendment
3:2008, and Amendment 4:2008, plus additional amendments and
corrigenda, or successor

ISO/IEC 10646 信息技术 – 通用多八进制编码字符集 （UCS） 加上修正案 1：2005、修正案 2：2006、修正案 3：2008 和修正案 4：2008，以及附加修正案和更正、或后续

ECMA-402, ECMAScript 2015 Internationalization API Specification.
https://ecma-international.org/publications/standards/Ecma-402.htm

ECMA-404, The JSON Data Interchange Format.
https://ecma-international.org/publications/standards/Ecma-404.htm

ECMA-402，ECMAScript 2015 国际化 API 规范。
https://ecma-international.org/publications/standards/Ecma-402.htm

ECMA-404，JSON 数据交换格式。
https://ecma-international.org/publications/standards/Ecma-404.htm