Google Apps Script 支持哪个版本的 ECMA-262? [英] Which Edition of ECMA-262 Does Google Apps Script Support?

问题描述

根据这个帖子来自旧的 Google Group，Apps Script 基于 ECMA-262 第 3 版.

According to this thread from the old Google Group, Apps Script is based on ECMA-262 3rd Edition.

编辑器中的自动完成功能显示第 3 版数组函数这一事实似乎支持了这一点.

This would seem to be supported by the fact that auto-completion in the editor displays 3rd Edition array functions.

但是下面的代码运行得很好，这让人怀疑:

However the following code runs perfectly well, which casts doubt on the matter:

var array = [
  1,2,3,4,5
];

Logger.log("forEach:");
array.forEach(function (item,idx,arr) {
  Logger.log(item); 
});

注意 ECMA-262 第 5 版数组函数 forEach 的使用.

Note the use of ECMA-262 5th Edition Array function forEach.

是否会有权威人士给出明确的答案，说明为什么会这样?依赖第 5 版的所有功能或已实施且似乎有效的子集是否安全?

Would someone authoritative mind giving a definitive answer on why this is the case? And whether it's safe to rely on all 5th Edition features or a sub-set that have been implemented and seem to work?

推荐答案

documentation 说旧的运行时基于 Mozilla 的 Rhino JavaScript 解释器，它提供了 ECMAScript 的子集5 并基于 1.6，略有 1.7 和 1.8.

The documentation says that the old runtime is based on Mozilla's Rhino JavaScript interpreter which provides a subset of ECMAScript 5 and is based on 1.6, with a smattering of 1.7 and 1.8.

V8 运行时支持新的 Apps 脚本运行时除了 E6 模块等少数例外.

The new Apps Script runtime is supported by the V8 runtime with few exceptions like E6 Modules.

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