node.js支持哪个版本的Javascript [英] What version of Javascript is supported in node.js

问题描述

我开始使用Node.js并且我很难弄清楚节点支持哪个版本的JavaScript，这使得我很难弄清楚我可以使用哪些功能。这就是我所知道的。

I'm getting started with Node.js and I'm having a hard time figuring out what version of JavaScript is supported by node which makes it difficult figuring out what features I can use. Here's what I know.

• Node 使用V8


• V8 按规定实施ECMAScript在ECMA-262，第3版


• ECMA-262，第3版是 JavaScript 1.5

• Node uses V8
• V8 implements ECMAScript as specified in ECMA-262, 3rd edition
• ECMA-262, 3rd edition is JavaScript 1.5

鉴于此，我认为我可以在节点中使用JavaScript 1.5兼容代码。但是，事实证明我可以使用 数组。 forEach ，以及其他结构，即使根据MDC，它在Javascript 1.6 - ECMA-262，第5版之前不可用。

Given this, I would assume I can use JavaScript 1.5 compatible code in node. However, it turns out I can use the Array.forEach, among other constructs, even though according to MDC it isn't available until Javascript 1.6 -- ECMA-262, 5th edition.

我哪里错了？是否有某个文档详细说明了可用的语言功能？

Where am I going wrong? Is there a document somewhere that details the available language features?

推荐答案

这个矩阵（V8紧跟WebKit专栏）似乎很好地回答了我可以使用哪些功能？的问题。但是我找不到支持哪个版本的javascript？的规范答案。据我所知，最佳答案是：支持ECMA-262第3版，但也支持第5版的许多功能。

This matrix (V8 follows the WebKit column fairly closely) seems to pretty well answer the question "what features can I use?" but I can't find a canonical answer to "what version of javascript is supported?" As far as I can tell, the best answer is this: ECMA-262 3rd edition is supported, but many features of the 5th edition are also supported.

有一个很好的解释为什么V8遵循此主题。

There's a good explanation of why V8 follows the WebKit and JavaScriptCore functionality on this thread.

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