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JavaScript中的保留关键字

2023-04-13 03:06:00

Reserved keywords in JavaScript

保留了哪些JavaScript关键字(函数名称，变量等)？

这是我的诗，其中包含JavaScript中所有保留的关键字，专门针对那些当下保持诚实，而不仅仅是尝试得分的人：

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Let this long package float,
Goto private class if short.
While protected with debugger case,
Continue volatile interface.
Instanceof super synchronized throw,
Extends final export throws.

Try import double enum?
- False, boolean, abstract function,
Implements typeof transient break!
Void static, default do,
Switch int native new.
Else, delete null public var
In return for const, true, char
…Finally catch byte.

我们应该链接到实际的信息来源，而不仅仅是热门的Google热门网站。

http://developer.mozilla.org/En/Core_JavaScript_1.5_Reference/Reserved_Words

JScript 8.0：
http://msdn.microsoft.com/zh-CN/library/ttyab5c8.aspx

要补充benc的答案，请参阅标准ECMA-262。这些是官方保留字，但只有学徒会忽略实现以尊重标准。有关最受欢迎的实现(即Firefox和Internet Explorer)的保留字，请参阅benc的答案。

EMCAScript-262中的保留字是关键字，将来的保留字，NullLiteral和BooleanLiterals，其中关键字是

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break do instanceof typeof
case else new var
catch finally return void
continue for switch while
debugger function this with
default if throw
delete in try

未来保留字是

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abstract export interface static
boolean extends long super
byte final native synchronized
char float package throws
class goto private transient
const implements protected volatile
double import public
enum int short

NullLiteral是

null

和BooleanLiterals是

1 2	true false

我刚刚在JavaScript和jQuery中阅读了此内容：The Missing Manual：

Not all of these reserved words will cause problems in all browsers, but it’s best to steer clear of these names when naming variables.

JavaScript keywords: break, case, catch, continue, debugger, default, delete, do, else, false, finally, for, function, if, in, instanceof, new, null, return, switch, this, throw, true, try, typeof, var, void, while, with.

Reserved for future use: abstract, boolean, byte, char, class, const, double, enum, export, extends, final, float, goto, implements, import, int, interface, let, long, native, package, private, protected, public, short, static, super, synchronized, throws, transient, volatile, yield.

Pre-defined global variables in the browser: alert, blur, closed, document, focus, frames, history, innerHeight, innerWidth, length, location, navigator, open, outerHeight, outerWidth, parent, screen, screenX, screenY, statusbar, window.

这是一种与浏览器和语言版本无关的方法，用于确定JavaScript引擎是否将特定字符串视为关键字。归功于此答案，它提供了解决方案的核心。

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