Javascript不兼容/不一致 [英] Javascript Incompatibilities/Inconsistencies

问题描述

我希望在几周内做一个演示，并且想知道：在开发时你需要注意的十大Javascript不兼容性是什么？你绊倒了什么？我可以从一开始：

I'm looking to do a presentation in a couple of weeks and was wondering: What are the top ten Javascript incompatibilities that you look out for when developing? What trips you up? I can start with one:

var somevar = {
 'internet': 'explorer',
 'hates': 'trailing',
 'commas': 'in',
 'json': 'code', // oh noes!
}

有哪些其他常见问题无法解决或未解决使用像jQuery或base这样的框架？

What are some other common gotchas that can't or aren't fixed by using a framework like jQuery or base?

推荐答案

var x = new Boolean（false）; if（x）... else ...;

var x = new Boolean(false); if (x) ... else...;

是否采用'if'或'else'分支？

Is the 'if' or 'else' branch taken?

var x =hi，y = new String（hi）;

var x = "hi", y = new String("hi");

typeof（x）和typeof（y）是什么？

what is the typeof(x) and typeof(y) ?

编辑：..

parseInt（017）产生15（八进制）而不是17

parseInt("017") produces 15 (octal) instead of 17

'错误'对象是从IE到Firefox的不同签名。

The 'Error' object is a different signature from IE to Firefox.

当使用对象作为hashmap时，你需要使用object.hasOwnProperty（key）来确保不通过原型链继承该属性。

When using objects as hashmap's, you need to use object.hasOwnProperty(key) to ensure that the property is not inherited through the prototype chain.

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