iOS 6 javascript与object.defineProperty的间歇性问题

Question

Has anyone else noticed intermittent errors/issues in the new iOS 6 javascript engine when accessing properties on objects where the property was defined using newer Object.defineProperty syntax?

https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Object/defineProperty

I'm seeing occasions where the javascript will fail stating undefined is not a function on methods of objects accessied as properties on objects defined in this manner.

Answer 1

According to Kangax's ES5 table , "In some versions of WebKit Object.defineProperty does not work with DOM objects." I'm assuming this is what you may be referring to. It's note #2 at the bottom of the page. Hope this helps!

Answer 2

In case you haven't already solved this, make sure the said property is enumerable (and if necessary configurable)...

Object.defineProperty(obj, "key", {
  enumerable: true,
  configurable: true
});