ES5 Object polyfills/shims

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It's convoluted and/or impossible to shim some ES5 Object methods in legacy browsers, especially IE6-8. Most other ES5 features, like those in Array, String, Date, aren't as crazy to implement. ES5 shim libraries such as cujojs/poly (https://github.com/cujojs/poly) or kriskowal/es5-shim (https://github.com/kriskowal/es5-shim) do a decent job shimming some Object methods, but inevitably create unreliable edge cases (or even undesirable limitations in some cases). By filling out this form, you can help us figure out where to put the most resources and how to choose appropriate strategies for shimming legacy browsers.

Which of the following ES5 Object methods are most important to your work?

even if you can't use these features now (because of browser restrictions, etc.), which would you use if you could? (see http://es5.github.com/#x15.2.3)

Object.getPrototypeOf

Object.getOwnPropertyDescriptor

Object.freeze

Object.isFrozen

Object.seal

Object.isSealed

Object.create (without 2nd param, see next item)

Object.defineProperties or Object.create with 2nd param

Object.defineProperty

Object.keys

Object.getOwnPropertyNames

Object.preventExtensions

Object.isExtensible

Other:

Object.defineProperty / Object.defineProperties: Which property attributes are most critical to your work?

even if you can't use these features now (because of browser restrictions, etc.), which would you use if you could? (see http://es5.github.com/#x8.6.1)

enumerable (property is available to a for...in loop)

configurable (property attributes can be changed using Object.defineProperty)

getter (property uses a function to get its value)

setter (property uses a function to set its value)

writeable (property is read-only or not)

value (the property's value)

On which browsers do you (will you) require these Object methods?

if you don't see a recent browser here, it's likely because shimming is unnecessary or straightforward (see http://kangax.github.com/es5-compat-table/)

IE 6

IE 7

IE 8

Opera 10

Opera 11

Firefox 3.5

Firefox 3.6

Safari 3.2

Safari 4

Safari 5.0 (not 5.1)

Other:

Do you share javascript code between server-side and client-side? (NodeJS, RingoJS, Rhino, etc.)

Yes! I am currently doing this.

No, but I want to soon.

No, and I probably won't any time soon

wut? you can run javascript on the server?

Other:

Clear selection

How important is ES5 shimming / polyfilling to your work?

MUST HAVE ES5 NAO

I prefer to use shims / polyfills

Whatevs. I'm cool either way

I might use them once in a while

I prefer abstraction to shimming

what is es5?

Other:

Clear selection

Any additional comments / concerns?

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