miscoded

Harvested from an Opera bug report, here is another interesting surprise from Gecko internals: Object.prototype.eval . It's like a normal eval() but in the scope of that object. In other words, doing

document.body.eval('tagName');

is practically the same as doing

with(document.body){eval('tagName');}

(Before you ask, the best practice would be to say either

document.body.tagName

or

document.body['tagName']

Using eval should be avoided and generally can be avoided without problems. So don't let me catch you using any of the two first snippets on a production site!)

So hey Gecko, where did this come from? Is it something we should copy and implement or something we should scorn and point fingers at?