[whatwg] Proposal: Adding methods like getElementById and getElementsByTagName to DocumentFragments
glenn at zewt.org
Thu Oct 10 07:35:23 PDT 2013
On Thu, Oct 10, 2013 at 9:22 AM, Boris Zbarsky <bzbarsky at mit.edu> wrote:
> On 10/10/13 10:15 AM, Glenn Maynard wrote:
>> When I'm doing this I just make sure that the strings don't need
>> escaping in the first place. Many of these look like they do that
>> (probably most "ID" cases are things like random numbers or
> Let's take a look at Simon's examples from actual web pages:
> .querySelectorAll("#"+M+" "+m)
> If M is a random number, it needs escaping. Similar if classes[i] is a
> random number. In particular, ID and class selectors cannot start with a
That's why I said "many". There are obviously several cases that do need
> FWIW, I rarely use IDs at all: I use classes, even if there will
>> probably only be one of something.
> Classes have the same syntax as IDs in CSS (both are identifiers), so it's
> the same issue.
My point was that I never use getElementById (and getElementsByClassName
returns an array, so it's wrong too).
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