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#11483 closed enhancement (plugin)

Opened March 16, 2012 08:57PM UTC

Closed April 04, 2012 06:57PM UTC

"current" context for add

Reported by: gibson042 Owned by: gibson042
Priority: undecided Milestone: None
Component: unfiled Version: 1.7.1
Keywords: Cc:
Blocked by: Blocking:

add is the only traversing method that does not use "current set" as the context for selector arguments. It has a context parameter, but $set.add( selector, context ) is identical to $set.add( $( selector, context ) ) and requires breaking the chain for intermediate variable assignment.

We should special-case context=true to enable code like $setAndNext = $set.add( "+ *", true ) or $form.add(".invalid").

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Change History (8)

Changed March 16, 2012 08:58PM UTC by gibson042 comment:1

Err, that second example should be $form.add( ".invalid", true ).

Changed March 28, 2012 12:33PM UTC by gibson042 comment:2

Any thoughts before @trac-o-bot auto-closes this?

Changed March 28, 2012 01:44PM UTC by dmethvin comment:3

It won't close since it's not "pending". It's worth discussion.

Changed April 04, 2012 01:12AM UTC by dmethvin comment:4

owner: → gibson042
status: newpending

We've had some discussion about relative selectors, which always end up going through Sizzle's JavaScript path. Where would this feature simplify code? Are there some real-life examples?

Changed April 04, 2012 04:51AM UTC by gibson042 comment:5

status: pendingnew

Good comments.

Regarding relative selectors, I doubt this enhancement would much increase their use, because anyone wanting to use $set.add( strRelative, true ) is probably ''already'' using $set.add( selRelative, $set ) or $set.find( selRelative ).andSelf(). But as an aside, isn't @timmywil's big Sizzle overhaul going to seriously improve the Javascript path for scoped queries anyway?

On to examples. .and and its derivative .andSelf seem to be fairly uncommon, but this new syntax would clarify many uses of the former (by eliminating otherwise unnecessary variable declarations) and most of the latter (by avoiding clunky re-adding).

Changed April 04, 2012 05:59PM UTC by dmethvin comment:6

To me, the use of .andSelf() (perhaps renamed to .addPrior() per #9800) is much clearer than using a second Boolean argument to .add(). Admittedly it's not as mystical as .stop(true, true) but the added method name makes it much clearer what is going on.

Changed April 04, 2012 06:45PM UTC by gibson042 comment:7

I agree, and in my opinion we'd be better off if this were the default context for .add( selector ) rather than null (document), but that would be a breaking change.

Can you come up with a better special-case value (null and undefined are probably out, as are strings and user-defined objects—but perhaps a conveniently-mapped true like like jQuery.CONTEXT_SELF?) or (*shudder*) new method name, or is this ticket doomed to rejection by historical contingency?

Changed April 04, 2012 06:57PM UTC by dmethvin comment:8

resolution: → plugin
status: newclosed

I think it makes more sense to do this with .addPrior() or an .addFind(selector) plugin at this point, I'm not a fan at all of a magical second argument. If history were rewritten I agree it might make sense to have .add() use the set elements as context, since it's so easy to add rooted elements via $(). Perhaps we can add a time machine to the 1.9 roadmap.