filter("...:first") expands original selector

[zaphod_41]

I create a selector, then filter() that selector and put a length check on the end to see if anything matches, eg

var jSelector = $("foo"); if (jSelector.filter("bar").length > 0) ...

Which works fine. I was hoping I could avoid jQuery filtering the entire selector, by sticking a ":first" on the end of the filter (ie "hey, stop filtering on the first one you find"), eg

if (jSelector.filter("bar:first").length > 0) ...

What happened is that, even though the original selector found no matches (length ==0), the added filter suddenly returned a match (length == 1).

var jNewRows =

$("#table tr:has(td[id$=status] :contains('New'))");

--- console.log(jNewRows) sez []

var a =

jNewRows.filter("td[id$=volume] input[value]");

--- console.log(a) sez []

var b =

jNewRows.filter("td[id$=volume] input[value]:first");

--- console.log(b) sez [input#...] (single entry)

John Finlay ThoughtWorks (403-613-7008)

[dmethvin]

I was going to try and create a test case myself but the markup seems like it may be complext. Please create a complete jsfiddle case with the html.

[trac-o-bot]

Automatically closed due to 14 days of inactivity.