Direct dry goods:

0. Checkbox

$(":checked") = $("input:checked")Copy the code

1, checkbox is not checked

$("input:not(:checked)")
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1) attribute l=4 and value! = 0

$('input[l=4][value!=0]')
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2) Attribute l=4 or value! = 0

$('input[l=4],[value!=0]')
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3) Attribute l=4 and value! =0 and the checkbox is not checked

$("input:not(:checked)[l=4][value!=0]");
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Reference article:

JQuery Reference Manual – Selectors

Jquery attribute selector (with or without multiple criteria)