javascript - Detect elements with attribute without value -

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lets i've got 

<div class="some-class" selected></div>

i'm trying if has attr 'selected', but

$(".some-class").attr("selected") //undefined $(".some-class").is("*[selected]") // false

am able if has selected attrbute if has no value?

try use has attribute selector @ context,

$(".some-class").is("[selected]")

demo


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