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var element = document.getElementsByTagName("div")[0];
var id = element.id;
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var inputs = document.getElementsByTagName("input");
for (var i = 0; i < inputs.length; i++) {
alert(inputs[i].id);
}
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async function test (){
document.body.innerHTML = await "<foo id='successGetID'>Hello Wolrd</foo>";
var init = await document.getElementsByTagName("foo")[0].id;
alert( init );
}
test();