JAVASCRIPT

get id of element javascript

var element = document.getElementsByTagName("div")[0];
var id = element.id;

js how to find element using id

element = document.querySelector("#id");

get id javascript

async function test (){
  document.body.innerHTML = await "<foo id='successGetID'>Hello Wolrd</foo>";
	var init = await document.getElementsByTagName("foo")[0].id;
	alert( init );
}
test();