JavaScript erhalten Attribut
//HTML
//<div id="elem" data-id="4hJ3s"></div>
var elem = document.getElementById("elem");
elem.getAttribute("data-id"); // "4hJ3s"
TC5550
//HTML
//<div id="elem" data-id="4hJ3s"></div>
var elem = document.getElementById("elem");
elem.getAttribute("data-id"); // "4hJ3s"document.querySelectorAll('[data-foo="value"]');var person = {
"first_name": "Bob",
"last_name": "Dylan"
};
person.hasOwnProperty('first_name'); //returns true
person.hasOwnProperty('age'); //returns falseconst link = document.querySelector('a');
console.log(link.getAttribute('href'));//find first element with "someAttr" attribute
document.querySelector('[someAttr]')
<!-- example div in an html DOC -->
<div id="div1">Hi Champ!</div>
// in a console
const div1 = document.getElementById('div1');
//=> <div id="div1">Hi Champ!</div>
const exampleAttr= div1.getAttribute('id');
//=> "div1"
const align = div1.getAttribute('align')
//=> null