Accessing to attributes via methods in JavaScript
Custom attributes can also be accessed using
methods like getAttribute, in which
case the full name of the attribute should
be written:
<div id="elem" data-num="1000" data-my-num="2000"></div>
let elem = document.querySelector('#elem');
console.log(elem.getAttribute('data-num')); // shows 1000
console.log(elem.getAttribute('data-my-num')); // shows 2000
Given paragraphs. Go through them in a loop
and for each paragraph write down the ordinal
number of this paragraph into the data-num
attribute. Use the setAttribute method.
