Vanilla JS - 将属性设置为所有元素

Question

I need help to populate the text from each element of span and em into Attribute for each elements.

Expected Results

 var spanTxt = document.querySelector("div a span").textContent; var emTxt = document.querySelector("div a em").textContent; var divAll = document.querySelectorAll("section a"); for(var i=0; i<divAll.length; i++){ divAll[i].setAttribute("list-span", spanTxt); divAll[i].setAttribute("list-em", emTxt); }

 <section> <div><a href="#">Line <span>Test 1</span> <em>One</em></a></div> <div><a href="#">Line <span>Test 2</span> <em>Two</em></a></div> </section>

Answer 1

const linksArray = Array.from(document.querySelectorAll('section a')); // we use Array.from to transform the NodeList from querySelectorAll to an array. Needs to IE11

linksArray.forEach(linkEl => { // we search for every span and em inside the link
 linkEl.setAttribute("list-span", linkEl.querySelector('span').textContent);
 linkEl.setAttribute("list-em", linkEl.querySelector('em').textContent);
});

http://jsfiddle.net/7v3womnt/