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javascriptjquery-selectorsecmascript-6

Check if any element in a NodeList has a specific class using ES6

I want to check if any element in a NodeList has a specific class.

For example, with jQuery I just do something like:

//if any .item element has active class, return true
var isActive = $(".item").hasClass("active");

Only with Javascript I could do, but with a slightly longer code:

var isActive = false;
var items = Array.from(document.getElementsByClassName("item"));

items.forEach(function(item, index) {
  if(item.className.indexOf('active') > 0) {
	isActive = true;
  }
});

alert(isActive);
<div class="item">1</div>
<div class="item">2</div>
<div class="item active">3</div>
<div class="item">4</div>

How can I do this with ES6? There is a helper for selectors?

Thanks!

Solution

  • It has nothing to do with ES2015, but you can use document.querySelector() much like the basic jQuery API:

     var isActive = document.querySelector(".item.active") != null;