如何将此 jQuery 代码转换为 Vanilla JS？

Question

How to convert this jquery code

$(element).find('.ui.dropdown') 

to pure JS?

I need to convert a simple code in JQUERY to pure JS.

The element is a variable in my code, it comes from this code:

$.each($("[action]").toArray(), function(key, element)

Answer 1

How about the following?

Array.prototype.slice.call(document.querySelectorAll('[action]')).forEach(function (element, index) {
  element.querySelector('.ui.dropdown')
  // do something to the element
});

As noted, Array.prototype.slice() is only needed if the browser you're running doesn't support NodeList.prototype.forEach() . For modern browsers you can actually do:

document.querySelectorAll('[action]').forEach(function (element, index) {
   element.querySelector('.ui.dropdown')
  // do something to the element
});