删除所有活动的班级，然后切换班级-javascript

Question

I'm trying to create a simple accordion, I've got the javascript working to toggle the class active on click of the item, but on the HTML i've already got the first item as active.

So basically I want it to work where you click other accordion header, the one that is open closes, and the one you clicked on opens.

I tried using classList.remove(active) before the toggle but threw and error.

Here is the link to what i've done so far:

var accordionLink = document.getElementsByClassName('accordion-item')
    for(var i = 0; i < accordionLink.length; i++) {
        var elem = accordionLink[i];
        elem.addEventListener('click', function(event){
            this.classList.toggle('active');
            event.preventDefault();
        }, false);
    }

https://codepen.io/anishpixellabs/pen/deNbKE

Any help would be great.

Regards

Answer 1

Have a look at this lines, I'm pretty sure something like this should work.

 var accordionLink = document.getElementsByClassName('accordion-item') for (var i = 0; i < accordionLink.length; i++) { var elem = accordionLink[i]; elem.addEventListener('click', function(event) { for (var j = 0; j < accordionLink.length; j++) accordionLink[j].classList.remove("active") this.classList.add('active'); event.preventDefault(); }, false); } 

Some explanations:

for (var i = 0; i < accordionLink.length; i++) {     // loop trough all elements to add "onClick event"
  var elem = accordionLink[i];                       // "elem" is current element
  elem.addEventListener('click', function(event) {   // adding "onClick" to current "elem"
    for (var j = 0; j < accordionLink.length; j++)   // ONCLICK trigger: "Loop trough all elements of 'accordionLink'
      accordionLink[j].classList.remove("active")    // remove the 'active class' for every occurrence of 'accordionLink'-class"
    this.classList.add('active');                    // add "active"-class to element that received ONCLICK-trigger
    event.preventDefault();
  }, false);
}