将事件侦听器添加到从数组创建的按钮中

Question

I'm creating buttons out of "tags" taken from my database. I'd like to add mouse event listeners to each button. However, the listener only seems to work on the last created button. Any ideas? Thanks.

var tagsContainer = document.getElementById('tags');
var tagarray = placetags.split(" ");
for (var tagcounter = 0; tagcounter < tagarray.length; tagcounter++){
  var tag = document.createElement('input');
  tag.type = 'button';
  tag.value = tagarray[tagcounter];
  tag.id = 'tagbutton';
  tagsContainer.appendChild(tag);
  tag.addEventListener('mouseover' , function(){
    tag.style.color = 'white';
  });
  tag.addEventListener('mouseout' , function(){
    tag.style.color = 'orange';
  });
}

Answer 1

You need to change your handlers from this

tag.addEventListener('mouseover' , function(){
    tag.style.color = 'white';
});

to this

tag.addEventListener('mouseover' , function(){
    this.style.color = 'white';
});

Since with your original code, your handlers are closing over the tag variable, and so tag ends up referring to the last button created.