I want open certain links in a new tab. Since I can't set it directly into the <a>
tag, I want to put the link into <span>
tags with a certain class name and set the target attribute via JavaScript.
I thought this would be easy, but I can't get it working:
addOnloadHook(function () {
document.getElementByClassName('newTab').getElementsByTagName('a').setAttribute('target', '_blank');
});
<span class="newTab"><a href="http://www.com">Link</a></span>
What am I doing wrong?
document.getElementByClassName
does not exist, the correct function is document.getElementsByClassName
(note the extra s
). It returns an array of matching nodes, so you've to give an index:
addOnloadHook(function () {
document.getElementsByClassName('newTab')[0].getElementsByTagName('a')[0].setAttribute('target', '_blank');
});
but you might need to iterate through every span with the specified class ('newTab') on the page for it to work:
addOnLoadHook(function(){
var span = document.getElementsByClassName('newTab');
for(var i in span) {
span[i].getElementsByTagName('a')[0].setAttribute('target','_blank');
}
});
in case you'll have more than 1 anchor tag in a span you'd also have to iterate through the anchor tags like this:
addOnLoadHook(function(){
var span = document.getElementsByClassName('newTab');
for(var i in span){
var a = span[i].getElementsByTagName('a');
for(var ii in a){
a[ii].setAttribute('target','_blank');
}
}
});
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