I am struggling to implement tabbing functionality on a Facebook application (business) tabs.
Despite having some basic HTML and JS [fbjs], the code I have doesn't seem to be working. I can't figure out what is wrong.
<div id="foo">foo div</div>
<script><!--
function changeText(evt){
evt.target.style.display = "none";
}
var foo = document.getElementById('foo');
foo.addEventListener('click',changeText);
//--> </script>
What could I be missing?
Chrome is the browser where this code functions correctly for me. Can you specify which browser you are using? Also, have you checked if there is any other element with the same id "foo" in the page where you are trying to embed this code?
When running scripts on Facebook, the JavaScript and DOM environment is actually altered by Facebook itself. This is done through FBJS (Facebook JavaScript), wrapping things like events and DOM elements. Due to this alteration, accessing styles using DOM_Element.style.some_attribute will not work as expected. Instead, you will need to utilize DOM_Element.getStyle() and DOM_Element.setStyle().
Events on Facebook follow W3C specifications:
As mentioned in the documentation:
//add event listener to 'foo' div (mouseover & mouseout)
document.getElementById('foo').addEventListener('mouseover',myEventHandler);
document.getElementById('foo').addEventListener('mouseout',myEventHandler);
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