Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

window.scrollBy() gets sent back after returning from in `content_script.js`

  • Akukho zimpendulo
  • 1 inale nkinga
more options

I'm practicing my Javascript with a very simple static HTML page.

I have a sticky footer on top set with CSS. I attached click events to the page's menu anchor tags to jump to the section in the page. Since the header is fixed, the jumped-to section will be covered by the fixed header's height. Therefore I have something like this in my JS script.

     window.scrollBy(0, -parseInt(fixedHeaderHeight.slice(0, 2)));

I have run this in the debugger and everything works in my script. The page gets scrolled back to header's height. However, when I keep on entering the scripts built-in Firefox I stumble upon a function that register's a click event in `content_script.js`.

this one:

window.addEventListener("click", function(e){

 if ( document.body.classList.contains("js-fbc-prompt-active") ) {
   const activePrompt = findActivePrompt();
   const activePromptTarget = document.querySelector(".fbc-has-badge.js-fbc-prompt-active");
   if ( !activePrompt.contains( && !activePromptTarget.contains( ) {
 } else {


after returning from the function above, window.scrollBy() gets undone, meaning that my section's title gets covered by my fixed header.

Why is this happening? Shouldn't this script NOT intervene with anything that happens in my own script?

Okulungisiwe ngu rostranjj

Kufanele ulogele ukungena ku-akhawunti yakho ukuze uphendule amaphosti. Uyacelwauqale umbuzo omusha, uma ungekabi nayo i-akhawunti namanje.