It is like @CanIUse but for the browser devtools, created & curated by @pankajparashar. Get weekly tips & tricks for your favorite browser devtools by subscribing to the newsletter!
Open devtools. Press Shift+Cmd+P on Mac or Ctrl+Shit+P on Windows/Linux/Chrome OS to open the Command Menu.
Search for "Disable JavaScript" and press Enter to execute the command.
The yellow warning icon next to the Sources panel is the indicator that the JavaScript is disabled. It will continue to be disabled until the devtools is closed.