Function windowIsFocused

content_scripts/vimium_frontend.js:13–15

()

// We track whther the current window has the focus or not.
let windowHasFocus = null;
function windowIsFocused() {
  return windowHasFocus;
}

function initWindowIsFocused() {
  DomUtils.documentReady().then(() => windowHasFocus = document.hasFocus());