Function init

content_scripts/scroller.js:188–192

()

// ultimately translated to relative scrolls. CoreScroller is not exported.
const CoreScroller = {
  init() {
    this.time = 0;
    this.lastEvent = this.keyDownKey = null;
    this.installCancelEventListener();
  },

  // This installs listeners for events which should cancel smooth scrolling.
  installCancelEventListener() {