Function ScrollSmoother

esm/ScrollSmoother.js:86–951

(vars)

export var ScrollSmoother = /*#__PURE__*/function () {
  function ScrollSmoother(vars) {
    var _this = this;

    _coreInitted || ScrollSmoother.register(gsap) || console.warn("Please gsap.registerPlugin(ScrollSmoother)");
    vars = this.vars = vars || {};
    _mainInstance && _mainInstance.kill();
    _mainInstance = this;

    _context(this);

    var _vars = vars,
        smoothTouch = _vars.smoothTouch,
        _onUpdate = _vars.onUpdate,
        onStop = _vars.onStop,
        smooth = _vars.smooth,
        onFocusIn = _vars.onFocusIn,
        normalizeScroll = _vars.normalizeScroll,
        wholePixels = _vars.wholePixels,
        content,
        wrapper,
        height,
        mainST,
        effects,
        sections,
        intervalID,
        wrapperCSS,
        contentCSS,
        paused,
        pausedNormalizer,
        recordedRefreshScroll,
        recordedRefreshScrub,
        allowUpdates,
        self = this,
        effectsPrefix = vars.effectsPrefix || "",
        scrollFunc = ScrollTrigger.getScrollFunc(_win),
        smoothDuration = ScrollTrigger.isTouch === 1 ? smoothTouch === true ? 0.8 : parseFloat(smoothTouch) || 0 : smooth === 0 || smooth === false ? 0 : parseFloat(smooth) || 0.8,
        speed = smoothDuration && +vars.speed || 1,
        currentY = 0,
        delta = 0,
        startupPhase = 1,
        tracker = _getVelocityProp(0),
        updateVelocity = function updateVelocity() {
      return tracker.update(-currentY);
    },
        scroll = {
      y: 0
    },
        removeScroll = function removeScroll() {
      return content.style.overflow = "visible";
    },
        isProxyScrolling,
        killScrub = function killScrub(trigger) {
      trigger.update(); // it's possible that it hasn't been synchronized with the actual scroll position yet, like if it's later in the _triggers Array. If it was already updated, it'll skip the processing anyway.

      var scrub = trigger.getTween();

      if (scrub) {
        scrub.pause();