_process()

in src/site/assets/js/bootstrap.esm.js [4441:4477]


  _process() {
    const scrollTop = this._getScrollTop() + this._config.offset;

    const scrollHeight = this._getScrollHeight();

    const maxScroll = this._config.offset + scrollHeight - this._getOffsetHeight();

    if (this._scrollHeight !== scrollHeight) {
      this.refresh();
    }

    if (scrollTop >= maxScroll) {
      const target = this._targets[this._targets.length - 1];

      if (this._activeTarget !== target) {
        this._activate(target);
      }

      return;
    }

    if (this._activeTarget && scrollTop < this._offsets[0] && this._offsets[0] > 0) {
      this._activeTarget = null;

      this._clear();

      return;
    }

    for (let i = this._offsets.length; i--;) {
      const isActiveTarget = this._activeTarget !== this._targets[i] && scrollTop >= this._offsets[i] && (typeof this._offsets[i + 1] === 'undefined' || scrollTop < this._offsets[i + 1]);

      if (isActiveTarget) {
        this._activate(this._targets[i]);
      }
    }
  }