Method update

src/components/Tooltip.js:77–108

({ title, items, position })

  // update tooltip position / content
  update({ title, items, position }) {
    if (title && title !== this.title) {
      this.title = title;
      this.tipTitle.text(title);
    }

    if (items && JSON.stringify(items) !== JSON.stringify(this.items)) {
      this.items = items;

      this.tipItems.forEach((g) => g.svg.remove());

      this.tipItems = this.items.map((item, i) => {
        const g = this._generateTipItem(item, i);
        return g;
      });

      const maxWidth = Math.max(
        ...this.tipItems.map((item) => item.width),
        this.tipTitle.node().getBBox().width,
      );

      this.tipBackground
        .attr('width', maxWidth + 15)
        .attr('height', this._getBackgroundHeight());
    }

    if (position) {
      this.position = position;
      this.svg.attr('x', this._getUpLeftX());
      this.svg.attr('y', this._getUpLeftY());
    }
  }

  _generateTipItem(item, i) {
    const svg = this.svg.append('svg');