Method update

src/component/tooltip/TooltipHTMLContent.ts:374–402

* Update when tooltip is rendered

(tooltipModel: Model<TooltipOption>)

     * Update when tooltip is rendered
     */
    update(tooltipModel: Model<TooltipOption>) {
        // FIXME
        // Move this logic to ec main?
        if (!this._container) {
            const container = this._api.getDom();
            const position = getComputedStyle(container, 'position');
            const domStyle = container.style;
            if (domStyle.position !== 'absolute' && position !== 'absolute') {
                domStyle.position = 'relative';
            }
        }

        // move tooltip if chart resized
        const alwaysShowContent = tooltipModel.get('alwaysShowContent');
        alwaysShowContent && this._moveIfResized();

        // update alwaysShowContent
        this._alwaysShowContent = alwaysShowContent;

        this._enableDisplayTransition = tooltipModel.get('displayTransition')
            && tooltipModel.get('transitionDuration') > 0;

        // update className
        this.el.className = tooltipModel.get('className') || '';

        // Hide the tooltip
        // PENDING
        // this.hide();
    }

    show(tooltipModel: Model<TooltipOption>, nearPointColor: ZRColor) {
        clearTimeout(this._hideTimeout);