Function style

docs/app/js/sanddance-app.js:124296–124309

* Update the presentation attributes of an SVG element for a mark item. * @param {SVGElement} el - The SVG element. * @param {Item} item - The mark item.

(el, item)

   * @param {SVGElement} el - The SVG element.
   * @param {Item} item - The mark item.
   */ style (el, item) {
        if (item == null) return;
        for(const prop in styles){
            let value9 = prop === "font" ? fontFamily(item) : item[prop];
            if (value9 === values[prop]) continue;
            const name = styles[prop];
            if (value9 == null) el.removeAttribute(name);
            else {
                if (isGradient(value9)) value9 = gradientRef(value9, this._defs.gradient, href());
                el.setAttribute(name, value9 + "");
            }
            values[prop] = value9;
        }
    },
    /**
   * Render SVG defs, as needed.
   * Must be called *after* marks have been processed to ensure the