@qn-pandora/pandora-visualization/lib/polyfill/composePath.js

Pandora 通用可视化库

"use strict";
var eventProto = Event.prototype;
eventProto.propagationPath = function propagationPath() {
    var _this = this;
    function getParent(element) {
        // SVGElement.parentElement is undefined in ie11
        return element.parentElement === undefined
            ? element.parentNode
            : element.parentElement;
    }
    var polyfill = function () {
        var element = _this.target || null;
        var pathArr = [element];
        if (!element || !getParent(element)) {
            return [];
        }
        while (getParent(element)) {
            element = getParent(element);
            pathArr.unshift(element);
        }
        return pathArr;
    };
    return this.path || (this.composedPath && this.composedPath()) || polyfill();
};