function dispatchEventWithEventLog(shadow, target, event) { var eventPath = []; var targets = []; var relatedTargets = []; var pathAtTargets = []; var attachedNodes = []; for (var nodeKey in shadow) { var startingNode = shadow[nodeKey]; for (var node = startingNode; node; node = node.parentNode) { if (attachedNodes.indexOf(node) >= 0) continue; attachedNodes.push(node); node.addEventListener(event.type, (function (event) { eventPath.push(this.label); relatedTargets.push(event.relatedTarget ? event.relatedTarget.label : null); pathAtTargets.push(event.composedPath().map(function (node) { return node.label; })); targets.push(event.target); }).bind(node)); } } target.dispatchEvent(event); return {event: event, targets: targets, eventPath: eventPath, relatedTargets: relatedTargets, pathAtTargets: pathAtTargets}; } /* -SR: ShadowRoot -S: Slot A ------------------------------- A-SR + B ------------ B-SR + A1 --- A1-SR + C + B1 --- B1-SR + A2-S + A1a + D --- D-SR + B1a + B1b --- B1b-SR + D1 + B1c-S + B1b1 + B1b2 */ function createFixedTestTree(mode) { var namedNodes = {}; function element(name) { var element = document.createElement(name.indexOf('-S') > 0 ? 'slot' : 'div'); element.label = name; namedNodes[name] = element; for (var i = 1; i < arguments.length; i++) { var item = arguments[i]; if (typeof(item) == 'function') item(element); else element.appendChild(item); } return element; } function shadow(name) { var children = []; for (var i = 1; i < arguments.length; i++) children.push(arguments[i]); return function (element) { var shadowRoot = element.attachShadow({mode: mode}); shadowRoot.label = name; namedNodes[name] = shadowRoot; for (var child of children) shadowRoot.appendChild(child); } } var host = element('A', shadow('A-SR', element('A1', shadow('A1-SR', element('A1a'))), element('A2-S') ), element('B', shadow('B-SR', element('B1', shadow('B1-SR', element('B1b', shadow('B1b-SR', element('B1b1'), element('B1b2'))), element('B1c-S')), element('B1a'))), element('C'), element('D', shadow('D-SR', element('D1'))))); return namedNodes; }