40   const ev = new Event('foo');  constant
41   strictEqual(ev.type, 'foo');
42   strictEqual(ev.cancelable, false);
43   strictEqual(ev.defaultPrevented, false);
44   strictEqual(typeof ev.timeStamp, 'number');
47   deepStrictEqual(ev.composedPath(), []);
48   strictEqual(ev.returnValue, true);
49   strictEqual(ev.bubbles, false);
50   strictEqual(ev.composed, false);
51   strictEqual(ev.isTrusted, false);
52   strictEqual(ev.eventPhase, 0);
53   strictEqual(ev.cancelBubble, false);
56   ev.preventDefault();
57   strictEqual(ev.defaultPrevented, false);
74   const ev = new Event('foo');  constant
75   strictEqual(ev.cancelBubble, false);
76   ev.cancelBubble = true;
77   strictEqual(ev.cancelBubble, true);
80   const ev = new Event('foo');  constant
81   strictEqual(ev.cancelBubble, false);
82   ev.stopPropagation();
83   strictEqual(ev.cancelBubble, true);
86   const ev = new Event('foo');  constant
87   strictEqual(ev.cancelBubble, false);
88   ev.cancelBubble = 'some-truthy-value';
89   strictEqual(ev.cancelBubble, true);
97   const ev = new Event('foo', {}, {});  constant
98   strictEqual(ev.type, 'foo');
101   const ev = new Event('foo');  constant
102   strictEqual(ev.cancelBubble, false);
103   ev.cancelBubble = true;
104   strictEqual(ev.cancelBubble, true);
107   const ev = new Event('foo');  constant
108   strictEqual(ev.cancelBubble, false);
109   ev.stopPropagation();
110   strictEqual(ev.cancelBubble, true);
113   const ev = new Event('foo');  constant
114   strictEqual(ev.cancelBubble, false);
115   ev.cancelBubble = 'some-truthy-value';
116   strictEqual(ev.cancelBubble, true);
119   const ev = new Event('foo', { cancelable: true });  constant
120   strictEqual(ev.type, 'foo');
121   strictEqual(ev.cancelable, true);
122   strictEqual(ev.defaultPrevented, false);
124   ev.preventDefault();
125   strictEqual(ev.defaultPrevented, true);
129   const ev = new Event('foo');  constant
130   deepStrictEqual(Object.keys(ev), ['isTrusted']);
159   const ev = new SubEvent('foo');  constant
161   const fn = common.mustCall((event) => strictEqual(event, ev));
163   eventTarget.dispatchEvent(ev);
220   const ev = common.mustCall((event) => {  constant
226   eventTarget.addEventListener('foo', ev, { once: true });
435   const ev = new Event('toString');  constant
438   target.dispatchEvent(ev);
442   const ev = new Event('__proto__');  constant
445   target.dispatchEvent(ev);