慕丝7291255
<div id="app">
</div><button id="btn" style="margin-top:20px">dispatchEvent</button>var ev = new Event('mouseenter')var app = document.getElementById('app')var btn = document.getElementById('btn')
btn.addEventListener('click',function(){
app.dispatchEvent(ev)
})
app.addEventListener('mouseenter',function(){ console.log('mouseenter')
})使用ReactTestUtils来模拟事件