ReferenceError:是不是定义
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js" type="text/javascript"></script>
未捕获的(在承诺)ReferenceError:反应是不定
{
"presets": [
"@babel/preset-env",
["@babel/preset-react", {"runtime": "automatic"}]
]
}