1. Now I"m going to work on the react project
. which version should I use?
the latest is react 16, react-router4.0, webpack4.0? These three?
=
< html >
< head >
<meta charset="UTF-8" />
<title> React </title>
<script src="https://cdn.bootcss.com/react/15.4.2/react.min.js"></script>
<script src="https://cdn.bootcss.com/react/15.4.2/react-dom.min.js"></script>
<script src="https://cdn.bootcss.com/babel-standalone/6.22.1/babel.min.js"></script> < / head >
< body >
<div id="example"></div>
<script type="text/babel">
var arr = [
<h1></h1>,
<h2></h2>,
];
ReactDOM.render(
<div>{arr}</div>,
document.getElementById("example")
);
</script>< / body >
< H1 > < / html > < / H1 > Why don"t the H1 and H2 tags in the array arr in the code be enclosed in quotation marks? Isn"t it a string?
and here the quality will appear key warning