一、使用bind方法(构造函数内绑定)
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>三大属性之state使用</title>
</head>
<body>
<div id="test1"></div>
</body>
<script src="./js/babel.min.js" charset="utf-8"></script>
<script src="./js/react.development.js" charset="utf-8"></script>
<script src="./js/react-dom.development.js" charset="utf-8"></script>
<script type="text/babel">
<!DOCTYPE html>
<html
