after_leaving的博客

引用react.js时写成了 <script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js"/>不能正常解析 后改为<script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js">&lt...

class Clock extends React.Component{ constructor(props){ super(props); this.state = {date:new Date()}; } trick(){ this.setState({date:new Date()}); } compo...