1_非受控组件

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>1_非受控组件</title>
</head>
<body>
  <!-- 准备好一个“容器” -->
  <div id="test"></div>

  <!-- 引入react核心库 -->
  <script type="text/javascript" src="../js/react.development.js"></script>
  <!-- 引入react-dom，用于支持react操作DOM -->
  <script type="text/javascript" src="../js/react-dom.development.js"></script>
  <!-- 引入babel，用于将jsx转为js -->
  <script type="text/javascript" src="../js/babel.min.js"></script>

  <script type="text/babel">
    //创建组件
    class Login extends React.Component{
      handleSubmit = (event)=>{
        event.preventDefault() //阻止表单提交
        const {username,password} = this
        alert(`你输入的用户名是：${username.value},你输入的密码是：${password.value}`)
      }
      render(){
        return(
          <form onSubmit={this.handleSubmit}>
            用户名：<input ref={c => this.username = c} type="text" name="username"/>
            密码：<input ref={c => this.password = c} type="password" name="password"/>
            <button>登录</button>
          </form>
        )
      }
    }
    //渲染组件
    ReactDOM.render(<Login/>,document.getElementById('test'))
  </script>
</body>
</html>

reactjs中收集表单数据：非受控组件和受控组件_html

2_受控组件

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>2_受控组件</title>
</head>
<body>
  <!-- 准备好一个“容器” -->
  <div id="test"></div>

  <!-- 引入react核心库 -->
  <script type="text/javascript" src="../js/react.development.js"></script>
  <!-- 引入react-dom，用于支持react操作DOM -->
  <script type="text/javascript" src="../js/react-dom.development.js"></script>
  <!-- 引入babel，用于将jsx转为js -->
  <script type="text/javascript" src="../js/babel.min.js"></script>

  <script type="text/babel">
    //创建组件
    class Login extends React.Component{

      //初始化状态
      state = {
        username:'', //用户名
        password:'' //密码
      }

      //保存用户名到状态中
      saveUsername = (event)=>{
        this.setState({username:event.target.value})
      }

      //保存密码到状态中
      savePassword = (event)=>{
        this.setState({password:event.target.value})
      }

      //表单提交的回调
      handleSubmit = (event)=>{
        event.preventDefault() //阻止表单提交
        const {username,password} = this.state
        alert(`你输入的用户名是：${username},你输入的密码是：${password}`)
      }

      render(){
        return(
          <form onSubmit={this.handleSubmit}>
            用户名：<input onChange={this.saveUsername} type="text" name="username"/>
            密码：<input onChange={this.savePassword} type="password" name="password"/>
            <button>登录</button>
          </form>
        )
      }
    }
    //渲染组件
    ReactDOM.render(<Login/>,document.getElementById('test'))
  </script>
</body>
</html>

reactjs中收集表单数据：非受控组件和受控组件_javascript_02