checkClick (state,payload) { payload = !payload }

This function takes in a state and a payload, which is expected to be a boolean value. It then negates the value of the payload (i.e. if it was true, it becomes false, and vice versa) and assigns the new value to the payload variable. However, this function does not modify the state in any way.

To modify the state, you would need to use the Vue.js mutation syntax, such as:

mutations: {
  setClick(state, newValue) {
    state.clicked = newValue
  }
}

And then call the mutation from your component using:

this.$store.commit('setClick', !this.clicked)

This would toggle the `clicked` value in the `state` object.

相关问题

<div class="container"> <h1 style="text-align: center">欢迎使用记账本系统</h1> <form class="login-form" action="loginServlet" method="post" id="loginForm" name="myform" onsubmit="return checkclick()"> <table align="center" border="1px" bgcolor="white" width="400px" height="300px"> <tr> <td height="55px" colspan="2" style="text-align: center"><strong>用户登录</strong></td> </tr> <tr> <td align="center" width="70%" height="55px" colspan="2"><input id="user" type="text" name="username" placeholder="请输入用户名"/></td> </tr> <tr> <td align="center" width="70%" height="55px" colspan="2"><input id="pass" type="password" name="userpwd" placeholder="请输入密码"/></td> </tr> <tr> <td align="center" colspan="2" width="200px" height="60px"><img src="${pageContext.request.contextPath }/codeServlet" onclick="this.src='${pageContext.request.contextPath }/codeServlet?'+Math.random();" /></td> </tr> <tr> <td align="center" height="55px" colspan="2"> <input id="code" type="text" name="code" placeholder="验证码"/></td> </tr> <tr> <td colspan="2" height="20px" align="right"> <span id="message" style="align:center;color:red;font-size:15px;"></span></td> </tr> <tr> <td width="200px" height="55px" align="center" ><input id="checkbtn" type="submit" value="登录" ></td> <td height="55px" align="center" > <input type="button" value="注册" onClick="window.location.href='zhuce.jsp'"></td> </tr> </table> </form> </div>

这是一个登录界面的 HTML 代码，其中包含一个表单，表单中有用户名、密码、验证码等输入框和登录、注册按钮。登录按钮的点击事件会向服务器发送登录请求，注册按钮的点击事件则会跳转到注册页面。在样式上，页面使用了表格来布局，表格的中心位置放置了登录表单。

需要注意的是，该代码中使用了 JSP 内置对象 `pageContext`，其中的 `${pageContext.request.contextPath }` 表示获取当前应用的根路径。该路径将在登录界面中获取验证码的 Servlet 中使用。