submit事件是在表单而不是输入上激发的。 因此,您需要在<section>中放置一个表单,并将处理程序绑定到该表单。然后您需要使用$("#name").val()来获取输入的值。 $(function() { $("#myform") .on("submit", function(e) { e.preventDefault(); var namenew = $("#name").val(); $("p.show")...
<form id="form"method="get">First name:<input type="text"value="Jake"name="fname">Last name:<input type="text"value="Ma"name="lname"><input type="submit"value="提交"></form> 当我们使用表单 form 元素时,内部的表单元素可以根据name属性与value值自动组合成一个完整的序列化表单对象。我们...
在 React 应用中，我们经常需要根据用户的点击事件来执行相应的操作。在某些情况下，我们需要获取用户点击...
functionMyForm(){return(<form><label>Enter your name:<inputtype="text"/></label></form>)}constroot=ReactDOM.createRoot(document.getElementById('root'));root.render(<MyForm/>); Run Example » This will work as normal, the form will submit and the page will refresh. ...
functionChangeName({currentName, onUpdateName}){const[optimisticName, setOptimisticName]=useOptimistic(currentName);constsubmitAction=asyncformData=>{const newName = formData.get("name");setOptimisticName(newName);const updatedName =awaitupdateName(newName);onUpdateName(updatedName);};return(<form ...
}, [counter])// 登录functionhandleSubmit() {// form 是 FormInstance。// getFieldsValue - 获取一组字段名对应的值,会按照对应结构返回constformData = form.getFieldsValue();// 如果显示了“验证码”却没有输入,提示if(codeVisible && !formData.captcha)returnmessage.error('请输入验证码');// 登录...
<form actinotallow={handleSubmit} /> 1. 注意,如果在 React 18 中添加<form action>属性,就会收到警告: ⚠️ Warning: Invalid value for prop action on <form> tag. Either remove it from the element or pass a string or number value to keep it in the DOM. ...
<button onClick={this.handleClick} type="submit">新增</button> </div> </div>) } } 在UserListContainer中添加onAddUser参数与函数: import React, { Component } from 'react'import UserList from'./UserList'exportdefaultclass UserListContainer extends Component { ...
npm install react-hook-form Quickstart import{useForm}from'react-hook-form';functionApp(){const{register,handleSubmit,formState:{errors},}=useForm();return(<formonSubmit={handleSubmit((data)=>console.log(data))}><input{...register('firstName')}/><input{...register('lastName',{required:...
```jsxconstUncontrolledForm = () => {constinputRef = React.createRef();consthandleSubmit = (event) => {event.preventDefault();alert(inputRef.current.value);};return(<form onSubmit={handleSubmit}><input type="text"ref={inputRef}...