HTML 输入框 checked 属性
htmlweb developmentfront end technology更新于 2026/1/24 19:24:17
<input> 元素的 checked 属性指定在网页加载时选中复选框。您也可以将此属性与单选按钮一起使用。
以下是语法 −
<input type=”checkbox” checked>
上面，我们将其设置为 checked，因为我们希望复选框在网页加载时处于选中状态。
现在让我们看一个实现 <input> 元素 checked 属性的示例 −
示例
<!DOCTYPE html> <html> <body> <h2>Register</h2> <form action = "" method = "get"> Id: <input type = "text" name = "id" placeholder = "Enter UserId here..." size = "25"><br> Password: <input type = "password" name = "pwd" placeholder = "Enter password here..."><br> DOB: <input type = "date" name = "dob" placeholder = "Enter date of birth here..."><br> Telephone: <input type = "tel" name = "tel" placeholder = "Enter mobile number here..."><br> Email: <input type = "email" name = "email" placeholder = "Enter email here..." size = "35"><br><br> <input type = "checkbox" name = "vehicle" value = "Bike" checked>Newsletter Subscription: <br> <button type = "submit" value = "Submit">Submit</button> </form> </body> </html>
输出
在上面的例子中，我们有一个带有按钮的表单 −
<form action = "" method = "get"> Id: <input type = "text" name = "id" placeholder = "Enter UserId here..." size = "25"><br> Password: <input type = "password" name = "pwd" placeholder = "Enter password here..."><br> DOB: <input type = "date" name = "dob" placeholder = "Enter date of birth here..."><br> Telephone: <input type = "tel" name = "tel" placeholder = "Enter mobile number here..."><br> Email: <input type = "email" name = "email" placeholder = "Enter email here..." size = "35"><br><br> <input type = "checkbox" name = "vehicle" value = "Bike" checked>Newsletter Subscription: <br> <button type = "submit" value = "Submit">Submit</button> </form>
此外，我们还设置了一个复选框 −
<input type="checkbox" name="vehicle" value="Bike" checked>Newsletter Subscription:
如上所示，我们设置了 checked 属性，以便输入类型复选框在页面加载时保持选中状态。
相关文章
有用资源
html 参考教程 - 该教程包含有关 html 的更多信息:https://www.cainiaomax.com/html/
