HTML DOM输入电子邮件自动对焦属性 _HTML文档

输入电子邮件自动对焦属性HTML DOM中的DOM用于设置或返回页面加载时输入电子邮件字段是否应获得焦点。它反映了HTML自动对焦属性。
语法如下：

它返回自动对焦属性。
emailObject.autofocus
用于设置自动对焦属性。
emailObject.autofocus = "true|false"

【HTML DOM输入电子邮件自动对焦属性】属性值：
true：设置电子邮件字段的焦点
false：为默认值。它定义了电子邮件字段没有得到关注
返回值：它返回一个布尔值, 该值表示电子邮件字段是否获得自动聚焦。
例子：本示例返回"输入电子邮件"自动聚焦属性。

< !DOCTYPE html> < html> < head> < title> HTML DOM Input Email autofocus Property < /title> < /head> < body> < h1> lsbin< /h1> < h2> DOM Input Email autofocus Propertyt< /h2> E-mail: < input type = "email" id = "email" value = "https://www.lsbin.com/careers@lsbin.org" autofocus> < button onclick = "myGeeks()"> Click Here! < /button> < p id = "GFG" style = "font-size:25px; color:green; "> < /p> < !-- Script to access input element with type email attribute --> < script> function myGeeks() { var em = document.getElementById("email").autofocus; document.getElementById("GFG").innerHTML = em; } < /script> < /body> < /html>

输出如下：
在单击按钮之前：

文章图片
单击按钮后：

文章图片
示例2：本示例设置"输入电子邮件"自动对焦属性。

< !DOCTYPE html> < html> < head> < title> HTML DOM Input Email autofocus Property < /title> < /head> < body style = "text-align:center; "> < h1> lsbin< /h1> < h2> DOM Input Email autofocus Property< /h2> E-mail: < input type = "email" id = "email" value = "https://www.lsbin.com/careers@lsbin.org" autofocus> < button onclick = "myGeeks()"> Click Here! < /button> < p id = "GFG" style = "font-size:25px; color:green; "> < /p> < !-- Script to access input element with type email attribute --> < script> function myGeeks() { var em = document.getElementById("email").autofocus = "false" document.getElementById("GFG").innerHTML = "The value of the autofocus attribute" + " was changed to " + em; } < /script> < /body> < /html>

输出：
在单击按钮之前：