Input Email maxLength 属性

定义和用法

maxLength 属性设置或返回电子邮件字段的 maxlength 属性的值。

HTML maxLength 属性规定电子邮件字段中允许的最大字符数。

默认值为 524288。

提示:如需设置或返回电子邮件字段的宽度(以字符数表示),请使用 size 属性

另请参阅:

HTML 参考手册:HTML <input> maxlength property

实例

例子 1

获取特定电子邮件字段中允许的最大字符数:

var x = document.getElementById("myEmail").maxLength;

亲自试一试

例子 2

设置电子邮件字段中允许的最大字符数:

document.getElementById("myEmail").maxLength = "8";

亲自试一试

语法

返回 maxLength 属性:

emailObject.maxLength

设置 maxLength 属性:

emailObject.maxLength = number

属性值

Value Description
number Specifies the maximum number of characters allowed in the email field. The default value is 524288.

Technical details

Return value: Value, indicating the maximum number of characters allowed in the email field.

Browser support

The numbers in the table indicate the first browser version that fully supports this property.

Chrome Edge Firefox Safari Opera
Chrome Edge Firefox Safari Opera
Support 10.0 Support Support Support