HTML DOM Input Datetime required properties
Examples
See datetime fields before submitting the form if required fields:
var x = document.getElementById("myDatetime").required;
x The output is: true
try it"
Definition and Usage
required property sets or returns datetime fields in the form if a required field.
This property reflects the HTML required attributes.
Browser Support
All major browsers support the required properties, in addition to Internet Explorer 9 and earlier versions of IE, Safari browser.
Note: Internet Explorer, Firefox, Opera 15 ( and higher) or Chrome supports the <input> element using type = "datetime".
grammar
Returns required attributes:
datetimeObject .required
Set the required properties:
datetimeObject .required=true|false
Property Value
| 值 | 描述 |
|---|---|
| true|false |
描述了 datetime 字段在表单提交前是否为必填部分。
|
technical details
| return value: | Boolean value that, if the datetime fields are required parts of the form back to true, otherwise false. |
|---|
More examples
Examples
Datetime field is set for the form of required parts:
document.getElementById("myDatetime").required = true;
try it"
Related Pages
HTML Reference Manual: HTML <the INPUT> required Attribute
Input Datetime Object