HTML DOM Input Date required properties
Examples
See date fields before the form is submitted if it is a required field:
var x = document.getElementById("myDate").required;
x The output is: true
try it"
Definition and Usage
required attribute is used to set or return date fields before the form is submitted if required.
This property reflects the HTML required attributes.
Browser Support
All major browsers support the required properties, in addition to the Safari browser and Internet Explorer 9 and earlier versions of IE browser.
Note: Internet Explorer or Firefox browser does not support <input type = "date"> element.
grammar
Returns required attributes:
dateObject .required
Set the required properties:
dateObject .required=true|false
Property Value
值 | 描述 |
---|---|
true|false |
描述了 date 字段是否为表单中的必填字段。
|
technical details
return value: | Boolean value that, if the date fields are required fields in a form returns true, false otherwise |
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More examples
Examples
Set the date field in the form of required parts:
document.getElementById("myDate").required = true;
try it"
Related Pages
HTML Reference Manual: HTML <the INPUT> required Attribute
Input Date Object