HTML | DOM Input Datetime defaultValue Property Last Updated : 21 Sep, 2022 Summarize Comments Improve Suggest changes Share Like Article Like Report The Input Datetime defaultValue property in HTML DOM is used to set or return the default value of a datetime field. This property is used to reflect the HTML value attribute. The main difference between the default value and value is that the default value indicates the default value of the property and the value contains the current value after making some changes. This property is used to find whether the DateTime field has been changed or not. Syntax: It is used to return the defaultValue property. datetimeObject.defaultValueIt is used to set the defaultValue property. datetimeObject.defaultValue = value Property Values: It contains single property value value which defines the default value for Input Datetime field. Return Value: It returns a string value which represents the default value of the Input Datetime field. Example 1: This example illustrates how to return the Input Datetime defaultValue property. HTML <!DOCTYPE html> <html> <head> <title> HTML DOM Input Datetime defaultValue Property </title> </head> <body style="text-align:center;"> <h1 style="color: green;"> GeeksforGeeks </h1> <h2 style="font-family: Impact;"> Input Datetime defaultValue Property </h2> <br> <input type="datetime" id="test_Datetime" value="2019-07-02T25:32Z" autocomplete="on"> <button ondblclick="My_Datetime()"> Check </button> <p id="test"></p> <script> function My_Datetime() { // Return the Datetime defaultValue var d = document.getElementById( "test_Datetime").defaultValue; document.getElementById("test").innerHTML = d; } </script> </body> </html> Output: Before Clicking the Button: After Clicking the Button: Example 2: This example illustrates how to return Input datetime defaultValue property. HTML <!DOCTYPE html> <html> <head> <title> HTML DOM Input Datetime defaultValue Property </title> </head> <body style="text-align:center;"> <h1 style="color: green;"> GeeksforGeeks </h1> <h2 style="font-family: Impact;"> Input Datetime defaultValue Property </h2> <br> <input type="datetime" id="test_Datetime" value="2019-07-02T25:32Z" autocomplete="on"> <button ondblclick="My_Datetime()"> Check </button> <p id="test"></p> <script> function My_Datetime() { // Set the Datetime defaultValue var d = document.getElementById( "test_Datetime").defaultValue = "2015-01-02T11:42:13.510"; document.getElementById("test").innerHTML = "The value was changed to " + d; } </script> </body> </html> Output: Before Clicking the Button: After Clicking the Button: Note: The <input type="datetime-local"> element does not show any datetime field/calendar in Firefox. Supported Browsers: The browsers supported by HTML DOM Input Datetime defaultValue Property are listed below: Google ChromeInternet ExplorerFirefoxSafariOpera Comment More infoAdvertise with us Next Article HTML DOM Input Tel defaultValue Property M manaschhabra2 Follow Improve Article Tags : Web Technologies HTML HTML-DOM HTML-Attributes Similar Reads HTML | DOM Input Date defaultValue Property The Input Date defaultValue Property in HTML DOM is used to set or return the default value of a date field. This property is used to reflect the HTML value attribute. The main difference between the default value and value is that the default value indicate the default value and the value contains 2 min read HTML DOM Input DatetimeLocal defaultValue Property The Input DatetimeLocal defaultValue property is used to set or return the default value of a local DateTime field. This property is used to reflect the HTML value attribute. 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