How to Handle Date Input Field Formatting in NetSuite HTML Forms

NetSuite HTML input type="date" fields consistently accept and store values in the "yyyy-mm-dd" format internally. While the displayed format for these fields is determined by the user's browser or operating system locale, the underlying value remains "yyyy-mm-dd". Developers should note this internal format when writing code that sets or retrieves values from these fields. Modern browsers, including Chrome, generally ignore the placeholder attribute for input type="date" fields. Therefore, attempting to set a custom placeholder for input type="date" will not yield the desired visual result. Consider the following examples:

<input type"date" placeholder"whatever"/>

This will not display "whatever" as a placeholder in modern browsers; the placeholder attribute is ignored.

<input type"text" placeholder"whatever"/>

This will display "whatever" as a placeholder. To ensure a consistent user experience with custom placeholder text or to enforce a specific display format across all major browsers, the recommended approach is to use input type="text" instead of input type="date". This allows for full control over the displayed text and placeholder, though it requires custom JavaScript to handle date validation and formatting for the input value.