MaskInput SAP SE The <code>sap.m.MaskInput</code> control allows users to easily enter data in a certain format and in a fixed-width input (for example: date, time, phone number, credit card number, currency, IP address, MAC address, and others). 1.34.0 sap.m/InputBase Defines a placeholder symbol. Shown at the position where there is no user input yet. Mask defined by its characters type (respectively, by its length). You should consider the following important facts: 1. The mask characters normally correspond to an existing rule (one rule per unique char). Characters which don't, are considered immutable characters (for example, the mask '2099', where '9' corresponds to a rule for digits, has the characters '2' and '0' as immutable). 2. Adding a rule corresponding to the <code>placeholderSymbol</code> is not recommended and would lead to an unpredictable behavior. 3. You can use the special escape character '^' called "Caret" prepending a rule character to make it immutable. Use the double escape '^^' if you want to make use of the escape character as an immutable one. A list of validation rules (one rule per mask character).