Input mask, also known as a mask or format string, is a way of defining a set of rules to be used for data entry in a computer system. It is used to control, restrict, and validate the type, format, and range of data entered into a field. An input mask can also be used to display a consistent pattern of characters used to enter data into a field.
Input masks are used to control and limit the type of information that users enter into a computer field. These rules help to ensure the integrity and accuracy of data entered. For example, an input mask could be used to restrict data entered in a field that expects numbers to only allow digits of a certain length or with certain decimal places. This helps protect the fields from accidentally entering wrong data and helps streamline the data entry process.
Input masks are also useful for aesthetics since they can add a visual hint to a field as to when data should be entered or how it should be formatted. This can provide guidance to a user on how to complete a field correctly.
Input masks can be implemented in various ways depending on the software or component used. Common implementations include regular expressions, HTML5 input type attributes, and formatting libraries.
Input masks can be used in many fields, such as email addresses, phone numbers, credit card numbers, and postal codes. They are used to ensure data accuracy and create a consistent format for data being stored.
In summary, input masks are used to define and validate specific data formats in computer systems. They can help to streamline data entry by providing guidance on data entry, protect fields from incorrect data, and add to the aesthetic of a website.
