Questions with a common and recognizable prefix can help users more quickly infer the required input type or format. The prefix should not interfere with the user’s ability to access the input. --- Icons can also be used to prefix questions, such as using the [User Interface (UI) Icon set](icons#user-interface-ui-icons) dollar sign or calendar icons. More examples can be found on the [Input with Prefix or Suffix](inputs#input-with-prefix-or-suffix) example. --- Input Masks are recommended to help users type commonly formatted types such as telephone numbers, following guidance from the U.S. Web Design System’s Input Mask. The open source library Cleave.js is included as a dependency of the {{ this.package.nice }} to provide input masking support. --- Further guidance on prefixed inputs can be found on the USWDS site.