/ maskitoWithPlaceholder helps to show placeholder mask characters. The placeholder character represents the fillable spot in the mask. 
This example is the simplest demonstration how to create masked input with placeholder .
The only required prerequisite is basic understanding of "Mask expression" concept.
 The following example explains return type of maskitoWithPlaceholder utility — an object which partially implements MaskitoOptions interface. It contains its own  processor and postprocessor  and  plugins  to keep caret from getting into placeholder part of the value. 
 Also, this complex example uses built-in postprocessor  maskitoPrefixPostprocessorGenerator  from @maskito/kit . 
maskitoWithPlaceholder with any built-in mask from @maskito/kit .