Merge pull request #23 from NickGard/add-documentation

Add documentation for isRevealingMask

Author: NickGard

README.md

@@ -181,6 +181,15 @@ An optional initial value for the mask.
 
 An optional default selection - defaults to `{start: 0, end: 0}`, placing the cursor before the first character.
 
+### `isRevealingMask` : `boolean`
+
+An optional property that, if true, progressively shows the mask as input is entered. Defaults to `false`
+
+Example:
+Given an input with a mask of '111-1111 x 111', a value of '47', and `isRevealingMask` set to `true`, then the input's value is formatted as '47'
+Given the same input but with a value of '476', then the input's value is formatted as '476-'
+Given the same input but with a value of '47 3191', then the input's value is formatted as '47_-3191 x '
+
 ## `InputMask` editing methods
 
 Editing methods will not allow the string being edited to contain invalid values according to the mask's pattern.