Update API.md

Add note about xregexp
2016-12-29 15:11:36 -08:00 · 2016-12-29 15:11:36 -08:00 · f395839e2c
parent 73dd46b5e3
commit f395839e2c
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--- a/API.md
+++ b/API.md
@ -659,6 +659,8 @@ Formsy.addValidationRule('isMoreThan', function (values, value, otherField) {
 ```
 Returns true if the value is thruthful

+_For more complicated regular expressions (emoji, international characters) you can use [xregexp](https://github.com/slevithan/xregexp). See [this comment](https://github.com/christianalfoni/formsy-react/issues/407#issuecomment-266306783) for an example._
+
 **isEmail**
 ```jsx
 <MyInputComponent name="foo" validations="isEmail"/>