How to set validation mask Angular 2? -


i tried set validation mask using library:

https://github.com/text-mask/text-mask/blob/master/componentdocumentation.md#readme

validation mask is:

public phone_mask = ['+', '(', '9', '9', '4', ')', ' ', /(50|51|55|70|77)/, /[0-9]/ , '-', /\d/, /\d/, /\d/, '-', /\d/, /\d/, '-', /\d/, /\d/];

this patters not work: /(50|51|55|70|77)/

this pattern allows enter numbers, need 50|51|55|70|77


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