Allow Only Number In HTML Text Box - jQuery numericInput.js | Free jQuery Plugins
Consider Using Localized Input Masks for 'Phone' and Other Restricted Inputs (64% Aren't Taking Advantage of Input Masking) – Articles – Baymard Institute
How to Use Input Mask in Your Contact Form (Examples) - Ninja Forms
Consider Using Localized Input Masks for 'Phone' and Other Restricted Inputs (64% Aren't Taking Advantage of Input Masking) – Articles – Baymard Institute
How to Validate Phone Number using jQuery Input Mask Plugin ? - GeeksforGeeks