CREATE A TELEPHONE INPUT TYPE
You can use the telephone input type to accept into an input field telephone numbers and characters such as +, -, and a space. When a web form requires a phone number for an input field, it is relatively simple for desktop users to simply type in a phone number, but on mobile web browsers, there is no point in displaying a full-sized virtual keyboard; instead, only a numeric keypad with the telephone-related characters appears.
<input type='tel' name='field' value='telephone'>
The type='tel' attribute value activates the telephone-specific input options of the user’s web browser, if supported. Additional input element attributes, such as name and value, have the same meaning and functionality common in HTML forms. ...
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