Web-side implementation input digital input box

Implementing input input boxes can only enter the effect of numbers:

 <  input  type  = "text"   name  = ""   ID  = "Phonenum"   = ""   class  = "Mui-input"   placeholder  = "Please enter your 11-digit phone number"   Oninput  = ' This.value=this.value.replace (/\d/gi, "") '  maxlength  = "one"  /> 
 
//When input event is triggered, then the value in the input box is judged, and if the number is not replaced with ', The MaxLength property specifies that the input box has a maximum of 11 characters, and the 
//scenario is: For example, you can only enter the phone number, QQ number and so on. 

Web-side implementation input digital input box