The webpage implements the input numeric input box and the input numeric input box.

The webpage implements the input numeric input box and the input numeric input box.

Only numbers can be entered in the input box:

<Input type = "text" name = "" id = "phoneNum" value = "" class = "mui-input" placeholder = "Enter your 11-digit mobile phone number" oninput = "'This. value = this. value. replace (/\ D/gi, "") 'maxlength = "11"/>

// When the input is triggered, the input event is judged and the value in the input box is replaced with ''if it is not a number. The maxlength attribute specifies that the maximum number of characters entered in the input box is 11 characters;
// Applicable scenarios: for example, only mobile phone numbers and QQ numbers can be entered.