如何在此输入中仅输入数字和减号

Question

 <div class="kinput"> <input type="text" placeholder="Enter value" maxlength="7" id="kinput" oninput="this.value = this.value.replace(/[^0-9.]/g, '').replace(/(\..*)\./g, '$1');"> </div>

I found this expression

oninput="this.value = this.value.replace(/[^0-9.]/g, '').replace(/(\..*)\./g, '$1');"

but it does not let me enter the minus sign. if there is a way I can include the minus sign without allowing the other non-numeric characters..

Answer 1

You can include the - as part of the regex ( [^0-9.-] ) to ignore that character in the matching and will skip that in the replace.

 <div class="kinput"> <input type="text" placeholder="Enter value" maxlength="7" id="kinput" oninput="this.value = this.value.replace(/[^0-9.-]/g, '').replace(/(\..*)\./g, '$1');"> </div>