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lxl
2022-09-16 cb746cca26fa024018d7ce772ba6a96557ea768b
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$.validator.addMethod("ipv4", function(value, element) {
    return this.optional(element) || /^(25[0-5]|2[0-4]\d|[01]?\d\d?)\.(25[0-5]|2[0-4]\d|[01]?\d\d?)\.(25[0-5]|2[0-4]\d|[01]?\d\d?)\.(25[0-5]|2[0-4]\d|[01]?\d\d?)$/i.test(value);
}, "Please enter a valid IP v4 address.");