JS uses regular expressions to determine IP addresses

From , 5 Years ago, written in JavaScript, viewed 131 times.

<script type="text/javascript">
var ip='20.255.255.255';
    re=/^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])$/
    r=re.test(ip);
    alert(r)
</script>

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JS uses regular expressions to determine IP addresses

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