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JavaScript the best RegEx for IPv4 validation with test examples
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| const ip4RegEx = /^(?:(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])(\.(?!$)|$)){4}$/ | |
| /* | |
| //valid | |
| 127.0.0.1 | |
| 192.168.1.1 | |
| 192.168.1.255 | |
| 255.255.255.255 | |
| 0.0.0.0 | |
| 1.1.1.1 | |
| //invalid | |
| 01.1.1.1 | |
| 1.01.1.1 | |
| 1.1.01.1 | |
| 1.1.1.01 | |
| 192.168.1.1. | |
| 192.168.1.1.1 | |
| 30.168.1.255.1 | |
| 127.1 | |
| 192.168.1.256 | |
| -1.2.3.4 | |
| 3...3 | |
| */ |
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