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eddieeddieeddiejones / RegExp-demo Public

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RegExp-demo

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09_书_正则表达式必知必会_04_匹配数字0-254.html

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21 lines (20 loc) · 318 Bytes

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RegExp-demo

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09_书_正则表达式必知必会_04_匹配数字0-254.html

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21 lines (20 loc) · 318 Bytes

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<!DOCTYPE html>

<html lang="en">

<head>

<meta charset="utf-8">

</head>

<body>

<script>

// 1位或者2位数字

// 0 12 2 34

[1-9]?\d // 贪婪匹配

0-254

254 251

249 241

178

23

0 1

25[0-4]|24\d|1\d{2}|[1-9]?\d

</script>

</body>

</html>

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