正则表达式对username进行检查-The idle Process

正则表达式对username进行检查

互联网上到处都在使用用户名。它们为用户在他们最喜欢的网站上提供了独特的身份。

您需要检查数据库中的所有用户名。以下是用户在创建用户名时必须遵循的一些简单规则。

1. 用户名只能使用字母数字字符。

2. 用户名中唯一的数字必须在末尾。最后可以有零个或多个。用户名不能以数字开头。

3. 用户名字母可以是小写和大写。

4. 用户名必须至少有两个字符长。两个字符的用户名只能使用字母作为字符。

let username = "JackOfAllTrades"; const userCheck = /^[a-z]([0-9]{2,}|[a-z]+\d*)$/i; let result = userCheck.test(username);

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clear元素清除浮动float

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The idle Process

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