Javascript 如何使正则表达式匹配大小写？
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How can I make a regular expression match upper and lower case?
提问by SoulieBaby
I don't really know much about regex at all, but if someone could help me change the following code to also allow for lowercase a-z, that would be great!
我对正则表达式一无所知，但如果有人能帮我更改以下代码以允许小写 az，那就太好了！
$("input.code").keyup(function(){
this.value = this.value.match(/[A-Z]{3}([0-9]{1,4})?|[A-Z]{1,3}/)[0];
});
回答by cheeken
回答by Benjamin Udink ten Cate
/[A-Za-z]{3}([0-9]{1,4})?|[A-Za-z]{1,3}/
[]denotes a character class and A-Zis a allowed range and means ABCDEFGHIJKLMNOPQRSTUVWXYZ. You can extend this easy by adding a-z
[]表示一个字符类，A-Z是一个允许的范围，表示 ABCDEFGHIJKLMNOPQRSTUVWXYZ。您可以通过添加来轻松扩展a-z
