英文:
Validating prices use regular expressions
问题
我正在尝试在Vue中使用正则表达式验证输入，但我不知道如何编写正则表达式，也找不到在线上匹配我想要做的内容的方法。
我想验证的是价格，应该是带有两位小数的浮点数，小数点前可以是1个数字或9个数字。例如：
0.50
1.00
99999.99
999999999.00
我尝试了这个正则表达式：
v => (/\d{1,3}(?:[.,]\d{3})*(?:[.,]\d{2})/.test(v))
但不起作用。
抱歉，如果我的英文不是很好。我感谢您的帮助！
英文:
I'm trying to validate an input with regEx in Vue, which I don't have any idea how to make one and couldn't find online how to match what I want to do.
The thing is I'm trying to validate a price that should be a float with 2 decimal numbers, and it can be 1 number before the . or 9 digits. For example:
0.50
1.00
99999.99
999999999.00
I tried this:
v => (/\d{1,3}(?:[.,]\d{3})*(?:[.,]\d{2})/.test(v))
But doesn't work.
Sorry if my english is not very good. I appreciate the help!
答案1
得分: 2
^\d{1,9}.\d{1,2}$
查看 regex101 演示。
英文:
To match 1-9 digits before the dot, and 2 decimal numbers:
^\d{1,9}\.\d{1,2}$
See a regex101 demo.
答案2
得分: 1
请检查匹配整数部分从0到999999999的值，小数点后不超过2位的数字。以下是一个假设整个字符串从开头（^）到结尾（$）进行检查的模板，它包括：
-
必需的初始部分，要么是0，要么包含1到9位数字，并且不以"0"开头；
-
可选的以"."和两位数字结尾：
^([1-9]\d{0,8}|0)(.\d{1,2})?$
英文:
What do you want? Check the value for matching a number from 0 to 999999999 in the integer part and no more than 2 numbers after "."?
A template assuming that the entire string being checked from the beginning (^) to the end ($) consists of
-
mandatory initial part, which is either 0 or contains from 1 to 9 digits, and does not start with "0" ;
-
optional ending of "." and two digits:
^([1-9]\d{0,8}|0)(.\d{1,2})?$
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