Regular expressions commonly used in e-commerce background

such as: Price, 0-999999.99, modify d{0,5}, can change the whole digit limit

var re =/(^0$) | (^[1-9]\d{0,5} (\.\d{1,2})? $) | (^ (0\.\d[1-9])? $) | (^ (0\. [1-9])? $)/;

Shipping cost: 0.01-99999999.99

var re =/(^[1-9]\d{0,7} (\.\d{1,2})? $) | (^ (0\.\d[1-9])? $) | (^ (0\. [1-9])? $)/;

Pure number, unlimited number of digits

var re =/^[0-9]*$/

Sort by: 0-99999999 numbers

var re =/^\d{0,8}$/

Validation: value is the data

if (!re.test (value)) {
Return "error message";
}

Regular expressions commonly used in e-commerce background