Js之正则表达式请使用字母 数字和特殊符号组合 8-20个字符

参考：

javascript - Regex for password must contain at least eight characters, at least one number and both lower and uppercase letters and special characters - Stack Overflow

实际：

At least 8 characters long;At most 20characters long;One lowercase / one uppercase, one number and one special character;No whitespaces.

'^(?=.*[0-9])(?=.*[a-zA-Z])(?=.*[@$!%*?&^#~])([a-zA-Z0-9@$!%*?&^#~]{8,20})$'

附：

正则表达式去除字符串中的中文：

replace(/[^a-z\d\s]+/gi, '')