validRate: function(val){
if(val === 100) return true
/* 0-99.99 的规则 */
let reg = /\d{1,2}(\.\d{1,2})?/
return reg.test(val)
}https://stackoverflow.com/questions/23607381/jquery-validate-regular-expression-to-get-interest-rate
原文：https://www.cnblogs.com/codebook/p/12120627.html