let reg = /(^[1-9](\d+)?(\.\d{1,2})?$)|(^[1-9]$)|(^\d\.[1-9]{1,2}$)|(^\d\.[0]{1}[1-9]{1}$|(^\d\.[1-9]{1}[0]{1}$)$)/;
let num = 0.01;
if (reg.exec(num)) {
console.log(‘验证通过‘);
} else {
console.log(‘验证失败‘);
}原文：https://www.cnblogs.com/shaozhu520/p/12123129.html