js常用的正则

 1.5位整数带两位小数
/^\d{0,5}(\.\d{0,2})?$/g

2.邮箱
/^([0-9A-Za-z\-_\.]+)@([0-9a-z]+\.[a-z]{2,3}(\.[a-z]{2})?)$/g

3.不带小数的
/^[0-9]*$/

4.数字、英文、特殊字符
/^[\w\+=_!@#%&*-]+$/

5.不含特殊字符
/^[\u4e00-\u9fa5_a-zA-Z0-9]+$/

6.数字大小写字母
/^[0-9a-zA-Z]+$/

7.只能输入中文
 /^[\u0391-\uFFE5]+$/

8.中文，英文，数字
/^[\u4e00-\u9fa5_a-zA-Z0-9]+$/

 

 

 

res(a,b,str){   //数字加英文
        let re = `\^\\w{${a},${b}}\$`
        let reg = new RegExp(re);
        let status = !reg.test(str)
        return status
    },
    res2(a,b,str){  //中英文字符
        let re = `\^[\u4e00-\u9fa5_a-zA-Z]{${a},${b}}\$`
        let reg = new RegExp(re);
        let status = !reg.test(str)
        return status
    },
    res3(a,b,str){  //中文字符
        let re = `\^[\u4e00-\u9fa5]{${a},${b}}\$`
        let reg = new RegExp(re);
        let status = !reg.test(str)
        return status
    },
    res4(a,b,str){  //数字
        let re = `\^[0-9]{${a},${b}}\$`
        let reg = new RegExp(re);
        let status = !reg.test(str)
        return status
    },
    res5(str){
        let reg = /^[0-9\-()]*$/
        let status = !reg.test(str)
        return status
    },
    res6(a,b,str){  //中英文数字字符
        let re = `\^[\u4e00-\u9fa5_a-zA-Z0-9]{${a},${b}}\$`
        let reg = new RegExp(re);
        let status = !reg.test(str)
        return status
    },