Of Stack

Commonly used JS validation and function summary

  • 2020-05-07 19:16:30
  • OfStack

The following are some JS validation and functions that I usually use, and some validation that I write directly into the properties of the object, which can be called directly through the object 



// Floating-point division 

function fdiv(a, b, n) {

    if (n == undefined) { n = 2; }

    var t1 = 0, t2 = 0, r1, r2;

    try { t1 = a.toString().split(".")[1].length } catch (e) { }

    try { t2 = b.toString().split(".")[1].length } catch (e) { }

    with (Math) {

        r1 = Number(a.toString().replace(".", ""));

        r2 = Number(b.toString().replace(".", ""));

        return ((r1 / r2) * pow(10, t2 - t1)).toFixed(n);

    }

}





// Floating-point multiplication 

function fmul(a, b, n) {

    if (n == undefined) { n = 2; }

    var m = 0, s1 = a.toString(), s2 = b.toString();

    try { m += s1.split(".")[1].length } catch (e) { }

    try { m += s2.split(".")[1].length } catch (e) { }

    return (Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m)).toFixed(n);

}





// Floating-point addition 

function fadd(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2))

    return ((a * m + b * m) / m).toFixed(n);

}





// A floating-point subtraction operation 

function fsub(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2));

    // Dynamic control precision length 

    //n = (r1 >= r2) ? r1 : r2;

    return ((a * m - b * m) / m).toFixed(n);

}

Number.prototype.add = function (arg) {

    return fadd(this, arg);

}

Number.prototype.subs = function (arg) {

    return fsub(this, arg);

}

Number.prototype.mul = function (arg) {

    return fmul(this, arg);

}

Number.prototype.div = function (arg) {

    return fdiv(this, arg);

}





/// Format the number of digits, the default left fill 0, If an argument is specified 2 And parameters 2 The value of 1 Are on the right side of the cover 0

Number.prototype.FormatLen = function (len, direct) {

    var d = parseInt(direct);

    if (isNaN(d)) { d = 0; }

    var num = this.toString();

    if (num.length < len) {

        for (var i = num.length; i < len; i++) {

            if (d == 0) {

                num = "0" + num;

            }

            else {

                num += "0";

            }

        }

    }

    return num;

}





// Format decimal place , You can specify decimal places , Whether or not 4 Give up 5 The parameters such as 

Number.prototype.FormatRadix = function (len, IsRound) {

    var num = this.toString();

    var numArr = num.split('.');

    var rad = 0;

    var numpart = parseInt(numArr[0]);

    if (numArr.length >= 2) {

        if (numArr[1].length < len) {

            rad = parseInt(numArr[1]).FormatLen(len, 1);

        }

        else {

            if (numArr[1].length == len) {

                rad = numArr[1];

            }

            else {

                rad = numArr[1].substr(0, len);

                if (IsRound) {

                    var d = parseInt(numArr[1].substr(len, 1));

                    if (d >= 5) { rad += 1; if (rad.toString().length > len) { numpart += 1; rad = rad.toString().substr(1, len); } }

                }

            }
        }

    }

    else {

        rad = rad.FormatLen(len);

    }

    return numpart + "." + rad;

}





// Detects if there is the same element in the string split Is a string delimiter. If a delimiter is specified, it determines whether the delimited string is duplicated, and if not, whether a single string is duplicated 

// There is a repeat return true

String.prototype.CompareElement = function (s) {

    var str = this.toString();

    if (s == undefined) {

        for (var i = 0; i < str.length; i++) {

            for (j = i + 1; j < str.length; j++) {

                if (str.substr(i, 1) == str.substr(j, 1)) {

                    return true;

                }

            }

        }

    }

    else {

        var strArr = str.split(s);

        for (var i = 0; i < strArr.length; i++) {

            for (var j = i + 1; j < strArr.length; j++) {

                if (strArr[i] == strArr[j]) {

                    return true;

                }

            }

        }

    }

    return false;

}

String.prototype.replaceAll = function (str, tostr) {

    oStr = this;

    while (oStr.indexOf(str) > -1) {

        oStr = oStr.replace(str, tostr);

    }

    return oStr;

}

Array.prototype.CompareElement = function () {

    var strArr = this;

    for (var i = 0; i < strArr.length; i++) {

        for (var j = i + 1; j < strArr.length; j++) {

            if (strArr[i] == strArr[j]) {

                return true;

            }

        }

    }

    return false;

}





// Number of string transitions , If no delimiter is specified s, The default to , Separator separator , If the delimiter is null, each character is treated as 1 Array elements 

String.prototype.ToArray = function (s) {

    if (s == undefined) { s = ","; }

    var strArr = [];

    strArr = this.split(s);

    return strArr;

}





// will 1 Array conversion 1 , all elements are concatenated with the specified delimiter. The default delimiter is ,

Array.prototype.ToIDList = function (s) {

    if (s == undefined) { s = ","; }

    var list = "";

    for (var i = 0; i < this.length; i++) {

        list += (list == "" ? this[i] : s + "" + this[i]);

    }

    return list;

}





// Gets the location index of the specified element , Element does not exist -1

Array.prototype.GetIndex = function (s) {

    var index = -1;

    for (var i = 0; i < this.length; i++) {

        if ((s + "") == this[i]) {

            index = i;

        }

    }

    return index;

}





// Floating-point multiplication 

function fmul(a, b, n) {

    if (n == undefined) { n = 2; }

    var m = 0, s1 = a.toString(), s2 = b.toString();

    try { m += s1.split(".")[1].length } catch (e) { }

    try { m += s2.split(".")[1].length } catch (e) { }

    return (Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m)).toFixed(n);

}
0 



// Floating-point multiplication 

function fmul(a, b, n) {

    if (n == undefined) { n = 2; }

    var m = 0, s1 = a.toString(), s2 = b.toString();

    try { m += s1.split(".")[1].length } catch (e) { }

    try { m += s2.split(".")[1].length } catch (e) { }

    return (Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m)).toFixed(n);

}
1 



/// Detects if the string is made of Chinese , English , Numbers and underscores 

function chkNickName(str) {

    var pattern = /^[\w\u4e00-\u9fa5]+$/gi;

    if (pattern.test(str)) {

        return true;

    }

    return false;

}





// To determine the length of the ( The length is not limited to 0)

String.prototype.IsLen = function () {

    var isRightFormat = false;

    var minnum = arguments[0] ? arguments[0] : 0;

    var maxnum = arguments[1] ? arguments[1] : 0;

    isRightFormat = (minnum == 0 && maxnum == 0 ? true : (calculate_byte(this) >= minnum && calculate_byte(this) <= maxnum ? true : false));

    return isRightFormat;

}





// Floating-point multiplication 

function fmul(a, b, n) {

    if (n == undefined) { n = 2; }

    var m = 0, s1 = a.toString(), s2 = b.toString();

    try { m += s1.split(".")[1].length } catch (e) { }

    try { m += s2.split(".")[1].length } catch (e) { }

    return (Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m)).toFixed(n);

}
4 



// Floating-point multiplication 

function fmul(a, b, n) {

    if (n == undefined) { n = 2; }

    var m = 0, s1 = a.toString(), s2 = b.toString();

    try { m += s1.split(".")[1].length } catch (e) { }

    try { m += s2.split(".")[1].length } catch (e) { }

    return (Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m)).toFixed(n);

}
5 



// Floating-point multiplication 

function fmul(a, b, n) {

    if (n == undefined) { n = 2; }

    var m = 0, s1 = a.toString(), s2 = b.toString();

    try { m += s1.split(".")[1].length } catch (e) { }

    try { m += s2.split(".")[1].length } catch (e) { }

    return (Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m)).toFixed(n);

}
6 



// Floating-point multiplication 

function fmul(a, b, n) {

    if (n == undefined) { n = 2; }

    var m = 0, s1 = a.toString(), s2 = b.toString();

    try { m += s1.split(".")[1].length } catch (e) { }

    try { m += s2.split(".")[1].length } catch (e) { }

    return (Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m)).toFixed(n);

}
7 



// Floating-point multiplication 

function fmul(a, b, n) {

    if (n == undefined) { n = 2; }

    var m = 0, s1 = a.toString(), s2 = b.toString();

    try { m += s1.split(".")[1].length } catch (e) { }

    try { m += s2.split(".")[1].length } catch (e) { }

    return (Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m)).toFixed(n);

}
8 



// Floating-point multiplication 

function fmul(a, b, n) {

    if (n == undefined) { n = 2; }

    var m = 0, s1 = a.toString(), s2 = b.toString();

    try { m += s1.split(".")[1].length } catch (e) { }

    try { m += s2.split(".")[1].length } catch (e) { }

    return (Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m)).toFixed(n);

}
9 



// Floating-point addition 

function fadd(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2))

    return ((a * m + b * m) / m).toFixed(n);

}
0 



// validation QQ number 

String.prototype.IsQQ = function () {

    var myReg = /^[1-9]\d{4,10}$/;

    if (myReg.test(this)) return true;

    return false;

}





// Verify the url 

String.prototype.IsHttpUrl = function () {

    var myReg = /^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/;

    if (myReg.test(this)) return true;

    return false;

}





// To verify the domain name 

String.prototype.IsDoMainName = function () {

    var myReg = /^[0-9a-zA-Z]([0-9a-zA-Z\-]+\.){1,3}[a-zA-Z]{2,4}?$/;

    if (myReg.test(this)) return true;

    return false;

}





// validation IPV4 address 

String.prototype.IsIpv4 = function () {

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

    if (myReg.test(this)) return true;

    return false;

}





// Verify image address ( Does not support the CGI Dynamically generated images )

String.prototype.IsImgURL = function () {

    var myReg = /^\.(jpeg|jpg|gif|bmp|png|pcx|tiff|tga|lwf)$/;

    if (myReg.test(this)) return true;

    return false;

}





// Verify phone number 

String.prototype.IsCellPhone = function () {

    var myReg = /^((\(\d{3}\))|(\d{3}\-))?1[3,5]\d{9}$/;

    if (myReg.test(this)) return true;

    return false;

}





// Floating-point addition 

function fadd(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2))

    return ((a * m + b * m) / m).toFixed(n);

}
7 



// Floating-point addition 

function fadd(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2))

    return ((a * m + b * m) / m).toFixed(n);

}
8 



// Verification of id card number 

String.prototype.IsIdCard = function () {

    var myReg = /(^([\d]{15}|[\d]{18}|[\d]{17}[xX]{1})$)/;

    if (myReg.test(this)) return true;

    return false;

}





// A floating-point subtraction operation 

function fsub(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2));

    // Dynamic control precision length 

    //n = (r1 >= r2) ? r1 : r2;

    return ((a * m - b * m) / m).toFixed(n);

}

Number.prototype.add = function (arg) {

    return fadd(this, arg);

}

Number.prototype.subs = function (arg) {

    return fsub(this, arg);

}

Number.prototype.mul = function (arg) {

    return fmul(this, arg);

}

Number.prototype.div = function (arg) {

    return fdiv(this, arg);

}
0 



// A floating-point subtraction operation 

function fsub(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2));

    // Dynamic control precision length 

    //n = (r1 >= r2) ? r1 : r2;

    return ((a * m - b * m) / m).toFixed(n);

}

Number.prototype.add = function (arg) {

    return fadd(this, arg);

}

Number.prototype.subs = function (arg) {

    return fsub(this, arg);

}

Number.prototype.mul = function (arg) {

    return fmul(this, arg);

}

Number.prototype.div = function (arg) {

    return fdiv(this, arg);

}
1 



// A floating-point subtraction operation 

function fsub(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2));

    // Dynamic control precision length 

    //n = (r1 >= r2) ? r1 : r2;

    return ((a * m - b * m) / m).toFixed(n);

}

Number.prototype.add = function (arg) {

    return fadd(this, arg);

}

Number.prototype.subs = function (arg) {

    return fsub(this, arg);

}

Number.prototype.mul = function (arg) {

    return fmul(this, arg);

}

Number.prototype.div = function (arg) {

    return fdiv(this, arg);

}
2 



// A floating-point subtraction operation 

function fsub(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2));

    // Dynamic control precision length 

    //n = (r1 >= r2) ? r1 : r2;

    return ((a * m - b * m) / m).toFixed(n);

}

Number.prototype.add = function (arg) {

    return fadd(this, arg);

}

Number.prototype.subs = function (arg) {

    return fsub(this, arg);

}

Number.prototype.mul = function (arg) {

    return fmul(this, arg);

}

Number.prototype.div = function (arg) {

    return fdiv(this, arg);

}
3 



// A floating-point subtraction operation 

function fsub(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2));

    // Dynamic control precision length 

    //n = (r1 >= r2) ? r1 : r2;

    return ((a * m - b * m) / m).toFixed(n);

}

Number.prototype.add = function (arg) {

    return fadd(this, arg);

}

Number.prototype.subs = function (arg) {

    return fsub(this, arg);

}

Number.prototype.mul = function (arg) {

    return fmul(this, arg);

}

Number.prototype.div = function (arg) {

    return fdiv(this, arg);

}
4 



// A floating-point subtraction operation 

function fsub(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2));

    // Dynamic control precision length 

    //n = (r1 >= r2) ? r1 : r2;

    return ((a * m - b * m) / m).toFixed(n);

}

Number.prototype.add = function (arg) {

    return fadd(this, arg);

}

Number.prototype.subs = function (arg) {

    return fsub(this, arg);

}

Number.prototype.mul = function (arg) {

    return fmul(this, arg);

}

Number.prototype.div = function (arg) {

    return fdiv(this, arg);

}
5 



// A floating-point subtraction operation 

function fsub(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2));

    // Dynamic control precision length 

    //n = (r1 >= r2) ? r1 : r2;

    return ((a * m - b * m) / m).toFixed(n);

}

Number.prototype.add = function (arg) {

    return fadd(this, arg);

}

Number.prototype.subs = function (arg) {

    return fsub(this, arg);

}

Number.prototype.mul = function (arg) {

    return fmul(this, arg);

}

Number.prototype.div = function (arg) {

    return fdiv(this, arg);

}
6 



// A floating-point subtraction operation 

function fsub(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2));

    // Dynamic control precision length 

    //n = (r1 >= r2) ? r1 : r2;

    return ((a * m - b * m) / m).toFixed(n);

}

Number.prototype.add = function (arg) {

    return fadd(this, arg);

}

Number.prototype.subs = function (arg) {

    return fsub(this, arg);

}

Number.prototype.mul = function (arg) {

    return fmul(this, arg);

}

Number.prototype.div = function (arg) {

    return fdiv(this, arg);

}
7 



// A floating-point subtraction operation 

function fsub(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2));

    // Dynamic control precision length 

    //n = (r1 >= r2) ? r1 : r2;

    return ((a * m - b * m) / m).toFixed(n);

}

Number.prototype.add = function (arg) {

    return fadd(this, arg);

}

Number.prototype.subs = function (arg) {

    return fsub(this, arg);

}

Number.prototype.mul = function (arg) {

    return fmul(this, arg);

}

Number.prototype.div = function (arg) {

    return fdiv(this, arg);

}
8 



// A floating-point subtraction operation 

function fsub(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2));

    // Dynamic control precision length 

    //n = (r1 >= r2) ? r1 : r2;

    return ((a * m - b * m) / m).toFixed(n);

}

Number.prototype.add = function (arg) {

    return fadd(this, arg);

}

Number.prototype.subs = function (arg) {

    return fsub(this, arg);

}

Number.prototype.mul = function (arg) {

    return fmul(this, arg);

}

Number.prototype.div = function (arg) {

    return fdiv(this, arg);

}
9

The code is very simple, simple, but the function is very practical, there is a need for a friend reference

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