JQery helper methods

In this post I am gonna give you some of the JQuery helper methods which I am using in my application frequently. Below are some of them , with explanation:

Usage:

Copy all the codes given at the end of this post to a js  file and add a reference of it to your page.
Or Click here to download the file


1. Remove Special Characters from a string:
var str="Hello%how%are$you";
str.removeSplChars();
output: Hellohowareyou

2. Trim from left:
var str="%hello";
str.trimStart('%');
Output: hello

3. Trim from right:
var str="hello%";
str.trimEnd('%');
Output: hello

4. String Contains:
var str="welcome to SPShell. The SharePoint blog";
str.contains("SharePoint");
Output: true

5. IsUndefined.
var undefinedVar;
IsUndefined(undefinedVar);
Output: true

6. isIEBrowser (check is browser is IE)

isIEBrowser();
Output: false (my browser is chrome when I excecuted this code) .

7. checkChrome
checkChrome();
 Output: true(my browser is chrome when I excecuted this code) .

8. getQueryStrings

Now here my URL was: http://stackoverflow.com/search?q=sharepoint&state=active&live=true
getQueryStrings();
Output : (a javascript object)
                {q: "sharepoint", state: "active", live: "true"}

9. IsValidEmail
IsValidEmail("vikas@live.com");
 Output: true.

Here is the Source Code (js):
You can also download this code here.
String.prototype.removeSplChars = function () {
    return this.replace(/[^a-zA-Z0-9 ]/g, "");
};
String.prototype.trimStart = function (c) {
    if (this.length == 0)
        return this;
    c = c ? c : ' ';
    var i = 0;
    var val = 0;
    for (; this.charAt(i) == c && i < this.length; i++);
    return this.substring(i);
}
String.prototype.trimEnd = function (c) {
    c = c ? c : ' ';
    var i = this.length - 1;
    for (; i >= 0 && this.charAt(i) == c; i--);
    return this.substring(0, i + 1);
}
String.prototype.contains = function(it) { return this.indexOf(it) != -1; };
function IsUndefined(value) {
    if (typeof value == 'undefined') {
        return true;
    }
    else if (value == null) {
        return true;
    }
    else return false;
}
function getInternetExplorerVersion() {
    var rv = -1;
    if (navigator.appName == 'Microsoft Internet Explorer') {
        var ua = navigator.userAgent;
        var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
        if (re.exec(ua) != null)
            rv = parseFloat(RegExp.$1);
    }
    else if (navigator.appName == 'Netscape') {
        var ua = navigator.userAgent;
        var re = new RegExp("Trident/.*rv:([0-9]{1,}[\.0-9]{0,})");
        if (re.exec(ua) != null)
            rv = parseFloat(RegExp.$1);
    }
    return rv;
}
function isIEBrowser() {
    if (getInternetExplorerVersion() > -1) {
        return true;
    }
    else return false;
}
function checkChrome() {
    var isChromium = window.chrome,
    vendorName = window.navigator.vendor;
    if (isChromium !== null && isChromium !== undefined && vendorName === "Google Inc.")
        return true;    // is chrome
    else       // not  chrome
        return false;
}
function getQueryStrings() {
    var assoc = {};
    var decode = function (s) { return decodeURIComponent(s.replace(/\+/g, " ")); };
    var queryString = location.search.substring(1);
    var keyValues = queryString.split('&');
    for (var i in keyValues) {
        var key = keyValues[i].split('=');
        if (key.length > 1) {
            assoc[decode(key[0])] = decode(key[1]);
        }
    }
    return assoc;
}
function IsValidEmail(email) {
    if (!IsUndefined(email)) {
        var regex = /^([a-zA-Z0-9_.+-])+\@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,4})+$/;
        return regex.test(email);
    }
    else return false;
}
Hope it helped you :)

Comments

Popular posts from this blog

SharePoint Online (O365) OAuth Authentication | Authorizing REST API calls against SharePoint Online Site | Get Access token from SharePoint Online | Set up OAuth for SharePoint Online Office 365

SharePoint 2013 REST API Reference

Simple Risk Assessment Matrix table with resultant risk calculation

Kendo UI (Core JavaScript) grid Server Paging, Server Sorting and Server Filtering with Dynamic SQL queries

Sharepoint- Using an Image From formatmap32x32.png in a Ribbon Control