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Way to create plugin in jquery

Here is the demo code to create simple plugin in jquery :-

   $.fn.greenify = function () {
                this.css("background-color", "green");
                this.css("height", "100px");
                this.css("width", "100px");
                this.css("position", "relative");
                this.css("float", "left");
                return this;
            };

Above code is used to create one plugin function what can be used anywhere in same project or in different project and can be used in following way:

   $(document).ready(function () {
                $("div div").greenify().addClass("greeifiyclass");            
            });


Here is one complete demo that shows different way to create plugin :

  <script type="text/javascript">

        (function ($) {
            //user defined functions
            $.fn.greenify = function () {
                this.css("background-color", "green");
                this.css("height", "100px");
                this.css("width", "100px");
                this.css("position", "relative");
                this.css("float", "left");
                return this;
            };
            $.fn.yellowfy = function () {
                this.css("background-color", "yellow");
            };


            var i = 0;
            $.fn.looplogic = function () {
                if (i == 0) {
                    this.css("background-color", "yellow");
                    this.css("width", "180px");
                    this.css("height", "100px")
                    i = 1;
                }
                else {
                    this.css("background-color", "red");
                    this.css("width", "180px");
                    this.css("height", "100px")
                    i = 0;
                }
            };

            function apply() {
                $(".change").looplogic();
            };

            //apply user defined functions to respective elements
           $(document).ready(function () {
                $("div div").greenify().addClass("greeifiyclass");
                $("a").yellowfy();              
                setInterval(apply, 1000);

                $("div").click(function () {                  
                    location.href = "http://solvecode.blogspot.in";
                });
            });
           
        }(jQuery));
    </script>

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        <a href="http://solvecode.blogspot.in">click me</a>

You can see demo here CLICK HERE



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