Tag Archives: javascript

New Facebook events invite dialog (October, 2014) invite all script [updated]

Written by . Filed under News. Tagged , , , , , , . .

Recently Facebook change the invite dialog.

This is the new Invite all for Facebook Javascript
Use Chrome Browser only !!!

  • 1. Open the invite dialog
  • 2. Scroll down to to load all friends list
  • 3. Open Developer Tools (see image)
    Open Developer Tools (Chrome)
  • 4. Click on “Console” tab in Developer Tools (see image)
    Console tab
  • 5. In “Console” past this code:
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    var x=document.querySelectorAll("._1v30.clearfix ._1v34");for(var i in x) {x[i].click(); }
  • 6. Press enter & wait :) – may take few minutes, don`t invite more then 500 every time.

Have fun

How to Compile JS & CSS to one file for best performance

Written by . Filed under Developer Tools, JavaScript, jQuery. Tagged , , , , , , , , , , , , , . .

Hey,
To get the best performance on your website you need to reduce external call like js & css files.
I build little BASH script that compile all your files to one JS file and one CSS file.

We will use some tools like : Google Closure & dos2unix

1. Create “build” folder in your application.
2. Create the files “js_list.txt” and “css_list.txt” and write line by line all your js & css files.
3. Download Google Closure and copy the file “compiler.jar” to this folder.
4. Create the file “build.sh”

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#!/bin/bash
# (c) Copyright by Garry Lachman - http://www.garry-lachman.com
# GNU/GPL
echo "" > full.js
echo "" > full.css
# JS
echo -e "\nBuild JS\n----------------"
while read line ; do
        JS_FILES[$index]="$line"
        index=$(($index+1))
done < js_list.txt

for f in "${JS_FILES[@]}"
do
        cat "../js/$f" >> full.js
        echo ";" >> full.js
        echo -e "* $f"
done

#CSS
echo -e "\nBuild CSS\n----------------"
index=0
while read line ; do
        CSS_FILES[$index]="$line"
        index=$(($index+1))
done < css_list.txt

for f in "${CSS_FILES[@]}"
do
        cat "../css/$f" >> full.css
        echo -e "* $f"
done

echo -e "\n"
echo -n "Compile JS"
java -jar compiler.jar --language_in ECMASCRIPT5 --compilation_level WHITESPACE_ONLY --js full.js --js_output_file full-compiled.js
echo " - Done"
echo -n "CSS Dos2Unix Format"
dos2unix full.css full.css
echo -e "Moving Compiled Files"
cp full.js ../js/full.js
cp full-compiled.js ../js/full-compiled.js
cp full.css ../css/full.css

5. I use the parent folders “js” and “css” but you can change it to your folder, just replace “../js/” & “../css/” to your path
6. Executing permission:

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chmod +x build.sh

7. Run the code

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./build.sh

You will see the output like:

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[root@web-serv build]# ./build.sh

Build JS
----------------
* flash_wrapper/swfobject.js
* jquery.tools.local.min.js
* jquery.dropkick-1.0.0.js

Build CSS
----------------
* style.css
* components.css

Compile JS - Done
CSS Dos2Unix Formatdos2unix: converting file full.css to UNIX format ...
dos2unix: converting file full.css to UNIX format ...
Moving Compiled Files

Now check the files: full.css & full-compiled.js

Have fun :)

jQuery Communicator Singleton (Manage & Cache ajax requests)

Written by . Filed under JavaScript, jQuery. Tagged , , , , , , , , , , , , , . .

Hey,
I wrote this class for cache ajax request if the same request sent twice.
The second reason why i use this class is a like there is only one exit point
from the application.

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var Communicator =(function(){
    var instantiated;
    var retry = new Array();
    var cached_data = new Array();

    function init (){
        return {
            dispatch:function(url, callback){
                var self = this;
                if (Communicator.getInstance().cached_data[url])    {
                    callback(Communicator.getInstance().cached_data[url]);
                    return;
                }
                if (!retry[url])    {
                    retry[url] = 0;
                }
                var _rq = $.ajax({
                    url: url,
                    timeout: 30000,
                    success: function(_data){
                        Communicator.getInstance().cached_data[url] = _data;
                        callback(_data);
                    },
                    error: function(){
                        if (retry[url] < 3) {
                            retry[url]++;
                            dispatch(url, callback, retry[url]);
                        }   else    {
                            callback("");  
                        }
                    }
                });
            },
            cached_data: {}
        }
    }

    return {
        getInstance :function(){
            if (!instantiated){
                instantiated = init();
            }
            return instantiated;
        }
    }
})()

Using the class

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Communicator.getInstance().dispatch(url,function(data){
    var error = false;
    try {
            data = eval("("+data+")");
    } catch(err)    {
        error = true;
    }

    if (!error)    {
        console.log(data);
    }                    
});

Have fun :)
Garry

JS: Prevent IE crash when using console (console.log)

Written by . Filed under JavaScript. Tagged , , , , , , , , , , , . .
console is undefined

console is undefined

When the console is close and we call console.log from javascript most of the times
Internet Explorer will crash with the message:
Error: ‘console’ is undefined

Here is my solution for this annoying bug.

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if (typeof console == 'undefined')   {
    var console = new Object();
    console.log = function(){}
    console.error = function(){}
    console.debug = function(){}
    console.warn = function(){}
}

Thanks “brucebannor” for advice.

Have fun :)
Garry Lachman

jQuery Plugin Template

Written by . Filed under JavaScript, jQuery. Tagged , , , , , , . .

Hey,
I want to share some template that i usually use for starting new jQuery Plugin.
its base template that contains public methods, private methods, settings and custom events.

And here it come..

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/*
    (c) By Garry Lachman (http://www.garry-lachman.com), GPL License
*/


var PluginCustomEvents = {
    EVENT: "myPluginCustomEvent"
};

(function($) {
    var plugin = this;

    $.fn.pluginTemplate = function(method) {
        var methods = {
            init : function(options) {
                this.pluginTemplate.settings = $.extend({}, this.pluginTemplate.defaults, options);
                return this.each(function() {
                    var $self = $(this);
                    var self = this;
                       
                });
            }
        };

        var privateMethods = {
            privateMethod: function(){

            }
        };

        if (methods[method]) {
            return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
        } else if (typeof method === 'object' || !method) {
            return methods.init.apply(this, arguments);
        } else {
            console.error("No Method: " + method);
        }
    }

    $.fn.pluginTemplate.defaults = {
        defaultProperty: "defaultValue"
    };

    $.fn.pluginTemplate.settings = {};


})(jQuery);

Init plugin:

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$("#target").pluginTemplate(); // rename it to your plugin name

// init with settings
$("#target").pluginTemplate({
    property1: "value"
});

Call public methods:

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$("#target").pluginTemplate("method_name", "parameters");

Call private methods (inside the plugin):

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privateMethods.privateMethod.call(this, parameters ...);

Have Fun ;)
Garry Lachman

jQuery Simple Popup Rect Window

Written by . Filed under jQuery. Tagged , , , , , , , , , , , . .

Hi,
I wrote a light and simple popup rect window with auto resize mode and buttons.

Popup Options

  • width, height = size of window
  • top, left = position in px set 0 set center
  • send_button = show send button
  • send_button_caption = send button caption
  • send_button_disabled = disbale send button
  • cancel_button = show cancel button
  • cancel_button_caption = disable cancel button

Popup Public Methods

  • enable_auto_resize = enable auto resize mode by content, for auto resize use Ben Alman jQuery resize
    event plugin from here: http://benalman.com/projects/jquery-resize-plugin/
  • change_height = change height (height in px, is using transcation)
  • set_content = send html content
  • get_content = get content rect
  • disbaled = disable and enable popup
  • send_button_disabled = disable and enable send button
  • add_click_event = add event to send and cancel buttons
  • close = close window

jquery.popup_rect.js file

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/*
(c) By Garry Lachman (http://www.garry-lachman.com), GPL License

Options:
* width, height = size of window
* top, left = position in px set 0 set center
* send_button = show send button
* send_button_caption = send button caption
* send_button_disabled = disbale send button
* cancel_button = show cancel button
* cancel_button_caption = disable cancel button

Methods
* enable_auto_resize = enable auto resize mode by content, for auto resize use Ben Alman jQuery resize
event plugin from here: http://benalman.com/projects/jquery-resize-plugin/
* change_height = change height (height in px, is using transcation)
* set_content = send html content
* get_content = get content rect
* disbaled = disable and enable popup
* send_button_disabled = disbale and enable send button
* add_click_event = add event to send and cancel buttons
* close = close window

*/


if (typeof Object.create !== 'function') {
    Object.create = function (o) {
        function F() {}
        F.prototype = o;
        return new F();
    };
}

var popup_rect = {
    init: function(options, elem)   {
        this.options = $.extend(true,{}, this.options, options);
       
        this.elem = elem;
        this.$elem = $(elem);

        this._build();
    },
    options:    {
        width: 100,
        height: 100,
        top: 0,
        left: 0,
        send_button: true,
        send_button_caption: "Save",
        send_button_disabled: false,
        cancel_button: true,
        cancel_button_caption: "Cancel"
    },
    _build: function()  {
        var _this = this;
        this.$elem.hide();
        this.$elem.addClass("popup_rect");
        this.$elem.css({width: this.options.width,
                height: this.options.height,
                top: this.options.top,
                left: this.options.left-this.options.width});

        this.$elem.append("<div id='popup_content' class='popup_rect_content'></div>");
        this.$elem.append("<div class='popup_rect_buttons'></div>");

        if (this.options.send_button)   {
            this.$elem.find(".popup_rect_buttons").append("<div id='popup_rect_send_button' class='popup_rect_button'>"+this.options.send_button_caption+"</div>");
        }
        if (this.options.cancel_button)   {
                        this.$elem.find(".popup_rect_buttons").append("<div id='popup_rect_cancel_button' class='popup_rect_button'>"+this.options.cancel_button_caption+"</div>");
                }

        this.$elem.find(".popup_rect_buttons").children().addClass("hand_cursor");
    },
    change_height: function(_h, _no_fx) {
        var _this = this;
        if (_no_fx) {
            this.$elem.height(_h);
            if (_this.options.top ==0 && _this.options.left == 0)       {
                _this.$elem.center({transition: 100});
            }
        }   else    {
            this.$elem.animate({
                height: _h
            }, 500, function(){
                if (_this.options.top ==0 && _this.options.left == 0)       {
                                _this.$elem.center({transition: 100});
                        }  
            });
        }
    },
    enable_auto_resize: function()  {
        var _this = this;
        this.$elem.find("#popup_content").resize(function(_event){
            _this.change_height(_event.target.clientHeight + 15 + _this.$elem.find(".popup_rect_buttons").height(),true);
        });
    },
    set_content: function(_content) {
        this.$elem.find("#popup_content").html(_content);
        this.$elem.show();
    },
    get_content: function() {
        return this.$elem.find("#popup_content");
    },
    add_click_event: function(_button, _function)   {
        var self = this;
        switch (_button)    {
            case "send":
                this.$elem.find(".popup_rect_buttons").find("#popup_rect_send_button").click(function(){
                    if (!self.options.send_button_disabled) {
                        _function();
                    }
                });
            break;

            case "cancel":
                                this.$elem.find(".popup_rect_buttons").find("#popup_rect_cancel_button").click(_function);
                        break;
        }
    },
    show_rect: function()   {
        this.$elem.show();
        if (this.options.top ==0 && this.options.left == 0)       {
                        this.$elem.center({transition: 100});
                }
    },
    disbaled: function (is_disbaled)    {
        if (is_disbaled)    {
            this.$elem.prepend("<div class='popup_rect_disbaled'></div>");
            this.$elem.find(".popup_rect_disbaled").css({width: this.options.width,
                                    height: this.options.height});
        }   else    {
            this.$elem.find(".popup_rect_disbaled").remove();
        }
    },
    send_button_disabled: function(is_disbaled) {
        this.options.send_button_disabled = is_disbaled;
        var fadeVal = is_disbaled ? 0.5 : 1;
        this.$elem.find(".popup_rect_buttons").find("#popup_rect_send_button").fadeTo('slow', fadeVal);
       
    },
    close: function(_this)  {
        _this = _this ? _this : this;
        _this.$elem.fadeOut('fast', function(){
                        $(_this).empty();
                });
    }

};

$.fn.extend({
  center: function (options) {  
       var options =  $.extend({ // Default values
            inside:window, // element, center into window
            transition: 0, // millisecond, transition time
            minX:0, // pixel, minimum left element value
            minY:0, // pixel, minimum top element value
            withScrolling:true, // booleen, take care of the scrollbar (scrollTop)
            vertical:true, // booleen, center vertical
            horizontal:true // booleen, center horizontal
       }, options);
       return this.each(function() {
            var props = {position:'absolute'};
            if (options.vertical) {
                 var top = ($(options.inside).height() - $(this).outerHeight()) / 2;
                 if (options.withScrolling) top += $(options.inside).scrollTop() || 0;
                 top = (top > options.minY ? top : options.minY);
                 $.extend(props, {top: top+'px'});
            }
               
            if (options.horizontal) {
                  var left = ($(options.inside).width() - $(this).outerWidth()) / 2;
                  if (options.withScrolling) left += $(options.inside).scrollLeft() || 0;
                  left = (left > options.minX ? left : options.minX);
                  $.extend(props, {left: left+'px'});
            }
            if (options.transition > 0) {
            $(this).animate(props, options.transition);
        } else {
            $(this).css(props);
        }
            return $(this);
               
       });     
  }
});

jquery.popup_rect.css file

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.popup_rect {
    background-color: #f7f7f7;
    border: 2px solid #949494;
    border-radius: 5px;
    position: absolute;
    z-index: 999999;
}
.popup_rect_content {
    padding: 20px;
}
.popup_rect_buttons {
    padding: 20px;
    position: absolute;
    bottom: 0px;
    right: 0px;
}
.popup_rect_button  {
    float: right;
    margin-left: 15px;
    border-radius: 5px;
    color: #000;
    font-weight: bold;
    padding-top: 2px; padding-bottom: 2px; padding-left: 5px; padding-right: 5px;
}

.popup_rect_disbaled    {
    position: absolute;
    background-color: white;
    z-index: 999;
    opacity: 0.6;
    filter: alpha(opacity=60);
}

test.html file

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<script type"text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript" src="jquery.popup_rect.js"></script>
<link href="jquery.popup_rect.css" rel="stylesheet" type="text/css" />

<div id="test_div"></div>

<script>
var rect = Object.create(popup_rect);
rect.init({
    height: 200,
    width: 300
}, $("#test_div"));
rect.get_content().append("<span>The Content</span>");
rect.show_rect();

rect.add_click_event("cancel", function(){
    alert("cancel");
});

rect.add_click_event("send", function(){
    alert("send");
});
</script>

Have fun,
Garry Lachman

Create Classes and Object in JavaScript & jQuery

Written by . Filed under JavaScript, jQuery. Tagged , , , , . .

There is few ways to create javascript object and use its as class.
In this artical i will you my favorite way to implement javascript classes.
I will combaine jQuery in this example.

First of all lets create basic object:

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var GarryObj = {
    init: function(options, target) {
        this.options = $.extends({}, this.options, options);
        this.$target = $(target);
        this._draw();
    },
    options:    {
        width: 100,
        height: 100,
    },
    _draw: function()   {
        this.$target.css({width: this.options.width,
                  height: this.options.height});
    }
}

We create here basic class that have 2 functions and one object to store the options.
the init class gets user options and the target (like html div).
then we merge the default options with the user options using jQuery extends function and
store the target as jQuery instance as $target.

The _draw function manipulate the target – here we build the ui by user options.

To create an instance of the class we need to add some code to the (i use to put it on js heaer file).

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if (typeof Object.create !== 'function') {
    Object.create = function (o) {
        function F() {}
        F.prototype = o;
        return new F();
    };
}

Now lets create a instance of our class:

We need to add target div:

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<div id="test_div"></div>

and than

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var garryTest = Object.create(GarryObj);
garryTest.init({width: 150, height: 150}, $("#test_div"));

Have fun ;)
Garry Lachman

7 best jQuery charts engines

Written by . Filed under JavaScript, jQuery. Tagged , , , , , . .

A chart is a graphical representation of data, in which “the data is represented by symbols, such as bars in a bar chart, lines in a line chart, or slices in a pie chart”.[1] A chart can represent tabular numeric data, functions or some kinds of qualitative structures. [wikipedia]

List of jQuery based Charts



jqPlot

Computation and drawing of lines, axes, shadows even the grid itself is handled by pluggable “renderers”. Not only are the plot elements customizable, plugins can expand functionality of the plot too! There are plenty of hooks into the core jqPlot code allowing for custom event handlers, creation of new plot types, adding canvases to the plot, and more!



Highcharts

Highcharts is a charting library written in pure JavaScript, offering intuitive, interactive charts to your web site or web application. Highcharts currently supports line, spline, area, areaspline, column, bar, pie and scatter chart types.



GraphUp

GraphUp is a very flexible and lightweight jQuery (v1.4+) plugin to spice up your data tables. It visualizes the values using color, bar charts and bubbles.



Flot

Flot is a pure Javascript plotting library for jQuery. It produces graphical plots of arbitrary datasets on-the-fly client-side.
The focus is on simple usage (all settings are optional), attractive looks and interactive features like zooming and mouse tracking.
The plugin works with Internet Explorer 6+, Firefox 2.x+, Safari 3.0+, Opera 9.5+ and Konqueror 4.x+ with the HTML canvas tag



JS Charts

JS Charts is a JavaScript based chart generator that requires little or no coding. With JS Charts drawing charts is a simple and easy task, since you only have to use client-side scripting (i.e. performed by your web browser). No additional plugins or server modules are required. Just include our scripts, prepare your chart data in XML, JSON or JavaScript Array and your chart is ready!



PlotKit

PlotKit is a Chart and Graph Plotting Library for Javascript. It has support for HTML Canvas and also SVG via Adobe SVG Viewer and native browser support.



Emprise JavaScript Charts

EJSChart has been fully tested and verified to work properly in the following browsers. This list covers roughly 95% of browser market share



Have Fun ;)
Garry

read POST variables with Javascript using PHP

Written by . Filed under JavaScript, PHP + mySQL. Tagged , , , , , , . .

Hi,
Today i will show very easy way to read POST variables from Javascript using PHP.

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<script type="text/javascript">// <![CDATA[
var post_json = "<?php echo json_encode($_POST); ?>";
// ]]></script>

We encode all POST vars with php to javascript JSON.
Now we can access the vars in simple way:

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post_json.var_name;

Have a nice day,
Garry

Custom Events in jQuery – bind & trigger

Written by . Filed under JavaScript, jQuery. Tagged , , , , , , , , . .

Sometimes custom events can make the life more easy.
If you want to communicate between classes and other object on the page you can simply
trigger a custom event with data.

First of all we create data exchange div:

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<div id="data_exchange"></div>

Now we need to listen the “data exchange” div to receive the events.

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$('#data_exchange').bind('event_name', function(event, data) {
  alert(event + ": " + data);
});

We show alert popup when we receive the event “event_name”.

The next step is dispatch the event to the “data exchange”:

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$('#data_exchange').trigger('event_name', 'our data');

Have a nice day ;)
Garry Lachman