JQuery Draggable with Gird Lines

by Yusril Maulidan Raji

HTML

<div id="canvas">
    <div id="box">
        <span class="topline"></span>
        <span class="rightline"></span>
        <span class="botline"></span>
        <span class="leftline"></span>
    </div>
</div>

CSS

#canvas {width: 1000px;height: 800px;}
.topline{
    position:absolute;
    width: 1000%;
    border-top:1px red dotted;
    display:none;
    vertical-align::middle;
    margin-top:-7px;
    margin-left:-250%;
}
.botline{
    position:absolute;
    width: 1000%;
    bottom:-2px;
    border-bottom:1px red dotted;
    display:none;
    vertical-align::middle;
    margin-top:500px;
    margin-left:-250%;
}
.leftline{
    position:absolute;
    height: 1000%;
    left:-2px;
    border-left:1px red dotted;
    display:none;
    vertical-align::middle;
    margin-top:-250%;
   
}
.rightline{
    position:absolute;
    height: 1000%;
    right:-2px;
    border-right:1px red dotted;
    display:none;
    vertical-align::middle;
    margin-top:-250%;
    
}
#box {
    cursor: move;
    border:1px solid black;
    width:150px;
    height:100px;
    min-width:80px;
    min-height:80px;
    padding:5px;
    background-color:#1196c1;
    
}

JavaScript

$(function() {
    $("#box").draggable({
        containment: "#canvas",
        drag: function() {
            $(this).find($('.topline')).css('display', 'block');
            $(this).find($('.rightline')).css('display', 'block');
            $(this).find($('.botline')).css('display', 'block');
            $(this).find($('.leftline')).css('display', 'block');
        },
        start: function() {
            $(this).find($('.topline')).css('display', 'block');
            $(this).find($('.rightline')).css('display', 'block');
            $(this).find($('.botline')).css('display', 'block');
            $(this).find($('.leftline')).css('display', 'block');
        },
        stop: function() {
            $(this).find($('.topline')).css('display', 'none');
            $(this).find($('.rightline')).css('display', 'none');
            $(this).find($('.botline')).css('display', 'none');
            $(this).find($('.leftline')).css('display', 'none');
        }
    });
});