Cssr (/ˈsiːzə/)

Cssr: Run-time Dynamic CSS Engine

In addition to allowing the use of variables and inheritance, Cssr automatically creates a relationship between your variables and the StyleSheets within your document, allowing you to change the variables at run-time.

Usage

Initialize Cssr by calling Cssr.apply() after the dom has loaded or on page load.

Note - variables MUST be declared inside of the /*Cssr */ comment in your style sheets.

Css Examples

1. Variables - Simply add /*Cssr {variables here} */ to the top of your stylesheets. Variable declarations and their assigned expressions follow standard JavaScript conventions are in fact evaluated in the global scope - you can use any JavaScript you can think of...

	<style type='text/css'>
        /*Cssr      
        var baseCalc = (100+30)-30;  
        var anotherCalc = (@baseCalc * 3) + "px";            
        var red = "rgba(255,0,0,1.0)";
        var green = "rgba(0,255,0,1.0)";
        var blue = "rgba(0,0,255,1.0)"
        */

        .my-div
        {
            background-color:@blue;
            width:@anotherCalc;
        }

        body
        {
            background:@green;
        }

    </style>     

Will resolve to:

	<style type='text/css'>
        /*Cssr      
        var baseCalc = (100+30)-30;  
        var anotherCalc = (@baseCalc * 3) + "px";            
        var red = "rgba(255,0,0,1.0)";
        var green = "rgba(0,255,0,1.0)";
        var blue = "rgba(0,0,255,1.0)"
        */

        .my-div
        {
            background-color:rgba(0,0,255,1.0);
            width:300px;
        }

        body
        {
            background:rgba(0,255,0,1.0);
        }

    </style>     

2. Inheritance - Uses the following syntax {selector} @{inheritedClassName}(|{additionalClassName})

    <style type="text/css">
        /*Cssr      
        var baseCalc = (100+30)-30;  
        var anotherCalc = (@baseCalc * 3) + "px";            
        var redVariable = "rgba(255,0,0,1.0)";
        var greenVariable = "rgba(0,255,0,1.0)";
        var blueVariable = "rgba(0,0,255,1.0)";
        */

        .my-foreground
        {
    		color:@redVariable;
		}

		.my-background
		{
			background-color:@blueVariable;
		}

		/* Using inheritance */

        .my-div  @my-foreground
        {
        
        	background-color:@blueVariable;
        	width:@anotherCalc;
        }

        .multiple-inheritance @my-foreground|my-background
        {
        	visibility:visible;
    	}

    </style>

Will resolve to:

	<style type='text/css'>
        /*Cssr      
        var baseCalc = (100+30)-30;  
        var anotherCalc = (@baseCalc * 3) + "px";            
        var redVariable = "rgba(255,0,0,1.0)";
        var greenVariable = "rgba(0,255,0,1.0)";
        var blueVariable = "rgba(0,0,255,1.0)";
        */

        .my-foreground
        {
    		color:rgba(255,0,0,1.0);
		}

		.my-background
		{
			background-color:rgba(0,0,255,1.0);
		}

		/* Using inheritance */

        .my-div  @my-foreground
        {
        	color:rgba(255,0,0,1.0); /* added from my-foreground */	
        	background-color:rgba(0,0,255,1.0);
        	width:300px;
        }

        .multiple-inheritance @my-foreground|my-background
        {
        	color:rgba(255,0,0,1.0); /* added from my-foreground */	
        	background-color:rgba(0,0,255,1.0); /* added from my-background */
        	visibility:visible;
    	}

    </style>     

3. Pre-apply Modification/Addition of Variables

   Variables can be added or overriden at runtime before application of Cssr by calling the following method:

   
    // i.e. Cssr.addVariable("blue","rgba(255,0,0,1.0)");
    // Adds a "blue" variable with the provided value OR if blue variable was defined in CSS will override that value before the apply happens.
    Cssr.addVariable(name,value); 
    

4. Post-apply Modification of Variables Variables can be modified at runtime after application of Cssr by calling the following method:

   
    // i.e. Cssr.changeVariable("blue","rgba(255,0,0,1.0)");
    // Changes all "blue" variables to the provided value.
    Cssr.changeVariable(name,value); 
    

License

The MIT License (MIT)

Copyright (c) 2013 Azad Ratzki

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.