Question

I use jQuery’s .css() method to apply styles to an element. I do this like so:

var cssObj = {
    'background-color' : '#000',
    'background-image': '-webkit-linear-gradient(top,#000,#fff)',
    'background-image': 'linear-gradient(top,#000,#fff)'
};

$(".element").css(cssObj);

The problem with this is that obviously I use duplicate keys in the object, which is not cool.

How can I solve this problem? I need to pass the CSS params with duplicate names to address most browsers.

Answer 1

Having multiple keys with the same name is not valid, and will generate an error in strict mode.

Create a function/plugin which applies the properties of your cssObj. If a string-string pair is found, set a CSS property with the desired value.
If an array is found, loop through it, and update the property with each value. If an invalid value is found, it’s ignored.

DEMO: http://jsfiddle.net/RgfQw/

// Created a plugin for project portability
(function($){
    $.fn.cssMap = function(map){
        var $element = this;
        $.each(map, function(property, value){
            if (value instanceof Array) {
                for(var i=0, len=value.length; i<len; i++) {
                    $element.css(property, value[i]);
                }
            } else {
                $element.css(property, value);
            }
        });
    }
})(jQuery);

// Usage:
var cssObj = {
    'background-color': '#000',
    'background-image': ['-webkit-linear-gradient(top,#000,#fff)',
                         'linear-gradient(top,#000,#fff)']
};
$(".element").cssMap(cssObj);