read properties from css file

1.box {
2    position:absolute;
3    background-color:red;
4    height:10px;
5    width:10px;
6}
7

1function propertyFromStylesheet(selector, attribute) {
2    var value;
3
4    [].some.call(document.styleSheets, function (sheet) {
5        return [].some.call(sheet.rules, function (rule) {
6            if (selector === rule.selectorText) {
7                return [].some.call(rule.style, function (style) {
8                    if (attribute === style) {
9                        value = rule.style.getPropertyValue(attribute);
10                        return true;
11                    }
12
13                    return false;
14                });
15            }
16
17            return false;
18        });
19    });
20
21    return value;
22}
23
24console.log(propertyFromStylesheet(".box", "height"));
25