You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
58 lines
1.4 KiB
58 lines
1.4 KiB
4 years ago
|
module.exports = function specificity(simpleSelector) {
|
||
|
|
var A = 0;
|
||
|
|
var B = 0;
|
||
|
|
var C = 0;
|
||
|
|
|
||
|
|
simpleSelector.children.each(function walk(node) {
|
||
|
|
switch (node.type) {
|
||
|
|
case 'SelectorList':
|
||
|
|
case 'Selector':
|
||
|
|
node.children.each(walk);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 'IdSelector':
|
||
|
|
A++;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 'ClassSelector':
|
||
|
|
case 'AttributeSelector':
|
||
|
|
B++;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 'PseudoClassSelector':
|
||
|
|
switch (node.name.toLowerCase()) {
|
||
|
|
case 'not':
|
||
|
|
node.children.each(walk);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 'before':
|
||
|
|
case 'after':
|
||
|
|
case 'first-line':
|
||
|
|
case 'first-letter':
|
||
|
|
C++;
|
||
|
|
break;
|
||
|
|
|
||
|
|
// TODO: support for :nth-*(.. of <SelectorList>), :matches(), :has()
|
||
|
|
|
||
|
|
default:
|
||
|
|
B++;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 'PseudoElementSelector':
|
||
|
|
C++;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 'TypeSelector':
|
||
|
|
// ignore universal selector
|
||
|
|
if (node.name.charAt(node.name.length - 1) !== '*') {
|
||
|
|
C++;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
return [A, B, C];
|
||
|
|
};
|