flying-hero
96f6318101
新增: - backend/venv/ - Python 虚拟环境 - backend/start.sh - 启动脚本（使用虚拟环境） - backend/requirements.txt - 依赖列表 - .gitignore - 忽略虚拟环境和缓存文件 说明: - 每个项目使用独立虚拟环境 - 避免依赖冲突 - 启动脚本自动创建和激活虚拟环境
57 lines
1.4 KiB
JavaScript
57 lines
1.4 KiB
JavaScript
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];
|
|
};
|