Node.js Path模块源码两个常规表达

Question

我对node.js路径模块源中的2个正则表达式感到困惑

// Regex to split a windows path into three parts: [*, device, slash,
// tail] windows-only
var splitDeviceRe =
    /^([a-zA-Z]:|[\\\/]{2}[^\\\/]+[\\\/]+[^\\\/]+)?([\\\/])?([\s\S]*?)$/;

// Regex to split the tail part of the above into [*, dir, basename, ext]
var splitTailRe =
    /^([\s\S]*?)((?:\.{1,2}|[^\\\/]+?|)(\.[^.\/\\]*|))(?:[\\\/]*)$/;

剂量splitTailRe如何工作？ 与该组最混淆的： "((?:\\.{1,2}|[^\\\\\\/]+?|)(\\.[^.\\/\\\\]*|))"

Answer 1

这可能对您有所帮助

splitDeviceRE = https://regex101.com/r/mV5gS0/2

splitTailRe = https://regex101.com/r/mV5gS0/1

它分解了您输入的正则表达式，并逐步解释了正则表达式的每个“部分”在做什么。