带有非拉丁字符的 Javascript slug 函数

Question

我正在编写一个函数来从输入中生成 slug。

var vslug = function (str) {
  str = str.replace(/^\s+|\s+$/g, '');
  str = str.toLowerCase();
  var vregex = /(?:\.([^.]+))?$/;
  var filename  = str.replace(vregex.exec(str)[0],'');
  var extension = vregex.exec(str)[1];
  var from = "àáäâèéëêìíïîıòóöôùúüûñçşğ·/,:;";
  var to   = "aaaaeeeeiiiiioooouuuuncsg_____";
  for (var i = 0; i < from.length; i++) {
    console.log('before ' + str);
    str = filename.replace(new RegExp(from[i], 'g'), to[i]);
    console.log('after ' + str);
  }
  str = str.replace(/[^a-z0-9 _-]/g, '')
  .replace(/\s+/g, '_')
  .replace(/-+/g, '_');
  if (typeof extension !== "undefined") {
    return str+'.'+extension;
  } else {
    return str;
  }
};

我无法完成这部分 - 我失明了。任何帮助表示赞赏..

  var from = "àáäâèéëêìíïîıòóöôùúüûñçşğ·/,:;";
  var to   = "aaaaeeeeiiiiioooouuuuncsg_____";
  for (var i = 0; i < from.length; i++) {
    console.log('before ' + str);
    str = filename.replace(new RegExp(from[i], 'g'), to[i]);
    console.log('after ' + str);
  }

Answer 1

filename 没有改变 - 变量名称相同的字符串，字符串不能被修改。因此，每个循环在使用 filename.replace.. 时再次开始处理 original 字符串。

相反，消除filename（或完全集成）并使用str = str.replace..

str = str.replace(vregex.exec(str)[0],'');
for (var i = 0; i < from.length; i++) {
  str = str.replace(new RegExp(from[i], 'g'), to[i]);
  // ^-- next loop gets new value
}

（另外，这可以通过替换函数和映射而不是 n 循环来处理，并且可能有一个 JavaScript 的 Unicode 库可用..）

---

使用映射和替换函数的方法可能如下所示：

// Specify map somewhere reusable; can be built from paired arrays for simplicity.
var replacements = {"à":"a", "á":"a", .. ";":"_"}
// Object.keys is ES5, shim as needed. e.g. result: [à;á..]
var alternation = "[" + Object.keys(replacements).join("") + "]"
// This regex will match all characters we are trying to match.
var regex = new Regex(alternation, "g")

str = str.replace(regex, function (m) { 
    var r = replacements[m]
    return r || m        
})

见String.replace(regex, function)