如何删除除括号和连字符(-)之外的所有特殊字符

function removeSpecialCharacters(str) {
  var result = "";
  for (var i = 0; i < str.length; i++) {
    var char = str.charAt(i);
    if (char === "(" || char === ")" || char === "-") {
      result += char;
    } else if (!char.match(/[^\w\s]/)) {
      result += char;
    }
  }
  return result;
}

var input = "如何删除除括号和连字符(-)之外的所有特殊字符？";
var output = removeSpecialCharacters(input);
console.log(output); // 输出：如何删除除括号和连字符-之外的所有特殊字符