javascript - 输入 : Disable letters only

Question

如何禁用输入中的字母，但仍允许用户键入 + 或 ( ) 等符号，并添加空格？

jsFiddle

$(".phone").on("keypress keyup blur",function (e) {    
    $(this).val($(this).val().replace(/^[a-zA-Z]+$/, ""));
        if ((e.which < 48 || e.which > 57)) {
            e.preventDefault();
    }
});

Answer 1

$(".phone").on("keypress keyup blur", function (event) {
  switch (event.keyCode) {
    case 43: // + character
    case 40: // the ( character
    case 41: // the ) character
      break;
    default:
      const regex = new RegExp("^[a-zA-Z0-9.,/ $@()]+$");
      const key = event.key;
      if (!regex.test(key)) {
        event.preventDefault();
        return false;
      }
      break;
  }
});