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我在删除表单验证中的自定义错误消息时遇到了困难。每次我提交表单时,消息都会复制,如果字段有效,我不知道如何删除它们。我很高兴听到你的回答!

form.onsubmit = function valCheck(ev) {
  ev.preventDefault();

  var fields = ev.target
  console.log(fields);

  var nameVal = /^[a-zA-ZäÄüÜöÖáàiìíéèóòúù `´,.'-]+$/;
  var emailVal = /[^\s@]+@[^\s@]+\.[^\s@]+/;

  for (var i = 0; i < formLen; i++) {
    var errorText = document.createElement('P');
    div[i].appendChild(errorText);
    console.log(errorText);

    if (fields[i].value === "") {
        errorText.innerHTML = "This field should not be empty"
    }
    else if (fields[i].type == "text") {
      if (!fields[i].value.match(nameVal)) {
        errorText.innerHTML = "no numbers allowed"
      }
    }
    else if (fields[i].type == "email") {
      if (!fields[i].value.match(emailVal)) {
        errorText.innerHTML  = "insert a valid adress"
      }
    }
    else if (fields[i].type == "checkbox") {
      if (!fields[i].checked) {
        errorText.innerHTML = "checkbox need to be checked"
      }
    }
    else if (fields[i].type == "radio") {
      if (fields[i].checked) {
        errorText.innerHTML = "you need to select something"
      }
    }
  }
}
4

1 回答 1

0

errorText.innerHTML我相信您可能只是在验证之前分配空值:

form.onsubmit = function valCheck(ev) {
  ev.preventDefault();

  errorText.innerHTML = '';

  // setting non-empty errorText.innerHTML if form is not valid
  // ...
}
于 2018-08-23T13:34:05.997 回答